anthonymeo/NEC-csv · Datasets at Hugging Face

Chapter 2 Wiring and Protection

220.46(A)

For show-window lighting, a load of not less than 660 volt-amperes/linear meter or 200 volt-amperes/linear foot shall be included for a show window, measured horizontally along its base. Informational Note: See 220.14(G) for branch circuits supplying show windows. [220.46(A)](https://2023.antflix.net#220.46(A))

https://2023.antflix.net#220.46(A)

Chapter 2 Wiring and Protection

220.46(B)

For track lighting in other than dwelling units or guest rooms or guest suites of hotels or motels, an additional load of 150 volt-amperes shall be included for every 600 mm (2 ft) of lighting track or fraction thereof. Where multicircuit track is installed, the load shall be considered to be divided equally between the track circuits. Exception: If the track lighting is supplied through a device that limits the current to the track, the load shall be permitted to be calculated based on the rating of the device used to limit the current. [220.46(B)](https://2023.antflix.net#220.46(B))

https://2023.antflix.net#220.46(B)

Chapter 2 Wiring and Protection

220.47

Receptacle loads calculated in accordance with 220.14(H) and (I) shall be permitted to be made subject to the demand factors given in Table 220.45 or Table 220.47. Table 220.47 Demand Factors for Non-Dwelling Receptacle Loads Portion of Receptacle Load to Which Demand Factor Applies (Volt-Amperes) Demand Factor (%) First 10 kVA or less at 100 Remainder over 10 kVA at 50 [220.47](https://2023.antflix.net#220.47)

https://2023.antflix.net#220.47

Chapter 2 Wiring and Protection

220.50(A)

The conductor sizing requirements specified in 430.24 and 430.25 and the feeder demand factor calculation method specified in 430.26 shall be used to determine motor loads. [220.50(A)](https://2023.antflix.net#220.50(A))

https://2023.antflix.net#220.50(A)

Chapter 2 Wiring and Protection

220.50(B)

The conductor sizing requirements specified in Part IV of Article 440 shall be used to determine air-conditioning loads for hermetic refrigerant motor-compressors. [220.50(B)](https://2023.antflix.net#220.50(B))

https://2023.antflix.net#220.50(B)

Chapter 2 Wiring and Protection

220.51

Fixed electric space-heating loads shall be calculated at 100 percent of the total connected load. However, in no case shall a feeder or service load current rating be less than the rating of the largest branch circuit supplied. Exception: If reduced loading of the conductors results from units operating on duty-cycle or intermittently, or from all units not operating at the same time, the authority having jurisdiction shall be permitted to grant permission for feeder and service conductors to have an ampacity less than 100 percent if the conductors have an ampacity for the load so determined. [220.51](https://2023.antflix.net#220.51)

https://2023.antflix.net#220.51

Chapter 2 Wiring and Protection

220.52(A)

In each dwelling unit, the load shall be calculated at 1500 volt-amperes for each 2-wire small-appliance branch circuit as covered by 210.11(C)(1). Where the load is subdivided through two or more feeders, the calculated load for each shall include not less than 1500 volt-amperes for each 2-wire small-appliance branch circuit. These loads shall be permitted to be included with the general lighting load and subjected to the demand factors provided in Table 220.45. Exception: The individual branch circuit permitted by 210.52(B)(1), Exception No. 2, shall be permitted to be excluded from the calculation required by 220.52. [220.52(A)](https://2023.antflix.net#220.52(A))

https://2023.antflix.net#220.52(A)

Chapter 2 Wiring and Protection

220.52(B)

A load of not less than 1500 volt-amperes shall be included for each 2-wire laundry branch circuit installed as covered by 210.11(C)(2). This load shall be permitted to be included with the general lighting load and shall be subjected to the demand factors provided in Table 220.45. [220.52(B)](https://2023.antflix.net#220.52(B))

https://2023.antflix.net#220.52(B)

Chapter 2 Wiring and Protection

220.53

Applying a demand factor of 75 percent to the nameplate rating load of four or more appliances rated 1/4 hp or greater, or 500 watts or greater, that are fastened in place, and that are served by the same feeder or service in a one-family, two-family, or multifamily dwelling shall be permitted. This demand factor shall not apply to the following: Household electric cooking equipment that is fastened in placeClothes dryersSpace heating equipmentAir-conditioning equipmentElectric vehicle supply equipment (EVSE) [220.53](https://2023.antflix.net#220.53)

https://2023.antflix.net#220.53

Chapter 2 Wiring and Protection

220.54

The load for household electric clothes dryers in a dwelling unit(s) shall be either 5000 watts (volt-amperes) or the nameplate rating, whichever is larger, for each dryer served. The use of the demand factors in Table 220.54 shall be permitted. Where two or more single-phase dryers are supplied by a 3-phase, 4-wire feeder or service, the total load shall be calculated on the basis of twice the maximum number connected between any two phases. Kilovolt-amperes (kVA) shall be considered equivalent to kilowatts (kW) for loads calculated in this section. Table 220.54 Demand Factors for Household Electric Clothes Dryers Number of Dryers Demand Factor (%) 1—4 100 5 85 6 75 7 65 8 60 9 55 10 50 11 47 12—23 47% minus 1% for each dryer exceeding 11 24—42 35% minus 0.5% for each dryer exceeding 23 43 and over 25% [220.54](https://2023.antflix.net#220.54)

