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Chapter 4 Equipment for General Use | 430.109 | The disconnecting means shall be a type in accordance with 430.109(A), unless otherwise permitted in 430.109(B) through (G), under the conditions specified. [430.109](https://2023.antflix.net#430.109) | https://2023.antflix.net#430.109 |
Chapter 4 Equipment for General Use | 430.109(A)(1) | A listed motor-circuit switch rated in horsepower. [430.109(A)(1)](https://2023.antflix.net#430.109(A)(1)) | https://2023.antflix.net#430.109(A)(1) |
Chapter 4 Equipment for General Use | 430.109(A)(2) | A listed molded case circuit breaker. [430.109(A)(2)](https://2023.antflix.net#430.109(A)(2)) | https://2023.antflix.net#430.109(A)(2) |
Chapter 4 Equipment for General Use | 430.109(A)(3) | A listed molded case switch. [430.109(A)(3)](https://2023.antflix.net#430.109(A)(3)) | https://2023.antflix.net#430.109(A)(3) |
Chapter 4 Equipment for General Use | 430.109(A)(4) | An instantaneous-trip circuit breaker that is part of a listed combination motor controller. [430.109(A)(4)](https://2023.antflix.net#430.109(A)(4)) | https://2023.antflix.net#430.109(A)(4) |
Chapter 4 Equipment for General Use | 430.109(A)(5) | Listed self-protected combination motor controller. [430.109(A)(5)](https://2023.antflix.net#430.109(A)(5)) | https://2023.antflix.net#430.109(A)(5) |
Chapter 4 Equipment for General Use | 430.109(A)(6) | Listed manual motor controllers additionally marked "Suitable as Motor Disconnect" shall be permitted as a disconnecting means where installed between the final motor branch-circuit short-circuit protective device and the motor. Listed manual motor controllers additionally marked "Suitable as Motor Disconnect" shall be... | https://2023.antflix.net#430.109(A)(6) |
Chapter 4 Equipment for General Use | 430.109(A)(7) | System isolation equipment shall be listed for disconnection purposes. System isolation equipment shall be installed on the load side of the overcurrent protection and its disconnecting means. The disconnecting means shall be one of the types permitted by 430.109(A)(1) through (A)(3). [430.109(A)(7)](https://2023.antfl... | https://2023.antflix.net#430.109(A)(7) |
Chapter 4 Equipment for General Use | 430.109(B) | For stationary motors of 1/8 hp or less, the branch-circuit overcurrent device shall be permitted to serve as the disconnecting means. [430.109(B)](https://2023.antflix.net#430.109(B)) | https://2023.antflix.net#430.109(B) |
Chapter 4 Equipment for General Use | 430.109(C) | For stationary motors rated at 2 hp or less and 300 volts or less, the disconnecting means shall be permitted to be one of the following devices: A general-use switch having an ampere rating not less than twice the full-load current rating of the motorOn ac circuits, a general-use snap switch suitable only for use on a... | https://2023.antflix.net#430.109(C) |
Chapter 4 Equipment for General Use | 430.109(D) | For motors of over 2 hp up to and including 100 hp, the separate disconnecting means required for a motor with an autotransformer-type motor controller shall be permitted to be a general-use switch where all of the following provisions are met: The motor drives a generator that is provided with overload protection.The ... | https://2023.antflix.net#430.109(D) |
Chapter 4 Equipment for General Use | 430.109(E) | For stationary motors rated at more than 40 hp dc or 100 hp ac, the disconnecting means shall be permitted to be a general-use or isolating switch where plainly marked "Do not operate under load." [430.109(E)](https://2023.antflix.net#430.109(E)) | https://2023.antflix.net#430.109(E) |
Chapter 4 Equipment for General Use | 430.109(F) | For a cord-and-plug-connected motor, a horsepower-rated attachment plug and receptacle, flanged surface inlet and cord connector, or attachment plug and cord connector having ratings not less than the motor ratings shall be permitted to serve as the disconnecting means. Horsepower-rated attachment plugs, flanged surfac... | https://2023.antflix.net#430.109(F) |
Chapter 4 Equipment for General Use | 430.109(G) | For torque motors, the disconnecting means shall be permitted to be a general-use switch. [430.109(G)](https://2023.antflix.net#430.109(G)) | https://2023.antflix.net#430.109(G) |
Chapter 4 Equipment for General Use | 430.110(A) | The disconnecting means for motor circuits rated 1000 volts, nominal, or less shall have a current rating not less than 115 percent of the full-load current rating of the motor. Exception: A listed unfused motor-circuit switch having a horsepower rating not less than the motor horsepower shall be permitted to have a cu... | https://2023.antflix.net#430.110(A) |
