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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 th... | 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 (%) ... | 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 ... | 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 ... | 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#... | 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... | 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 fe... | 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... | 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... | 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... | 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... | 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) fo... | 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-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 ... | 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 ... | 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 dwel... | 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 t... | 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... | 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... | 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 ... | 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 uni... | 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 % ... | 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)(... | 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... | 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... | 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 req... | 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 th... | 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 Lo... | 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 func... | 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 defi... | 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 ... | 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 build... | 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... | 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 locati... | 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 ... | 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 flexib... | 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 communi... | 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... | 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... | 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 gr... | 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 N... | 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: Cond... | 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 f... | 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.ne... | 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 acc... | 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.an... | 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.... | 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 powe... | 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 ... | 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.... | 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... | 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. E... | 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... | 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 fr... | 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. [22... | 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 s... | 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#... | 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 stru... | 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:... | 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 b... | 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 feede... | 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) |
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