https://2023.antflix.net#220.54

Chapter 2 Wiring and Protection

220.55

The load for household electric ranges, wall-mounted ovens, counter-mounted cooking units, and other household cooking appliances individually rated in excess of 13/4 kW shall be permitted to be calculated in accordance with Table 220.55. Kilovolt-amperes (kVA) shall be considered equivalent to kilowatts (kW) for loads calculated under this section. Where two or more single-phase ranges are supplied by a 3-phase, 4-wire feeder or service, the total load shall be calculated on the basis of twice the maximum number connected between any two phases. Informational Note No. 1: See Informative Annex D for examples. Informational Note No. 2: See Table 220.56 for demand factors for commercial cooking equipment. Table 220.55 Demand Factors and Loads for Household Electric Ranges, Wall-Mounted Ovens, Counter-Mounted Cooking Units, and Other Household Cooking Appliances over 13/4 kW Rating (Column C to be used in all cases except as otherwise permitted in Note 3.) Number of Appliances Demand Factor (%) (See Notes) Column C Maximum Demand (kW)(See Notes) (Not over 12 kW Rating) Column A (Less than 31/2 kW Rating) Column B (31/2 kW through 83/4 kW Rating) 1 80 80 8 2 75 65 11 3 70 55 14 4 66 50 17 5 62 45 20 6 59 43 21 7 56 40 22 8 53 36 23 9 51 35 24 10 49 34 25 11 47 32 26 12 45 32 27 13 43 32 28 14 41 32 29 15 40 32 30 16 39 28 31 17 38 28 32 18 37 28 33 19 36 28 34 20 35 28 35 21 34 26 36 22 33 26 37 23 32 26 38 24 31 26 39 25 30 26 40 26—30 30 24 15 kW + 1 kW for each range 31—40 30 22 41—50 30 20 25 kW + 3/4 kW for each range 51—60 30 18 61 and over 30 16 Notes:Over 12 kW through 27 kW ranges all of same rating. For ranges individually rated more than 12 kW but not more than 27 kW, the maximum demand in Column C shall be increased 5 percent for each additional kilowatt of rating or major fraction thereof by which the rating of individual ranges exceeds 12 kW.Over 83/4 kW through 27 kW ranges of unequal ratings. For ranges individually rated more than 83/4 kW and of different ratings, but none exceeding 27 kW, an average value of rating shall be calculated by adding together the ratings of all ranges to obtain the total connected load (using 12 kW for any range rated less than 12 kW) and dividing by the total number of ranges. Then the maximum demand in Column C shall be increased 5 percent for each kilowatt or major fraction thereof by which this average value exceeds 12 kW.Over 13/4 kW through 83/4 kW. In lieu of the method provided in Column C, adding the nameplate ratings of all household cooking appliances rated more than 13/4 kW but not more than 83/4 kW and multiplying the sum by the demand factors specified in Column A or Column B for the given number of appliances shall be permitted. Where the rating of cooking appliances falls under both Column A and Column B, the demand factors for each column shall be applied to the appliances for that column, and the results added together.Calculating the branch-circuit load for one range in accordance with Table 220.55 shall be permitted.The branch-circuit load for one wall-mounted oven or one counter-mounted cooking unit shall be the nameplate rating of the appliance.The branch-circuit load for a counter-mounted cooking unit and not more than two wall-mounted ovens, all supplied from a single branch circuit and located in the same room, shall be calculated by adding the nameplate rating of the individual appliances and treating this total as equivalent to one range.This table shall also apply to household cooking appliances rated over 13/4 kW and used in instructional programs. [220.55](https://2023.antflix.net#220.55)

https://2023.antflix.net#220.55

Chapter 2 Wiring and Protection

220.56

Calculating the load for commercial electric cooking equipment, dishwasher booster heaters, water heaters, and other kitchen equipment in accordance with Table 220.56 shall be permitted. Other kitchen equipment shall include equipment that is fastened in place and rated 1/4 hp or greater, or 500 watts or greater. These demand factors shall be applied to all equipment that has either thermostatic control or intermittent use as kitchen equipment. These demand factors shall not apply to space-heating, ventilating, or air-conditioning equipment. However, in no case shall the feeder or service calculated load be less than the sum of the largest two kitchen equipment loads. Table 220.56 Demand Factors for Kitchen Equipment - Other Than Dwelling Unit(s) Number of Units of Equipment Demand Factor (%) 1 100 2 100 3 90 4 80 5 70 6 and over 65 [220.56](https://2023.antflix.net#220.56)

https://2023.antflix.net#220.56

Chapter 2 Wiring and Protection

220.57

The EVSE load shall be calculated at either 7200 watts (volt-amperes) or the nameplate rating of the equipment, whichever is larger. [220.57](https://2023.antflix.net#220.57)

https://2023.antflix.net#220.57

Chapter 2 Wiring and Protection

220.60

If it is unlikely that two or more noncoincident loads will be in use simultaneously, using only the largest load(s) that will be used at one time for calculating the total load of a feeder or service shall be permitted. If a motor or air-conditioning load is part of the noncoincident load and is not the largest of the noncoincident loads, 125 percent of either the motor load or air-conditioning load, whichever is larger, shall be used in the calculation. [220.60](https://2023.antflix.net#220.60)

https://2023.antflix.net#220.60

Chapter 2 Wiring and Protection

220.61(A)

The feeder or service neutral load shall be the maximum unbalance of the load determined by this article. The maximum unbalanced load shall be the maximum net calculated load between the neutral conductor and any one ungrounded conductor. Exception: For 3-wire, 2-phase or 5-wire, 2-phase systems, the maximum unbalanced load shall be the maximum net calculated load between the neutral conductor and any one ungrounded conductor multiplied by 140 percent. [220.61(A)](https://2023.antflix.net#220.61(A))

https://2023.antflix.net#220.61(A)

Chapter 2 Wiring and Protection

220.61(B)

A service or feeder supplying the following loads shall be permitted to have an additional demand factor of 70 percent applied to the amount in 220.61(B)(1) and a portion of the amount in 220.61 (B)(2). [220.61(B)](https://2023.antflix.net#220.61(B))

https://2023.antflix.net#220.61(B)

Chapter 2 Wiring and Protection

220.61(B)(1)

A feeder or service supplying household electric ranges, wall-mounted ovens, counter-mounted cooking units, and electric dryers, where the maximum unbalanced load has been determined in accordance with Table 220.55 for ranges and Table 220.54 for dryers. [220.61(B)(1)](https://2023.antflix.net#220.61(B)(1))

https://2023.antflix.net#220.61(B)(1)

Chapter 2 Wiring and Protection

220.61(B)(2)

That portion of the unbalanced load in excess of 200 amperes where the feeder or service is supplied from a 3-wire dc or single-phase ac system; a 4-wire, 3-phase system; a 3-wire, 2-phase system; or a 5-wire, 2-phase system. Informational Note: See Informative Annex D, Examples D1(a), D1(b), D2(b), D4(a), and D5(a) for examples of unbalanced feeder or service neutral loads. [220.61(B)(2)](https://2023.antflix.net#220.61(B)(2))

https://2023.antflix.net#220.61(B)(2)

Chapter 2 Wiring and Protection

220.61(C)

There shall be no reduction of the neutral or grounded conductor capacity applied to the amount in 220.61 (C)(1), or portion of the amount in (C)(2), from that determined by the basic calculation: Any portion of a 3-wire circuit consisting of 2 ungrounded conductors and the neutral conductor of a 4-wire, 3-phase, wye-connected systemThat portion consisting of nonlinear loads supplied from a 4-wire, wye-connected, 3-phase systemInformational Note: A 3-phase, 4-wire, wye-connected power system used to supply power to nonlinear loads might necessitate that the power system design allows for the possibility of high harmonic neutral conductor currents. [220.61(C)](https://2023.antflix.net#220.61(C))

https://2023.antflix.net#220.61(C)

Chapter 2 Wiring and Protection

220.70

If an energy management system (EMS) is used to limit the current to a feeder or service in accordance with 750.30, a single value equal to the maximum ampere setpoint of the EMS shall be permitted to be used in load calculations for the feeder or service. The setpoint value of the EMS shall be considered a continuous load for the purposes of load calculations. [220.70](https://2023.antflix.net#220.70)

https://2023.antflix.net#220.70

Chapter 2 Wiring and Protection

220.80

Optional feeder and service load calculations shall be permitted in accordance with Part IV. [220.80](https://2023.antflix.net#220.80)

https://2023.antflix.net#220.80

Chapter 2 Wiring and Protection

220.82(A)