Chapter 4 Equipment for General Use | 430.110(B) | Disconnecting means for a torque motor shall have a current rating of at least 115 percent of the motor nameplate current. [430.110(B)](https://2023.antflix.net#430.110(B)) | https://2023.antflix.net#430.110(B) |
Chapter 4 Equipment for General Use | 430.110(C) | Where two or more motors are used together or where one or more motors are used in combination with other loads, such as resistance heaters, and where the combined load can be simultaneous on a single disconnecting means, the current and horsepower ratings of the combined load shall be determined in accordance with 430... | https://2023.antflix.net#430.110(C) |
Chapter 4 Equipment for General Use | 430.110(C)(1) | The rating of the disconnecting means shall be determined from the sum of all currents, including resistance loads, at the full-load condition and also at the locked-rotor condition. The combined full-load current and the combined locked-rotor current so obtained shall be considered as a single motor for the purpose of... | https://2023.antflix.net#430.110(C)(1) |
Chapter 4 Equipment for General Use | 430.110(C)(2) | The current rating of the disconnecting means shall not be less than 115 percent of the sum of all currents at the full-load condition determined in accordance with 430.110(C)(1). Exception: A listed nonfused motor-circuit switch having a horsepower rating equal to or greater than the equivalent horsepower of the combi... | https://2023.antflix.net#430.110(C)(2) |
Chapter 4 Equipment for General Use | 430.110(C)(3) | For small motors not covered by Table 430.247, Table 430.248, Table 430.249, or Table 430.250, the locked-rotor current shall be assumed to be six times the full-load current. [430.110(C)(3)](https://2023.antflix.net#430.110(C)(3)) | https://2023.antflix.net#430.110(C)(3) |
Chapter 4 Equipment for General Use | 430.111 | A switch or circuit breaker shall be permitted to be used as both the motor controller and disconnecting means if it complies with 430.111(A) and is one of the types specified in 430.111 (B). [430.111](https://2023.antflix.net#430.111) | https://2023.antflix.net#430.111 |
Chapter 4 Equipment for General Use | 430.111(A) | The switch or circuit breaker complies with the requirements for motor controllers specified in 430.83, opens all ungrounded conductors to the motor, and is protected by an overcurrent device in each ungrounded conductor (which shall be permitted to be the branch-circuit fuses). The overcurrent device protecting the mo... | https://2023.antflix.net#430.111(A) |
Chapter 4 Equipment for General Use | 430.111(B) | The device shall be one of the types specified in 430.111(B)(1), (B)(2), or (B)(3). [430.111(B)](https://2023.antflix.net#430.111(B)) | https://2023.antflix.net#430.111(B) |
Chapter 4 Equipment for General Use | 430.111(B)(1) | An air-break switch, operable directly by applying the hand to a lever or handle. [430.111(B)(1)](https://2023.antflix.net#430.111(B)(1)) | https://2023.antflix.net#430.111(B)(1) |
Chapter 4 Equipment for General Use | 430.111(B)(2) | An inverse time circuit breaker operable directly by applying the hand to a lever or handle. The circuit breaker shall be permitted to be both power-operable and manually operable. [430.111(B)(2)](https://2023.antflix.net#430.111(B)(2)) | https://2023.antflix.net#430.111(B)(2) |
Chapter 4 Equipment for General Use | 430.111(B)(3) | An oil switch used on a circuit whose rating does not exceed 1000 volts or 100 amperes, or by special permission on a circuit exceeding this capacity where under expert supervision. The oil switch shall be permitted to be both power-operable and manually operable. [430.111(B)(3)](https://2023.antflix.net#430.111(B)(3)) | https://2023.antflix.net#430.111(B)(3) |
Chapter 4 Equipment for General Use | 430.112 | Each motor shall be provided with an individual disconnecting means. Exception: A single disconnecting means shall be permitted to serve a group of motors under any one of the conditions of (1), (2), and (3). The single disconnecting means shall be rated in accordance with 430.110(C). (1) Where a number of motors drive... | https://2023.antflix.net#430.112 |
Chapter 4 Equipment for General Use | 430.113 | Motor and motor-operated equipment receiving electric energy from more than one source shall be provided with disconnecting means from each source of electric energy immediately adjacent to the equipment served. Each source shall be permitted to have a separate disconnecting means. Where multiple disconnecting means ar... | https://2023.antflix.net#430.113 |
Chapter 4 Equipment for General Use | 430.120 | The installation requirements for Part I through Part IX are applicable unless modified or supplemented by Part X. Power conversion equipment used in adjustable-speed drive systems shall comply with Part X for an input or output rated 1000 volts or lower and with Part XI for an input or output rated over 1000 volts. [4... | https://2023.antflix.net#430.120 |
Chapter 4 Equipment for General Use | 430.122(A) | Circuit conductors supplying power conversion equipment included as part of an adjustable-speed drive system shall have an ampacity not less than 125 percent of the rated input current to the power conversion equipment. Informational Note: Power conversion equipment can have multiple power ratings and corresponding inp... | https://2023.antflix.net#430.122(A) |
Chapter 4 Equipment for General Use | 430.122(B) | The conductors between the power conversion equipment and the motor shall have an ampacity equal to or larger than 125 percent of the motor full-load current as determined by 430.6(A) or (B). Exception: If the power conversion equipment is listed and marked as "Suitable for Output Motor Conductor Protection," the condu... | https://2023.antflix.net#430.122(B) |
Chapter 4 Equipment for General Use | 430.122(C) | The ampacity of circuit conductors supplying power conversion equipment included as part of an adjustable-speed drive system that utilizes a bypass device shall be the larger of either of the following: 125 percent of the rated input current to the power conversion equipment125 percent of the motor full-load current ra... | https://2023.antflix.net#430.122(C) |
Chapter 4 Equipment for General Use | 430.122(D) | Conductors supplying several motors or a motor and other loads, including power conversion equipment, shall have ampacity in accordance with 430.24, using the rated input current of the power conversion equipment for purposes of calculating ampacity. [430.122(D)](https://2023.antflix.net#430.122(D)) | https://2023.antflix.net#430.122(D) |
Chapter 4 Equipment for General Use | 430.124 | Overload protection of the motor shall be provided. [430.124](https://2023.antflix.net#430.124) | https://2023.antflix.net#430.124 |
Chapter 4 Equipment for General Use | 430.124(A) | Where the power conversion equipment is marked to indicate that motor overload protection is included, additional overload protection shall not be required. [430.124(A)](https://2023.antflix.net#430.124(A)) | https://2023.antflix.net#430.124(A) |
Chapter 4 Equipment for General Use | 430.124(B) | For adjustable-speed drive systems that utilize a bypass device to allow motor operation at rated full-load speed, motor overload protection as described in Article 430, Part III, shall be provided in the bypass circuit. [430.124(B)](https://2023.antflix.net#430.124(B)) | https://2023.antflix.net#430.124(B) |
Chapter 4 Equipment for General Use | 430.124(C) | For multiple motor application, individual motor overload protection shall be provided in accordance with Article 430, Part III. [430.124(C)](https://2023.antflix.net#430.124(C)) | https://2023.antflix.net#430.124(C) |
Chapter 4 Equipment for General Use | 430.126(A) | Adjustable-speed drive systems shall protect against motor overtemperature conditions where the motor is not rated to operate at the nameplate rated current over the speed range required by the application. This protection shall be provided in addition to the conductor protection required in 430.32. Protection shall be... | https://2023.antflix.net#430.126(A) |
Chapter 4 Equipment for General Use | 430.126(B) | For multiple motor applications, individual motor overtemperature protection shall be provided as required in 430.126(A). [430.126(B)](https://2023.antflix.net#430.126(B)) | https://2023.antflix.net#430.126(B) |
Chapter 4 Equipment for General Use | 430.126(C) | 430.43 and 430.44 shall apply to the motor overtemperature protection means. [430.126(C)](https://2023.antflix.net#430.126(C)) | https://2023.antflix.net#430.126(C) |