This section applies to a dwelling unit having the total connected load served by a single 120/240-volt or 208Y/120-volt set of 3-wire service or feeder conductors with an ampacity of 100 or greater. It shall be permissible to calculate the feeder and service loads in accordance with this section instead of the method specified in Part III of this article. The calculated load shall be the result of adding the loads from 220.82(B) and (C). Feeder and service-entrance conductors whose calculated load is determined by this optional calculation shall be permitted to have the neutral load determined by 220.61. [220.82(A)](https://2023.antflix.net#220.82(A))

https://2023.antflix.net#220.82(A)

Chapter 2 Wiring and Protection

220.82(B)

The general calculated load shall be not less than 100 percent of the first 10 kVA plus 40 percent of the remainder of the following loads: 33 volt-amperes/m2 or 3 volt-amperes/ft2 for general lighting and general-use receptacles. The floor area for each floor shall be calculated from the outside dimensions of the dwelling unit. The calculated floor area shall not include open porches, garages, or unused or unfinished spaces not adaptable for future use.1500 volt-amperes for each 2-wire, 20-ampere small-appliance branch circuit and each laundry branch circuit covered in 210.11(C)(1) and (C)(2).The nameplate rating of the following:All appliances that are fastened in place, permanently connected, or located to be on a specific circuitRanges, wall-mounted ovens, counter-mounted cooking unitsClothes dryers that are not connected to the laundry branch circuit specified in 220.82(B)(2)Water heatersThe nameplate ampere or kVA rating of all permanently connected motors not included in 220.82(B)(3). [220.82(B)](https://2023.antflix.net#220.82(B))

https://2023.antflix.net#220.82(B)

Chapter 2 Wiring and Protection

220.82(C)

The largest of the following six selections (load in kVA) shall be included: 100 percent of the nameplate rating(s) of the air conditioning and cooling.100 percent of the nameplate rating(s) of the heat pump when the heat pump is used without any supplemental electric heating.100 percent of the nameplate rating(s) of the heat pump compressor and 65 percent of the supplemental electric heating for central electric space-heating systems. If the heat pump compressor is prevented from operating at the same time as the supplementary heat, it does not need to be added to the supplementary heat for the total central space heating load.65 percent of the nameplate rating(s) of electric space heating if less than four separately controlled units.40 percent of the nameplate rating(s) of electric space heating if four or more separately controlled units.100 percent of the nameplate ratings of electric thermal storage and other heating systems where the usual load is expected to be continuous at the full nameplate value. Systems qualifying under this selection shall not be calculated under any other selection in 220.82(C). [220.82(C)](https://2023.antflix.net#220.82(C))

https://2023.antflix.net#220.82(C)

Chapter 2 Wiring and Protection

220.83

This section shall be permitted to be used to determine if the existing service or feeder is of sufficient capacity to serve additional loads. Where the dwelling unit is served by a 120/240-volt or 208Y/120-volt, 3-wire service or feeder, calculating the total load in accordance with 220.83(A) or (B) shall be permitted. [220.83](https://2023.antflix.net#220.83)

https://2023.antflix.net#220.83

Chapter 2 Wiring and Protection

220.83(A)

The percentages listed in Table 220.83(A) shall be used for existing and additional new loads. Load calculations shall include the following:General lighting and general-use receptacles at 33 volt-amperes/m2 or 3 volt-amperes/ft2 as determined by 220.421500 volt-amperes for each 2-wire, 20-ampere small-appliance branch circuit and each laundry branch circuit covered in 210.11(C)(1) and (C)(2)The nameplate rating of the following:All appliances that are fastened in place, permanently connected, or located to be on a specific circuitRanges, wall-mounted ovens, counter-mounted cooking unitsClothes dryers that are not connected to the laundry branch circuit specified in item (2)Water heatersTable 220.83(A) Without Additional Air-Conditioning or Electric Space-Heating Equipment Load (kVA) Percent of Load First 8 kVA of load at 100 Remainder of load at 40 [220.83(A)](https://2023.antflix.net#220.83(A))

https://2023.antflix.net#220.83(A)

Chapter 2 Wiring and Protection

220.83(B)

The percentages listed in Table 220.83(B) shall be used for existing and additional new loads. The larger connected load of air conditioning or space heating, but not both, shall be used. Other loads shall include the following:General lighting and general-use receptacles at 33 volt-amperes/m2 or 3 volt-amperes/ft2 as determined by 220.421500 volt-amperes for each 2-wire, 20-ampere small-appliance branch circuit and each laundry branch circuit covered in 210.11(C)(1) and (C)(2)The nameplate rating of the following:All appliances that are fastened in place, permanently connected, or located to be on a specific circuitRanges, wall-mounted ovens, counter-mounted cooking unitsClothes dryers that are not connected to the laundry branch circuit specified in item (2)Water heatersTable 220.83(B) With Additional Air-Conditioning or Electric Space-Heating Equipment Load Percent of Load Air-conditioning equipment 100 Central electric space heating 100 Less than four separately controlled space-heating units 100 First 8 kVA of all other loads 100 Remainder of all other loads 40 [220.83(B)](https://2023.antflix.net#220.83(B))

https://2023.antflix.net#220.83(B)

Chapter 2 Wiring and Protection

220.84(A)

It shall be permissible to calculate the load of a feeder or service that supplies three or more dwelling units of a multifamily dwelling in accordance with Table 220.84(B) instead of Part III of this article if all the following conditions are met: No dwelling unit is supplied by more than one feeder.Each dwelling unit is equipped with electric cooking equipment.Exception: When the calculated load for multifamily dwellings without electric cooking in Part III of this article exceeds that calculated under Part IV for the identical load plus electric cooking (based on 8 kW per unit), the lesser of the two loads shall be permitted to be used.Each dwelling unit is equipped with either electric space heating or air conditioning, or both. Feeders and service conductors whose calculated load is determined by this optional calculation shall be permitted to have the neutral load determined by 220.61. [220.84(A)](https://2023.antflix.net#220.84(A))

https://2023.antflix.net#220.84(A)

Chapter 2 Wiring and Protection

220.84(B)

House loads shall be calculated in accordance with Part III of this article and shall be in addition to the dwelling unit loads calculated in accordance with Table 220.84(B). Table 220.84(B) Optional Calculations - Demand Factors for Three or More Multifamily Dwelling Units Number of Dwelling Units Demand Factor % 3—5 45 6—7 44 8—10 43 11 42 12—13 41 14—15 40 16—17 39 18—20 38 21 37 22—23 36 24—25 35 26—27 34 28—30 33 31 32 32—33 31 34—36 30 37—38 29 39—42 28 43—45 27 46—50 26 51—55 25 56—61 24 62 and over 23 [220.84(B)](https://2023.antflix.net#220.84(B))

https://2023.antflix.net#220.84(B)

Chapter 2 Wiring and Protection

220.84(C)

The calculated load to which the demand factors of Table 220.84(B) apply shall include the following: 33 volt-amperes/m2 or 3 volt-amperes/ft2 for general lighting and general-use receptacles1500 volt-amperes for each 2-wire, 20-ampere small-appliance branch circuit and each laundry branch circuit covered in 210.11(C)(1) and (C)(2)The nameplate rating of the following:All appliances that are fastened in place, permanently connected, or located to be on a specific circuitRanges, wall-mounted ovens, counter-mounted cooking unitsClothes dryers that are not connected to the laundry branch circuit specified in item (2)Water heatersThe nameplate ampere or kVA rating of all permanently connected motors not included in item (3)The larger of the air-conditioning load or the fixed electric space-heating load [220.84(C)](https://2023.antflix.net#220.84(C))

https://2023.antflix.net#220.84(C)