Chapter 4 Equipment for General Use | 430.128 | The disconnecting means shall be permitted to be in the incoming line to the conversion equipment and shall have a rating not less than 115 percent of the rated input current of the conversion unit. [430.128](https://2023.antflix.net#430.128) | https://2023.antflix.net#430.128 |
Chapter 4 Equipment for General Use | 430.130(A) | Circuits containing power conversion equipment shall be protected by a branch-circuit short-circuit and ground-fault protective device in accordance with all of the following: The rating and type of protection shall be determined by 430.52(C)(1), (C)(3), (C)(5), or (C)(6), using the full-load current rating of the moto... | https://2023.antflix.net#430.130(A) |
Chapter 4 Equipment for General Use | 430.130(B) | Branch-circuit short-circuit and ground-fault protection shall also be provided for a bypass circuit/device(s). Where a single branch-circuit short-circuit and ground-fault protective device is provided for circuits containing both power conversion equipment and a bypass circuit, the branch-circuit protective device ty... | https://2023.antflix.net#430.130(B) |
Chapter 4 Equipment for General Use | 430.131 | For installations meeting all the requirements of 430.53 that include one or more power converters, the branch-circuit short-circuit and ground-fault protective fuses or inverse time circuit breakers shall be of a type and rating or setting permitted for use with the power conversion equipment using the full-load curre... | https://2023.antflix.net#430.131 |
Chapter 4 Equipment for General Use | 430.201 | Part XI recognizes the additional hazard due to the use of higher voltages. It adds to or amends the other provisions of this article. [430.201](https://2023.antflix.net#430.201) | https://2023.antflix.net#430.201 |
Chapter 4 Equipment for General Use | 430.202 | In addition to the marking required by 430.8, a motor controller shall be marked with the control voltage. [430.202](https://2023.antflix.net#430.202) | https://2023.antflix.net#430.202 |
Chapter 4 Equipment for General Use | 430.203 | Flexible metal conduit or liquidtight flexible metal conduit not exceeding 1.8 m (6 ft) in length shall be permitted to be employed for raceway connection to a motor terminal enclosure. [430.203](https://2023.antflix.net#430.203) | https://2023.antflix.net#430.203 |
Chapter 4 Equipment for General Use | 430.204 | Motor controllers rated over 1000 volts shall provide wire-bending space within the enclosure for conductors installed in accordance with 305.5. [430.204](https://2023.antflix.net#430.204) | https://2023.antflix.net#430.204 |
Chapter 4 Equipment for General Use | 430.205 | The ampacities of conductors supplying equipment rated over 1000 volts, nominal, shall be determined in accordance with 315.60 or 430.205(A) and (B). [430.205](https://2023.antflix.net#430.205) | https://2023.antflix.net#430.205 |
Chapter 4 Equipment for General Use | 430.205(A) | Conductors supplying motors shall be sized not less than the current trip setting of the motor overload protective device(s). [430.205(A)](https://2023.antflix.net#430.205(A)) | https://2023.antflix.net#430.205(A) |
Chapter 4 Equipment for General Use | 430.205(B) | For an adjustable-speed drive system, the conductors supplying the power conversion equipment shall have an ampacity not less than 125 percent of the rated input current to the power conversion equipment. [430.205(B)](https://2023.antflix.net#430.205(B)) | https://2023.antflix.net#430.205(B) |
Chapter 4 Equipment for General Use | 430.206(A) | Each motor circuit shall include coordinated protection to automatically interrupt overload and fault currents in the motor, the motor-circuit conductors, and the motor control apparatus. Adjustable-speed drive systems with input or output voltages over 1000 volts, nominal, shall comply with 430.124 and 430.126. All ot... | https://2023.antflix.net#430.206(A) |
Chapter 4 Equipment for General Use | 430.206(B)(1) | Each motor shall be protected against dangerous heating due to motor overloads and failure to start by a thermal protector integral with the motor or external current-sensing devices, or both. Protective device settings for each motor circuit shall be determined under engineering supervision. [430.206(B)(1)](https://20... | https://2023.antflix.net#430.206(B)(1) |
Chapter 4 Equipment for General Use | 430.206(B)(2) | The secondary circuits of wound-rotor ac motors, including conductors, motor controllers, and resistors rated for the application, shall be considered as protected against overcurrent by the motor overload protection means. [430.206(B)(2)](https://2023.antflix.net#430.206(B)(2)) | https://2023.antflix.net#430.206(B)(2) |
Chapter 4 Equipment for General Use | 430.206(B)(3) | Operation of the overload interrupting device shall simultaneously disconnect all ungrounded conductors. [430.206(B)(3)](https://2023.antflix.net#430.206(B)(3)) | https://2023.antflix.net#430.206(B)(3) |
Chapter 4 Equipment for General Use | 430.206(B)(4) | Overload sensing devices shall not automatically reset after trip unless resetting of the overload sensing device does not cause automatic restarting of the motor or there is no hazard to persons created by automatic restarting of the motor and its connected machinery. [430.206(B)(4)](https://2023.antflix.net#430.206(B... | https://2023.antflix.net#430.206(B)(4) |
Chapter 4 Equipment for General Use | 430.206(C)(1) | Fault-current protection shall be provided in each motor circuit as specified by either 430.206(C)(1) (a) or (C)(1)(b). A circuit breaker of suitable type and rating arranged so that it can be serviced without hazard. The circuit breaker shall simultaneously disconnect all ungrounded conductors. The circuit breaker sha... | https://2023.antflix.net#430.206(C)(1) |
Chapter 4 Equipment for General Use | 430.206(C)(2) | Fault-current interrupting devices shall not automatically reclose the circuit. Exception: Automatic reclosing of a circuit shall be permitted where the circuit is exposed to transient faults and where such automatic reclosing does not create a hazard to persons. [430.206(C)(2)](https://2023.antflix.net#430.206(C)(2)) | https://2023.antflix.net#430.206(C)(2) |
Chapter 4 Equipment for General Use | 430.206(C)(3) | Overload protection and fault-current protection shall be permitted to be provided by the same device. [430.206(C)(3)](https://2023.antflix.net#430.206(C)(3)) | https://2023.antflix.net#430.206(C)(3) |
Chapter 4 Equipment for General Use | 430.207 | The ultimate trip current of overcurrent (overload) relays or other motor-protective devices used shall not exceed 115 percent of the motor controller's continuous current rating. Where the motor branch-circuit disconnecting means is separate from the motor controller, the disconnecting means current rating shall not b... | https://2023.antflix.net#430.207 |
Chapter 4 Equipment for General Use | 430.208 | The motor controller disconnecting means shall be a switch or circuit breaker having a voltage rating not less than that of the circuit involved, and shall be lockable in accordance with 110.25. The disconnecting means shall have a current rating of not less than 100 percent of the full-load current rating of the motor... | https://2023.antflix.net#430.208 |
Chapter 4 Equipment for General Use | 430.231 | Part XII specifies that live parts shall be protected in an approved manner for the hazard involved. [430.231](https://2023.antflix.net#430.231) | https://2023.antflix.net#430.231 |
Chapter 4 Equipment for General Use | 430.232 | Exposed live parts of motors and motor controllers operating at 50 volts or more between terminals shall be guarded against accidental contact by enclosure or by location as follows: By installation in a room or enclosure that is accessible only to qualified personsBy installation on a suitable balcony, gallery, or pla... | https://2023.antflix.net#430.232 |
Chapter 4 Equipment for General Use | 430.233 | Where live parts of motors or motor controllers operating at over 50 volts to ground are guarded against accidental contact only by location as specified in 430.232, and where adjustment or other attendance could be necessary during the operation of the apparatus, suitable insulating mats or platforms shall be provided... | https://2023.antflix.net#430.233 |
Chapter 4 Equipment for General Use | 430.241 | Part XIII specifies the grounding of exposed non-current-carrying metal parts, likely to become energized, of motor and motor controller frames to limit voltage to ground in the event of accidental contact between energized parts and frames. Insulation, isolation, or guarding are suitable alternatives to grounding of m... | https://2023.antflix.net#430.241 |
Chapter 4 Equipment for General Use | 430.242 | The frames of stationary motors shall be grounded under any of the following conditions: Where supplied by metal-enclosed wiringWhere in a wet location and not isolated or guardedIf in a hazardous (classified) locationIf the motor operates with any terminal at over 150 volts to groundWhere the frame of the motor is not... | https://2023.antflix.net#430.242 |