Chapter 2 Wiring and Protection

220.85

Where two dwelling units are supplied by a single feeder or service and the calculated load under Part III of this article exceeds that for three identical units calculated under 220.84, the lesser of the two loads shall be permitted to be used. [220.85](https://2023.antflix.net#220.85)

https://2023.antflix.net#220.85

Chapter 2 Wiring and Protection

220.86

The calculation of a feeder or service load for schools shall be permitted in accordance with Table 220.86 in lieu of Part III of this article where equipped with electric space heating, air conditioning, or both. The connected load to which the demand factors of Table 220.86 apply shall include all of the interior and exterior lighting, power, water heating, cooking, other loads, and the larger of the air-conditioning load or space-heating load within the building or structure. Feeders and service conductors whose calculated load is determined by this optional calculation shall be permitted to have the neutral load determined by 220.61. Where the building or structure load is calculated by this optional method, feeders within the building or structure shall have ampacity as permitted in Part III of this article; however, the ampacity of an individual feeder shall not be required to be larger than the ampacity for the entire building. This section shall not apply to portable classroom buildings. Table 220.86 Optional Method - Demand Factors for Feeders and Service Conductors for Schools Connected Load Demand Factor (%) Calculated Loads (VA) Total VA/m2 Total VA/ft2 0—33 0—3 100 Amount × 100% Over 33—220 Over 3—20 75 (Amount × 75%) + 3 Remainder over 220 Remainder over 20 25 (Amount × 25%) + 15.75 [220.86](https://2023.antflix.net#220.86)

https://2023.antflix.net#220.86

Chapter 2 Wiring and Protection

220.87

The calculation of a feeder or service load for existing installations shall be permitted to use actual maximum demand to determine the existing load under all of the following conditions: The maximum demand data is available for a 1-year period.Exception: If the maximum demand data for a 1-year period is not available, the calculated load shall be permitted to be based on the maximum demand (the highest average kilowatts reached and maintained for a 15-minute interval) continuously recorded over a minimum 30-day period using a recording ammeter or power meter connected to the highest loaded phase of the feeder or service, based on the initial loading at the start of the recording. The recording shall reflect the maximum demand of the feeder or service by being taken when the building or space is occupied and shall include by measurement or calculation the larger of the heating or cooling equipment load, and other loads that might be periodic in nature due to seasonal or similar conditions. This exception shall not be permitted if the feeder or service has a renewable energy system (i.e., solar photovoltaic or wind electric) or employs any form of peak load shaving.The maximum demand at 125 percent plus the new load does not exceed the ampacity of the feeder or rating of the service.The feeder has overcurrent protection in accordance with 240.4, and the service has overload protection in accordance with 230.90. [220.87](https://2023.antflix.net#220.87)

https://2023.antflix.net#220.87

Chapter 2 Wiring and Protection

220.88

Calculation of a service or feeder load, where the feeder serves the total load, for a new restaurant shall be permitted in accordance with Table 220.88 in lieu of Part III of this article. The overload protection of the service conductors shall be in accordance with 230.90 and 240.4. Feeder conductors shall not be required to be of greater ampacity than the service conductors. Service or feeder conductors whose calculated load is determined by this optional calculation shall be permitted to have the neutral load determined by 220.61. Table 220.88 Optional Method - Permitted Load Calculations for Service and Feeder Conductors for New Restaurants Total Connected Load (kVA) All Electric Restaurant Not All Electric Restaurant Calculated Loads (kVA) Calculated Loads (kVA) 0—200 80% 100% 201—325 10% (amount over 200) + 160.0 50% (amount over 200) + 200.0 326—800 50% (amount over 325) + 172.5 45% (amount over 325) + 262.5 Over 800 50% (amount over 800) + 410.0 20% (amount over 800) + 476.3 Note: Add all electrical loads, including both heating and cooling loads, to calculate the total connected load. Select the one demand factor that applies from the table, then multiply the total connected load by this single demand factor. [220.88](https://2023.antflix.net#220.88)

https://2023.antflix.net#220.88

Chapter 2 Wiring and Protection

220.100

Farm loads shall be calculated in accordance with Part V. [220.100](https://2023.antflix.net#220.100)

https://2023.antflix.net#220.100

Chapter 2 Wiring and Protection

220.102(A)

The feeder or service load of a farm dwelling unit shall be calculated in accordance with the provisions for dwellings in Part III or IV of this article. Where the dwelling has electric heat and the farm has electric grain-drying systems, Part IV of this article shall not be used to calculate the dwelling load where the dwelling and farm loads are supplied by a common service. [220.102(A)](https://2023.antflix.net#220.102(A))

https://2023.antflix.net#220.102(A)

Chapter 2 Wiring and Protection

220.102(B)

Where a feeder or service supplies a farm building or other load having two or more separate branch circuits, the load for feeders, service conductors, and service equipment shall be calculated in accordance with demand factors not less than indicated in Table 220.102(B). Table 220.102(B) Method for Calculating Farm Loads for Other Than Dwelling Unit Ampere Load at 240 Volts Maximum Demand Factor (%) The greater of the following: All loads that are expected to operate simultaneously, or 100 125 percent of the full load current of the largest motor, or First 60 amperes of the load Next 60 amperes of all other loads 50 Remainder of other loads 25 [220.102(B)](https://2023.antflix.net#220.102(B))

https://2023.antflix.net#220.102(B)

Chapter 2 Wiring and Protection

220.103

Where supplied by a common service, the total load of the farm for service conductors and service equipment shall be calculated in accordance with the farm dwelling unit load and demand factors specified in Table 220.103. Where there is equipment in two or more farm equipment buildings or for loads having the same function, such loads shall be calculated in accordance with Table 220.102(B) and shall be permitted to be combined as a single load in Table 220.103 for calculating the total load. Table 220.103 Method for Calculating Total Farm Load Individual Loads Calculated in Accordance with Table 220.102 Demand Factor (%) Largest load 100 Second largest load 75 Third largest load 65 Remaining loads 50 Note: To this total load, add the load of the farm dwelling unit calculated in accordance with Part III or IV of this article. Where the dwelling has electric heat and the farm has electric grain-drying systems, Part IV of this article shall not be used to calculate the dwelling load. [220.103](https://2023.antflix.net#220.103)