Chapter 4 Equipment for General Use | 430.243 | The frames of portable motors that operate over 150 volts to ground shall be guarded or grounded. Informational Note No. 1: See 250.114(4) for grounding of portable appliances in other than residential occupancies. Informational Note No. 2: See 250.119(D) for color of equipment grounding conductor in flexible cords. Ex... | https://2023.antflix.net#430.243 |
Chapter 4 Equipment for General Use | 430.244 | Motor controller enclosures shall be connected to the equipment grounding conductor regardless of voltage. Motor controller enclosures shall have means for attachment of an equipment grounding conductor termination in accordance with 250.8. Exception: Enclosures attached to ungrounded portable equipment shall not be re... | https://2023.antflix.net#430.244 |
Chapter 4 Equipment for General Use | 430.245 | Connection to the equipment grounding conductor shall be done in accordance with Part VI of Article 250. [430.245](https://2023.antflix.net#430.245) | https://2023.antflix.net#430.245 |
Chapter 4 Equipment for General Use | 430.245(A) | Where the wiring to motors is metal-enclosed cable or in metal raceways, junction boxes to house motor terminals shall be provided, and the armor of the cable or the metal raceways shall be connected to them in accordance with 250.96(A) and 250.97. [430.245(A)](https://2023.antflix.net#430.245(A)) | https://2023.antflix.net#430.245(A) |
Chapter 4 Equipment for General Use | 430.245(B) | The junction box required by 430.245(A) shall be permitted to be separated from the motor by not more than 1.8 m (6 ft) if the leads to the motor are stranded conductors within Type AC cable, interlocked metal tape Type MC cable where listed and identified in accordance with 250.118(A)(10)b., or armored cord or are str... | https://2023.antflix.net#430.245(B) |
Chapter 4 Equipment for General Use | 430.245(C) | Instrument transformer secondaries and exposed non-current-carrying metal or other conductive parts or cases of instrument transformers, meters, instruments, and relays shall be grounded in accordance with 250.170 through 250.178. [430.245(C)](https://2023.antflix.net#430.245(C)) | https://2023.antflix.net#430.245(C) |
Chapter 4 Equipment for General Use | divider_0_XIV | Table 430.247 Full-Load Current in Amperes, Direct-Current MotorsThe following values of full-load currents* are for motors running at base speed. Horsepower Armature Voltage Rating* 90 Volts 120 Volts 180 Volts 240 Volts 500 Volts 550 Volts 1/4 4.0 3.1 2.0 1.6 - - 1/3 5.2 4.1 2.6 2.0 - - 1/2 6.8 5.4 3.4 2... | https://2023.antflix.net#divider_0_XIV |
Chapter 4 Equipment for General Use | 440.1 | This article applies to electric motor-driven airconditioning and refrigerating equipment and to the branch circuits and controllers for such equipment. It provides for the special considerations necessary for circuits supplying hermetic refrigerant motor-compressors and for any air-conditioning or refrigerating equipm... | https://2023.antflix.net#440.1 |
Chapter 4 Equipment for General Use | 440.4(A) | A hermetic refrigerant motor-compressor shall be provided with a nameplate that shall indicate the manufacturer's name, trademark, or symbol; identifying designation; phase; voltage; and frequency. The rated-load current in amperes of the motor-compressor shall be marked by the equipment manufacturer on either or both ... | https://2023.antflix.net#440.4(A) |
Chapter 4 Equipment for General Use | 440.4(B) | Multimotor and combination-load equipment shall be provided with a risible nameplate marked with the maker's name, the rating in volts, frequency and number of phases, minimum supply circuit conductor ampacity, the maximum rating of the branch-circuit short-circuit and ground-fault protective device, and the short-circ... | https://2023.antflix.net#440.4(B) |
Chapter 4 Equipment for General Use | 440.4(C) | A hermetic refrigerant motor-compressor, or equipment containing such a compressor, having a protection system that is approved for use with the motor-compressor that it protects and that permits continuous current in excess of the specified percentage of nameplate rated-load current given in 440.52(B)(2) or (B)(4) sha... | https://2023.antflix.net#440.4(C) |
Chapter 4 Equipment for General Use | 440.5 | A controller shall be marked with the manufacturer's name, trademark, or symbol; identifying designation; voltage; phase; full-load and locked-rotor current (or horsepower) rating; and other data as may be needed to properly indicate the motor-compressor for which it is suitable. [440.5](https://2023.antflix.net#440.5) | https://2023.antflix.net#440.5 |
Chapter 4 Equipment for General Use | 440.6 | The size of conductors for equipment covered by this article shall be selected from Table 310.16 through Table 310.19 or calculated in accordance with 310.14 as applicable. The required ampacity of conductors and rating of equipment shall be determined according to 440.6(A) and 440.6(B). [440.6](https://2023.antflix.ne... | https://2023.antflix.net#440.6 |
Chapter 4 Equipment for General Use | 440.6(A) | For a hermetic refrigerant motor-compressor, the rated-load current marked on the nameplate of the equipment in which the motor-compressor is employed shall be used in determining the rating or ampacity of the disconnecting means, the branch-circuit conductors, the controller, the branch-circuit short-circuit and groun... | https://2023.antflix.net#440.6(A) |
Chapter 4 Equipment for General Use | 440.6(B) | For multimotor equipment employing a shaded-pole or permanent split-capacitor-type fan or blower motor, the full-load current for such motor marked on the nameplate of the equipment in which the fan or blower motor is employed shall be used instead of the horsepower rating to determine the ampacity or rating of the dis... | https://2023.antflix.net#440.6(B) |
Chapter 4 Equipment for General Use | 440.7 | In determining compliance with this article and with 430.24, 430.53(B) and 430.53(C), and 430.62(A), the highest rated (largest) motor shall be considered to be the motor that has the highest rated-load current. Where two or more motors have the same highest rated-load current, only one of them shall be considered as t... | https://2023.antflix.net#440.7 |
Chapter 4 Equipment for General Use | 440.8 | An air-conditioning or refrigerating system shall be considered to be a single machine under the provisions of 430.87, Exception No. 1, and 430.112, Exception. The motors shall be permitted to be located remotely from each other. Air-conditioning and refrigeration equipment shall not be installed within a zone measured... | https://2023.antflix.net#440.8 |
Chapter 4 Equipment for General Use | 440.9 | Where equipment is installed outdoors on a roof, an equipment grounding conductor of the wire type shall be installed in outdoor portions of metallic raceway systems that use compression-type fittings. [440.9](https://2023.antflix.net#440.9) | https://2023.antflix.net#440.9 |
Chapter 4 Equipment for General Use | 440.10(A) | Motor controllers or industrial control panels of multimotor and combination-load equipment shall not be installed where the available fault current exceeds its short-circuit current rating as marked in accordance with 440.4(B). [440.10(A)](https://2023.antflix.net#440.10(A)) | https://2023.antflix.net#440.10(A) |
Chapter 4 Equipment for General Use | 440.10(B) | When motor controllers or industrial control panels of multimotor and combination-load equipment are required to be marked with a short circuit current rating, the available fault current and the date the available fault current calculation was performed shall be documented and made available to those authorized to ins... | https://2023.antflix.net#440.10(B) |
Chapter 4 Equipment for General Use | 440.11 | Disconnecting means shall be capable of disconnecting air-conditioning and refrigerating equipment, including motor-compressors and controllers, from the circuit conductors. If the disconnecting means is readily accessible to unqualified persons, any enclosure door or hinged cover of a disconnecting means enclosure tha... | https://2023.antflix.net#440.11 |
Chapter 4 Equipment for General Use | 440.12(A) | A disconnecting means serving a hermetic refrigerant motor-compressor shall be selected on the basis of the nameplate rated-load current or branch-circuit selection current, whichever is greater, and locked-rotor current, respectively, of the motor-compressor as follows. [440.12(A)](https://2023.antflix.net#440.12(A)) | https://2023.antflix.net#440.12(A) |
Chapter 4 Equipment for General Use | 440.12(A)(1) | The ampere rating shall be at least 115 percent of the nameplate rated-load current or branch-circuit selection current, whichever is greater. Exception: A listed unfused motor circuit switch, without fuseholders, having a horsepower rating not less than the equivalent horsepower determined in accordance with 440.12(A)... | https://2023.antflix.net#440.12(A)(1) |