https://2023.antflix.net#220.103

Chapter 2 Wiring and Protection

220.110

Receptacle loads calculated in accordance with 220.14(H) and (I) and supplied by branch circuits not exceeding 150 volts to ground shall be permitted to be subjected to the demand factors provided in Table 220.110(1) and Table 220.110(2) for health care facilities. Informational Note No. 1: See Article 100 for the definitions of patient care space categories. Informational Note No. 2: See 220.14(I) for the calculation of receptacle outlet loads. Table 220.110(1) Demand Factors for Receptacles Supplied by General-Purpose Branch Circuits in Category 1 and Category 2 Patient Care Spaces Portion of Receptacle Load to Which Demand Factor Applies (Volt-Amperes) Demand Factor (%) First 5000 or less 100 From 5001 to 10,000 50 Remainder over 10,000 25 Table 220.110(2) Demand Factors for Receptacles Supplied by General-Purpose Branch Circuits in Category 3 and Category 4 Patient Care Spaces Portion of Receptacle Load to Which Demand Factor Applies (Volt-Amperes) Demand Factor (%) First 10,000 or less 100 Remainder over 10,000 50 [220.110](https://2023.antflix.net#220.110)

https://2023.antflix.net#220.110

Chapter 2 Wiring and Protection

220.120

General lighting and other loads in marinas, boatyards, floating buildings, and commercial and noncommercial docking facilities shall be calculated in accordance with Part III of this article and, in addition, the demand factors set forth in Table 220.120 shall be permitted for each service or feeder circuit supplying receptacles that provide shore power for boats. These calculations shall be permitted to be modified as indicated in Notes (1) and (2) of Table 220.120. Where demand factors of Table 220.120 are applied, the demand factor specified in 220.61 (B) shall not be permitted. Informational Note: These demand factors could be inadequate in areas of extreme hot or cold temperatures with loaded circuits for heating, air-conditioning, or refrigerating equipment. Table 220.120 Demand Factors for Shore Power Receptacle Loads Number of Shore Power Receptacles Sum of the Rating of the Receptacles (%) 1—4 100 5—8 90 9—14 80 15—30 70 31—40 60 41—50 50 51—70 40 ≥71 30 Notes:Where shore power accommodations provide two receptacles specifically for an individual boat slip and these receptacles have different voltages (e.g., one 30-ampere, 125-volt and one 50-ampere, 125/250-volt), only the receptacle with the larger kilowatt demand shall be required to be calculated.For each shore powered pedestal being installed that includes an individual kilowatt-hour submeters for each slip and is being calculated using the criteria listed in Table 220.120, the total demand amperes shall be permitted to be multiplied by 0.9 to achieve the final demand amperes of the facility.If a circuit feeding a boat hoist and shore power for the same boat slip is shared, only the load with the larger kilowatt demand shall be required to be counted in the load calculation. [220.120](https://2023.antflix.net#220.120)

https://2023.antflix.net#220.120

Chapter 2 Wiring and Protection

225.1

This article covers requirements for outside branch circuits and feeders not over 1000 volts ac or 1500 volts dc, nominal, run on or between buildings, structures, or poles on the premises; and electrical equipment and wiring for the supply of utilization equipment that is located on or attached to the outside of buildings, structures, or poles. Informational Note: See Part IV of Article 235 for outside branch circuits and feeders over 1000 volts ac or 1500 volts dc. [225.1](https://2023.antflix.net#225.1)

https://2023.antflix.net#225.1

Chapter 2 Wiring and Protection

225.3

Application of other articles, including additional requirements to specific cases of equipment and conductors, is shown in Table 225.3. Table 225.3 Other Articles Equipment/Conductors Article Branch circuits 210 Class 1 power-limited circuits and Class 1 power-limited remote-control and signaling circuits 724 Class 2 and Class 3 remote-control, signaling, and power-limited circuits 725 Conductors for general wiring 310 Electrically driven or controlled irrigation machines 675 Electric signs and outline lighting 600 Feeders 215 Fire alarm systems 760 Fixed outdoor electric deicing and snow-melting equipment 426 Grounding and bonding 250 Hazardous (classified) locations 500 Marinas and boatyards 555 Medium-voltage conductors and cable 311 Messenger-supported wiring 396 Mobile homes, manufactured homes, and mobile home parks 550 Open wiring on insulators 398 Over 1000 volts, general 495 Overcurrent protection 240 Overcurrent protection for systems rated over 1000 volts ac, 1500 volts dc 245 Services 230 Services, feeders, and branch circuits over 1000 volts ac, 1500 volts dc 235 Solar photovoltaic systems 690 Swimming pools, fountains, and similar installations 680 Use and identification of grounded conductors 200 [225.3](https://2023.antflix.net#225.3)

https://2023.antflix.net#225.3

Chapter 2 Wiring and Protection

225.4

Where within 3.0 m (10 ft) of any building or structure other than supporting poles or towers, open individual (aerial) overhead conductors shall be insulated for the nominal voltage. The insulation of conductors in cables or raceways, except Type MI cable, shall be of thermoset or thermoplastic type and, in wet locations, shall comply with 310.10(C). The insulation of conductors for festoon lighting shall be of the thermoset or thermoplastic type. Exception: Equipment grounding conductors and grounded circuit conductors shall be permitted to be bare or covered as specifically permitted elsewhere in this Code. [225.4](https://2023.antflix.net#225.4)

https://2023.antflix.net#225.4

Chapter 2 Wiring and Protection

225.6(A)

Open individual conductors shall not be smaller than 10 AWG copper or 8 AWG aluminum for spans up to 15 m (50 ft) in length, and 8 AWG copper or 6 AWG aluminum for a longer span unless supported by a messenger wire. [225.6(A)](https://2023.antflix.net#225.6(A))

https://2023.antflix.net#225.6(A)

Chapter 2 Wiring and Protection

225.6(B)

Overhead conductors for festoon lighting shall not be smaller than 12 AWG unless the conductors are supported by messenger wires. In all spans exceeding 12 m (40 ft), the conductors shall be supported by messenger wire. The messenger wire shall be supported by strain insulators. Conductors or messenger wires shall not be attached to any fire escape, downspout, or plumbing equipment. [225.6(B)](https://2023.antflix.net#225.6(B))

https://2023.antflix.net#225.6(B)

Chapter 2 Wiring and Protection

225.10

The installation of outside wiring on surfaces of buildings (or other structures) shall be permitted for circuits not exceeding 1000 volts, nominal, as the following: Auxiliary guttersBuswaysCable traysCablebusElectrical metallic tubing (EMT)Flexible metal conduit (FMC)Intermediate metal conduit (IMC)Liquidtight flexible metal conduit (LFMC)Liquidtight flexible nonmetallic conduit (LFNC)Messenger-supported wiringOpen wiring on insulatorsReinforced thermosetting resin conduit (RTRC)Rigid metal conduit (RMC)Rigid polyvinyl chloride conduit (PVC)Type MC cableType MI cableType SE cableType TC-ER cableType UF cableWireways [225.10](https://2023.antflix.net#225.10)

https://2023.antflix.net#225.10

Chapter 2 Wiring and Protection

225.11

Feeder and branch-circuit conductors entering or exiting buildings or structures shall be installed in accordance with 230.52. Overhead branch circuits and feeders attached to buildings or structures shall be installed in accordance with 230.54. [225.11](https://2023.antflix.net#225.11)

https://2023.antflix.net#225.11

Chapter 2 Wiring and Protection

225.12

Open conductors shall be supported on knobs, racks, brackets, or strain insulators, that are made of glass, porcelain, or other approved materials. [225.12](https://2023.antflix.net#225.12)

https://2023.antflix.net#225.12

Chapter 2 Wiring and Protection

225.14

Conductors shall comply with the spacings provided in Table 230.51 (C). [225.14](https://2023.antflix.net#225.14)

https://2023.antflix.net#225.14

Chapter 2 Wiring and Protection

225.14(A)

Open conductors shall be separated from open conductors of other circuits or systems by not less than 100 mm (4 in.). [225.14(A)](https://2023.antflix.net#225.14(A))

https://2023.antflix.net#225.14(A)

Chapter 2 Wiring and Protection

225.14(B)

Conductors on poles shall have a separation of not less than 300 mm (1 ft) where not placed on racks or brackets. Conductors supported on poles shall provide a horizontal climbing space not less than the following: Power conductors below communications conductors - 750 mm (30 in.)Power conductors alone or above communications conductors:300 volts or less - 600 mm (24 in.)Over 300 volts - 750 mm (30 in.)Communications conductors below power conductors - same as power conductorsCommunications conductors alone - no requirement [225.14(B)](https://2023.antflix.net#225.14(B))

https://2023.antflix.net#225.14(B)

Chapter 2 Wiring and Protection

225.15

Outside branch-circuit and feeder conductors passing over a building shall be securely supported. [225.15](https://2023.antflix.net#225.15)

https://2023.antflix.net#225.15

Chapter 2 Wiring and Protection

225.16(A)

The point of attachment to a building shall be in accordance with 230.26. [225.16(A)](https://2023.antflix.net#225.16(A))

https://2023.antflix.net#225.16(A)

Chapter 2 Wiring and Protection

225.16(B)

The means of attachment to a building shall be in accordance with 230.27. [225.16(B)](https://2023.antflix.net#225.16(B))

https://2023.antflix.net#225.16(B)

Chapter 2 Wiring and Protection

225.17

Only feeder or branch-circuit conductors specified within this section shall be permitted to be attached to the feeder and/or branch-circuit mast. Masts used for the support of final spans of feeders or branch circuits shall be installed in accordance with 225.17(A) and (B). [225.17](https://2023.antflix.net#225.17)

https://2023.antflix.net#225.17

Chapter 2 Wiring and Protection

225.17(A)

The mast shall have adequate strength or be supported by braces or guy wires to safely withstand the strain imposed by the overhead feeder or branch-circuit conductors. Hubs intended for use with a conduit serving as a mast for support of feeder or branch-circuit conductors shall be identified for use with a mast. [225.17(A)](https://2023.antflix.net#225.17(A))

https://2023.antflix.net#225.17(A)

Chapter 2 Wiring and Protection

225.17(B)

Feeder and/or branch-circuit conductors shall not be attached to a mast where the connection is between a weatherhead or the end of the conduit and a coupling where the coupling is located above the last point of securement to the building or other structure, or where the coupling is located above the building or other structure. [225.17(B)](https://2023.antflix.net#225.17(B))

https://2023.antflix.net#225.17(B)

Chapter 2 Wiring and Protection

225.18

Overhead spans of open conductors and open multiconductor cables of not over 1000 volts, nominal, shall have a clearance of not less than the following: 3.0 m (10 ft) - above finished grade, sidewalks, or from any platform or projection that will permit personal contact where the voltage does not exceed 150 volts to ground and accessible to pedestrians only3.7 m (12 ft) - over residential property and driveways, and those commercial areas not subject to truck traffic where the voltage does not exceed 300 volts to ground4.5 m (15 ft) - for those areas listed in the 3.7 m (12 ft) classification where the voltage exceeds 300 volts to ground5.5 m (18 ft) - over public streets, alleys, roads, parking areas subject to truck traffic, driveways on other than residential property, and other land traversed by vehicles, such as cultivated, grazing, forest, and orchard7.5 m (241/2 ft) - over track rails of railroads [225.18](https://2023.antflix.net#225.18)

https://2023.antflix.net#225.18

Chapter 2 Wiring and Protection

225.19

Overhead spans of open conductors and open multiconductor cables shall comply with 225.19(A), (B), (C), and (D). [225.19](https://2023.antflix.net#225.19)

https://2023.antflix.net#225.19

Chapter 2 Wiring and Protection

225.19(A)

Overhead spans of open conductors and open multiconductor cables shall have a vertical clearance of not less than 2.6 m (8 ft 6 in.) above the roof surface. The vertical clearance above the roof level shall be maintained for a distance not less than 900 mm (3 ft) in all directions from the edge of the roof. Exception No. 1: The area above a roof surface subject to pedestrian or vehicular traffic shall have a vertical clearance from the roof surface in accordance with the clearance requirements of 225.18. Exception No. 2: Where the voltage between conductors does not exceed 300, and the roof has a slope of 100 mm in 300 mm (4 in. in 12 in.) or greater, a reduction in clearance to 900 mm (3 ft) shall be permitted. Exception No. 3: Where the voltage between conductors does not exceed 300, a reduction in clearance above only the overhanging portion of the roof to not less than 450 mm (18 in.) shall be permitted if (1) not more than 1.8 m (6 ft) of the conductors, 1.2 m (4 ft) horizontally, pass above the roof overhang, and (2) they are terminated at a through-the-roof raceway or approved support. Exception No. 4: The requirement for maintaining the vertical clearance 900 mm (3 ft) from the edge of the roof shall not apply to the final conductor span where the conductors are attached to the side of a building. [225.19(A)](https://2023.antflix.net#225.19(A))

https://2023.antflix.net#225.19(A)

Chapter 2 Wiring and Protection

225.19(B)

From signs, chimneys, radio and television antennas, tanks, and other nonbuilding or nonbridge structures, clearances - vertical, diagonal, and horizontal - shall not be less than 900 mm (3 ft). [225.19(B)](https://2023.antflix.net#225.19(B))

https://2023.antflix.net#225.19(B)

Chapter 2 Wiring and Protection

225.19(C)

Clearances shall not be less than 900 mm (3 ft). [225.19(C)](https://2023.antflix.net#225.19(C))

https://2023.antflix.net#225.19(C)

Chapter 2 Wiring and Protection

225.19(D)

Final spans of feeders or branch circuits shall comply with 225.19(D)(1), (D)(2), and (D)(3). [225.19(D)](https://2023.antflix.net#225.19(D))

https://2023.antflix.net#225.19(D)

Chapter 2 Wiring and Protection

225.19(D)(1)

Final spans to the building they supply, or from which they are fed, shall be permitted to be attached to the building, but they shall be kept not less than 900 mm (3 ft) from windows that are designed to be opened, and from doors, porches, balconies, ladders, stairs, fire escapes, or similar locations. Exception: Conductors run above the top level of a window shall be permitted to be less than the 900 mm (3 ft) requirement. [225.19(D)(1)](https://2023.antflix.net#225.19(D)(1))

https://2023.antflix.net#225.19(D)(1)

Chapter 2 Wiring and Protection

225.19(D)(2)

The vertical clearance of final spans above or within 900 mm (3 ft) measured horizontally of platforms, projections, or surfaces that will permit personal contact shall be maintained in accordance with 225.18. [225.19(D)(2)](https://2023.antflix.net#225.19(D)(2))

https://2023.antflix.net#225.19(D)(2)