Chapter 4 Equipment for General Use | 440.12(A)(2) | To determine the equivalent horsepower in complying with the requirements of 430.109, the horsepower rating shall be selected from Table 430.248, Table 430.249, or Table 430.250 corresponding to the rated-load current or branch-circuit selection current, whichever is greater, and also the horsepower rating from Table 4... | https://2023.antflix.net#440.12(A)(2) |
Chapter 4 Equipment for General Use | 440.12(B) | Where the combined load of two or more hermetic refrigerant motor-compressors or one or more hermetic refrigerant motor-compressor with other motors or loads may be simultaneous on a single disconnecting means, the rating for the disconnecting means shall be determined in accordance with 440.12(B)(1) and (B)(2). [440.1... | https://2023.antflix.net#440.12(B) |
Chapter 4 Equipment for General Use | 440.12(B)(1) | The horsepower rating of the disconnecting means shall be determined from the sum of all currents, including resistance loads, at the rated-load condition and also at the locked-rotor condition. The combined rated-load current and the combined locked-rotor current so obtained shall be considered as a single motor for t... | https://2023.antflix.net#440.12(B)(1) |
Chapter 4 Equipment for General Use | 440.12(B)(2) | The ampere rating of the disconnecting means shall be at least 115 percent of the sum of all currents at the rated-load condition determined in accordance with 440.12(B)(1). Exception: A listed unfused motor circuit switch, without fuseholders, having a horsepower rating not less than the equivalent horsepower determin... | https://2023.antflix.net#440.12(B)(2) |
Chapter 4 Equipment for General Use | 440.12(C) | For small motor-compressors not having the locked-rotor current marked on the nameplate, or for small motors not covered by Table 430.247, Table 430.248, Table 430.249, or Table 430.250, the locked-rotor current shall be assumed to be six times the rated-load current. [440.12(C)](https://2023.antflix.net#440.12(C)) | https://2023.antflix.net#440.12(C) |
Chapter 4 Equipment for General Use | 440.12(D) | Every disconnecting means in the refrigerant motor-compressor circuit between the point of attachment to the feeder and the point of connection to the refrigerant motor-compressor shall comply with the requirements of 440.12. [440.12(D)](https://2023.antflix.net#440.12(D)) | https://2023.antflix.net#440.12(D) |
Chapter 4 Equipment for General Use | 440.12(E) | Where the rated-load or locked-rotor current as determined above would indicate a disconnecting means rated in excess of 100 hp, 430.109(E) shall apply. [440.12(E)](https://2023.antflix.net#440.12(E)) | https://2023.antflix.net#440.12(E) |
Chapter 4 Equipment for General Use | 440.13 | For cord-connected equipment such as room air conditioners, household refrigerators and freezers, drinking water coolers, and beverage dispensers, a separable connector or an attachment plug and receptacle shall be permitted to serve as the disconnecting means. Informational Note: See 440.63 for room air conditioners. ... | https://2023.antflix.net#440.13 |
Chapter 4 Equipment for General Use | 440.14 | Disconnecting means shall be located within sight from, and readily accessible from, the air-conditioning or refrigerating equipment. The disconnecting means shall be permitted to be installed on or within the air-conditioning or refrigerating equipment. Disconnecting means shall meet the working space requirements of ... | https://2023.antflix.net#440.14 |
Chapter 4 Equipment for General Use | 440.21 | Part III specifies devices intended to protect the branch-circuit conductors, control apparatus, and motors in circuits supplying hermetic refrigerant motor-compressors against overcurrent due to short circuits and ground faults. They are in addition to or amendatory of the overcurrent protection requirements found els... | https://2023.antflix.net#440.21 |
Chapter 4 Equipment for General Use | 440.22(A) | The motor-compressor branch-circuit short-circuit and ground-fault protective device shall be capable of carrying the starting current of the motor. A protective device having a rating or setting not exceeding 175 percent of the motor-compressor rated-load current or branch-circuit selection current, whichever is great... | https://2023.antflix.net#440.22(A) |
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