Chapter 2 Wiring and Protection

225.19(D)(3)

The overhead branch-circuit and feeder conductors shall not be installed beneath openings through which materials may be moved, such as openings in farm and commercial buildings, and shall not be installed where they obstruct entrance to these openings. [225.19(D)(3)](https://2023.antflix.net#225.19(D)(3))

https://2023.antflix.net#225.19(D)(3)

Chapter 2 Wiring and Protection

225.19(E)

Where buildings exceed three stories or 15 m (50 ft) in height, overhead lines shall be arranged, where practicable, so that a clear space (or zone) at least 1.8 m (6 ft) wide will be left either adjacent to the buildings or beginning not over 2.5 m (8 ft) from them to facilitate the raising of ladders when necessary for fire fighting. [225.19(E)](https://2023.antflix.net#225.19(E))

https://2023.antflix.net#225.19(E)

Chapter 2 Wiring and Protection

225.20

Conductors installed on buildings, structures, or poles shall be protected against physical damage as provided for services in 230.50. [225.20](https://2023.antflix.net#225.20)

https://2023.antflix.net#225.20

Chapter 2 Wiring and Protection

225.21

Supports for multiconductor cables on exterior surfaces of buildings (or other structures) shall be as provided in 230.51. [225.21](https://2023.antflix.net#225.21)

https://2023.antflix.net#225.21

Chapter 2 Wiring and Protection

225.22

Raceways on exteriors of buildings or other structures shall be arranged to drain and shall be listed or approved for use in wet locations. [225.22](https://2023.antflix.net#225.22)

https://2023.antflix.net#225.22

Chapter 2 Wiring and Protection

225.24

Where outdoor lampholders are attached as pendants, the connections to the circuit wires shall be staggered. Where such lampholders have terminals of a type that puncture the insulation and make contact with the conductors, they shall be attached only to conductors of the stranded type. [225.24](https://2023.antflix.net#225.24)

https://2023.antflix.net#225.24

Chapter 2 Wiring and Protection

225.25

Locations of lamps for outdoor lighting shall be below all energized conductors, transformers, or other electric utilization equipment, unless either of the following apply: Clearances or other safeguards are provided for relamping operations.Equipment is controlled by a disconnecting means that is lockable open in accordance with 110.25. [225.25](https://2023.antflix.net#225.25)

https://2023.antflix.net#225.25

Chapter 2 Wiring and Protection

225.26

Vegetation such as trees shall not be used for support of overhead conductor spans. [225.26](https://2023.antflix.net#225.26)

https://2023.antflix.net#225.26

Chapter 2 Wiring and Protection

225.27

Where a raceway enters a building or structure from outside, it shall be sealed in accordance with 300.5(G) and 300.7(A). Spare or unused raceways shall also be sealed. Sealants shall be identified for use with cable insulation, conductor insulation, bare conductor, shield, or other components. [225.27](https://2023.antflix.net#225.27)

https://2023.antflix.net#225.27

Chapter 2 Wiring and Protection

225.30

A building or other structure that is served by a branch circuit or feeder on the load side of a service disconnecting means shall be supplied by only one feeder or branch circuit unless permitted in 225.30(A) through (F). For the purpose of this section, a multiwire branch circuit shall be considered a single circuit. Where a branch circuit or feeder originates in these additional buildings or other structures, only one feeder or branch circuit shall be permitted to supply power back to the original building or structure, unless permitted in 225.30(A) through (F). [225.30](https://2023.antflix.net#225.30)

https://2023.antflix.net#225.30

Chapter 2 Wiring and Protection

225.30(A)

Additional feeders or branch circuits shall be permitted to supply the following: Fire pumpsEmergency systemsLegally required standby systemsOptional standby systemsParallel power production systemsSystems designed for connection to multiple sources of supply for the purpose of enhanced reliabilityElectric vehicle power transfer systems listed, labeled, and identified for more than a single branch circuit or feederDocking facilities and piers [225.30(A)](https://2023.antflix.net#225.30(A))

https://2023.antflix.net#225.30(A)

Chapter 2 Wiring and Protection

225.30(B)

Where feeder conductors originate in the same panelboard, switchboard, or other distribution equipment, and each feeder terminates in a single disconnecting means, not more than six feeders shall be permitted. Where more than one feeder is installed in accordance with this section, all feeder disconnects supplying the building or structure shall be grouped in the same location, and the requirements of 225.33 shall not apply. Each disconnect shall be marked to indicate the load served. [225.30(B)](https://2023.antflix.net#225.30(B))

https://2023.antflix.net#225.30(B)

Chapter 2 Wiring and Protection

225.30(C)

By special permission, additional feeders or branch circuits shall be permitted for either of the following: Multiple-occupancy buildings where there is no space available for supply equipment accessible to all occupantsA single building or other structure sufficiently large to make two or more supplies necessary [225.30(C)](https://2023.antflix.net#225.30(C))

https://2023.antflix.net#225.30(C)

Chapter 2 Wiring and Protection

225.30(D)

Additional feeders or branch circuits shall be permitted where the capacity requirements are in excess of 2000 amperes at a supply voltage of 1000 volts or less. [225.30(D)](https://2023.antflix.net#225.30(D))

https://2023.antflix.net#225.30(D)

Chapter 2 Wiring and Protection

225.30(E)

Additional feeders or branch circuits shall be permitted for different voltages, frequencies, or phases, or for different uses such as control of outside lighting from multiple locations. [225.30(E)](https://2023.antflix.net#225.30(E))

https://2023.antflix.net#225.30(E)

Chapter 2 Wiring and Protection

225.30(F)

Additional feeders or branch circuits shall be permitted to supply installations under single management where documented safe switching procedures are established and maintained. [225.30(F)](https://2023.antflix.net#225.30(F))

https://2023.antflix.net#225.30(F)

Chapter 2 Wiring and Protection

225.31(A)

Means shall be provided for disconnecting all ungrounded conductors that supply or pass through the building or structure. [225.31(A)](https://2023.antflix.net#225.31(A))

https://2023.antflix.net#225.31(A)

Chapter 2 Wiring and Protection

225.31(B)

The disconnecting means shall be installed either inside or outside of the building or structure served or where the conductors pass through the building or structure. The disconnecting means shall be at a readily accessible location nearest the point of entrance of the conductors. For the purposes of this section, the requirements in 230.6 shall apply. Exception No. 1: For installations under single management, where documented safe switching procedures are established and maintained, and where the installation is monitored by qualified individuals, the disconnecting means shall be permitted to be located elsewhere on the premises. Exception No. 2: For buildings or other structures qualifying under 685.1, the disconnecting means shall be permitted to be located elsewhere on the premises. Exception No. 3: For towers or poles used as lighting standards, the disconnecting means shall be permitted to be located elsewhere on the premises. Exception No. 4: For poles or similar structures used only for support of signs installed in accordance with 600.1, the disconnecting means shall be permitted to be located elsewhere on the premises. [225.31(B)](https://2023.antflix.net#225.31(B))

https://2023.antflix.net#225.31(B)

Chapter 2 Wiring and Protection

225.33(A)

The disconnecting means for each supply permitted by 225.30 shall consist of not more than six switches or six circuit breakers mounted in a single enclosure, in a group of separate enclosures, or in or on a switchboard or switchgear. There shall be no more than six disconnects per supply grouped in any one location. Exception: For the purposes of this section, disconnecting means used solely for the control circuit of the ground-fault protection system, or the control circuit of the power-operated supply disconnecting means, installed as part of the listed equipment, shall not be considered a supply disconnecting means. [225.33(A)](https://2023.antflix.net#225.33(A))

https://2023.antflix.net#225.33(A)

Chapter 2 Wiring and Protection

225.33(B)

Two or three single-pole switches or breakers capable of individual operation shall be permitted on multiwire circuits, one pole for each ungrounded conductor, as one multipole disconnect, provided they are equipped with identified handle ties or a master handle to disconnect all ungrounded conductors with no more than six operations of the hand. [225.33(B)](https://2023.antflix.net#225.33(B))

https://2023.antflix.net#225.33(B)

Chapter 2 Wiring and Protection

225.34(A)

The two to six disconnects as permitted in 225.33 shall be grouped. Each disconnect shall be marked to indicate the load served. Exception: One of the two to six disconnecting means permitted in 225.33, where used only for a water pump also intended to provide fire protection, shall be permitted to be located remote from the other disconnecting means. [225.34(A)](https://2023.antflix.net#225.34(A))

https://2023.antflix.net#225.34(A)

Chapter 2 Wiring and Protection

225.34(B)

The one or more additional disconnecting means for fire pumps or for emergency, legally required standby or optional standby system permitted by 225.30 shall be installed sufficiently remote from the one to six disconnecting means for normal supply to minimize the possibility of simultaneous interruption of supply. [225.34(B)](https://2023.antflix.net#225.34(B))

https://2023.antflix.net#225.34(B)

Chapter 2 Wiring and Protection

225.35

In a multiple-occupancy building, each occupant shall have access to the occupant's supply disconnecting means. Exception: In a multiple-occupancy building where electric supply and electrical maintenance are provided by the building management and where these are under continuous building management supervision, the supply disconnecting means supplying more than one occupancy shall be permitted to be accessible to authorized management personnel only. [225.35](https://2023.antflix.net#225.35)

https://2023.antflix.net#225.35

Chapter 2 Wiring and Protection

225.36

The disconnecting means specified in 225.31 shall be a circuit breaker, molded case switch, general-use switch, snap switch, or other approved means. Where applied in accordance with 250.32(B)(1), Exception No. 1, the disconnecting means shall be suitable for use as service equipment. [225.36](https://2023.antflix.net#225.36)

https://2023.antflix.net#225.36

Chapter 2 Wiring and Protection

225.37

Where a building or structure has any combination of feeders, branch circuits, or services passing through it or supplying it, a permanent plaque or directory shall be installed at each feeder and branch-circuit disconnect location denoting all other services, feeders, or branch circuits supplying that building or structure or passing through that building or structure and the area served by each. Exception No. 1: A plaque or directory shall not be required for large-capacity multibuilding industrial installations under single management, where it is ensured that disconnection can be accomplished by establishing and maintaining safe switching procedures. Exception No. 2: This identification shall not be required for branch circuits installed from a dwelling unit to a second building or structure. [225.37](https://2023.antflix.net#225.37)

https://2023.antflix.net#225.37

Chapter 2 Wiring and Protection

225.38

Disconnecting means shall meet the requirements of 225.38(A) through (D). [225.38](https://2023.antflix.net#225.38)

https://2023.antflix.net#225.38

Chapter 2 Wiring and Protection

225.38(A)

The disconnecting means shall consist of either (1) a manually operable switch or a circuit breaker equipped with a handle or other suitable operating means or (2) a power-operable switch or circuit breaker, provided the switch or circuit breaker can be opened by hand in the event of a power failure. [225.38(A)](https://2023.antflix.net#225.38(A))

https://2023.antflix.net#225.38(A)

Chapter 2 Wiring and Protection

225.38(B)

Each building or structure disconnecting means shall simultaneously disconnect all ungrounded supply conductors that it controls from the building or structure wiring system. [225.38(B)](https://2023.antflix.net#225.38(B))

https://2023.antflix.net#225.38(B)

Chapter 2 Wiring and Protection

225.38(C)

Where the building or structure disconnecting means does not disconnect the grounded conductor from the grounded conductors in the building or structure wiring, other means shall be provided for this purpose at the location of the disconnecting means. A terminal or bus to which all grounded conductors can be attached by means of pressure connectors shall be permitted for this purpose. In a multisection switchboard or switchgear, disconnects for the grounded conductor shall be permitted to be in any section of the switchboard or switchgear, if the switchboard section or switchgear section is marked to indicate a grounded conductor disconnect is contained within the equipment. [225.38(C)](https://2023.antflix.net#225.38(C))

https://2023.antflix.net#225.38(C)

Chapter 2 Wiring and Protection

225.38(D)

The building or structure disconnecting means shall plainly indicate whether it is in the open or closed position. [225.38(D)](https://2023.antflix.net#225.38(D))

https://2023.antflix.net#225.38(D)

Chapter 2 Wiring and Protection

225.39

The feeder or branch-circuit disconnecting means shall have a rating of not less than the calculated load to be supplied, determined in accordance with Parts I and II of Article 220 for branch circuits, Part III or IV of Article 220 for feeders, or Part V of Article 220 for farm loads. Where the branch circuit or feeder disconnecting means consists of more than one switch or circuit breaker, as permitted by 225.33, combining the ratings of all the switches or circuit breakers for determining the rating of the disconnecting means shall be permitted. In no case shall the rating be lower than specified in 225.39(A), (B), (C), or (D). [225.39](https://2023.antflix.net#225.39)

https://2023.antflix.net#225.39

Chapter 2 Wiring and Protection

225.39(A)

For installations to supply only limited loads of a single branch circuit, the branch circuit disconnecting means shall have a rating of not less than 15 amperes. [225.39(A)](https://2023.antflix.net#225.39(A))

https://2023.antflix.net#225.39(A)

Chapter 2 Wiring and Protection

225.39(B)

For installations consisting of not more than two 2-wire branch circuits, the feeder or branch-circuit disconnecting means shall have a rating of not less than 30 amperes. [225.39(B)](https://2023.antflix.net#225.39(B))

https://2023.antflix.net#225.39(B)

Chapter 2 Wiring and Protection

225.39(C)

For a one-family dwelling, the feeder disconnecting means shall have a rating of not less than 100 amperes, 3-wire. [225.39(C)](https://2023.antflix.net#225.39(C))

https://2023.antflix.net#225.39(C)

Chapter 2 Wiring and Protection

225.39(D)

For all other installations, the feeder or branch-circuit disconnecting means shall have a rating of not less than 60 amperes. [225.39(D)](https://2023.antflix.net#225.39(D))

https://2023.antflix.net#225.39(D)