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Chapter 3 Wiring Methods and Materials | 310.10(E) | Conductors used for direct-burial applications shall be of a type identified for such use. [310.10(E)](https://2023.antflix.net#310.10(E)) | https://2023.antflix.net#310.10(E) |
Chapter 3 Wiring Methods and Materials | 310.10(F) | Conductors exposed to oils, greases, vapors, gases, fumes, liquids, or other substances having a deleterious effect on the conductor or insulation shall be of a type suitable for the application. [310.10(F)](https://2023.antflix.net#310.10(F)) | https://2023.antflix.net#310.10(F) |
Chapter 3 Wiring Methods and Materials | 310.10(G)(1) | Aluminum, copper-clad aluminum, or copper circuit conductors for each ungrounded conductor, grounded conductor, or neutral conductor shall be permitted to be connected in parallel (electrically joined at both ends) only in sizes 1/0 AWG and larger and shall be installed in accordance with 310.10(G)(2) through (G)(4). E... | https://2023.antflix.net#310.10(G)(1) |
Chapter 3 Wiring Methods and Materials | 310.10(G)(2) | The paralleled conductors that comprise each ungrounded conductor, grounded conductor, neutral conductor, equipment grounding conductor, equipment bonding jumper, or supply-side bonding jumper shall comply with all of the following: Be the same lengthConsist of the same conductor materialBe the same size in circular mi... | https://2023.antflix.net#310.10(G)(2) |
Chapter 3 Wiring Methods and Materials | 310.10(G)(3) | Where run in separate cables or raceways, the cables or raceways with conductors shall have the same number of conductors and shall have the same electrical characteristics. Conductors composing one paralleled set shall not be required to have the same physical characteristics as those of another paralleled set. [310.1... | https://2023.antflix.net#310.10(G)(3) |
Chapter 3 Wiring Methods and Materials | 310.10(G)(4) | Conductors installed in parallel shall comply with 310.15(B) and (C). [310.10(G)(4)](https://2023.antflix.net#310.10(G)(4)) | https://2023.antflix.net#310.10(G)(4) |
Chapter 3 Wiring Methods and Materials | 310.10(G)(5) | Where parallel equipment grounding conductors are used, they shall be sized in accordance with 250.122. Sectioned equipment grounding conductors smaller than 1/0 AWG shall be permitted in multiconductor cables, if the combined circular mil area of the sectioned equipment grounding conductors in each cable complies with... | https://2023.antflix.net#310.10(G)(5) |
Chapter 3 Wiring Methods and Materials | 310.10(G)(6) | Where parallel equipment bonding jumpers or supply-side bonding jumpers are installed in raceways, they shall be sized and installed in accordance with 250.102. [310.10(G)(6)](https://2023.antflix.net#310.10(G)(6)) | https://2023.antflix.net#310.10(G)(6) |
Chapter 3 Wiring Methods and Materials | 310.12 | For one-family dwellings and the individual dwelling units of two-family and multifamily dwellings, service and feeder conductors supplied by a single-phase, 120/240-volt system shall be permitted to be sized in accordance with 310.12(A) through (D). For one-family dwellings and the individual dwelling units of two-fam... | https://2023.antflix.net#310.12 |
Chapter 3 Wiring Methods and Materials | 310.12(A) | For a service rated 100 amperes through 400 amperes, the service conductors supplying the entire load associated with a one-family dwelling, or the service conductors supplying the entire load associated with an individual dwelling unit in a two-family or multifamily dwelling, shall be permitted to have an ampacity not... | https://2023.antflix.net#310.12(A) |
Chapter 3 Wiring Methods and Materials | 310.12(B) | For a feeder rated 100 amperes through 400 amperes, the feeder conductors supplying the entire load associated with a one-family dwelling, or the feeder conductors supplying the entire load associated with an individual dwelling unit in a two-family or multifamily dwelling, shall be permitted to have an ampacity not le... | https://2023.antflix.net#310.12(B) |
Chapter 3 Wiring Methods and Materials | 310.12(C) | In no case shall a feeder for an individual dwelling unit be required to have an ampacity greater than that specified in 310.12(A) or (B). [310.12(C)](https://2023.antflix.net#310.12(C)) | https://2023.antflix.net#310.12(C) |
Chapter 3 Wiring Methods and Materials | 310.12(D) | Grounded conductors shall be permitted to be sized smaller than the ungrounded conductors, if the requirements of 220.61 and 230.42 for service conductors or the requirements of 215.2 and 220.61 for feeder conductors are met. Where correction or adjustment factors are required by 310.15(B) or (C), they shall be permitt... | https://2023.antflix.net#310.12(D) |
Chapter 3 Wiring Methods and Materials | 310.14(A)(1) | Ampacities for conductors shall be permitted to be determined by tables as provided in 310.15 or under engineering supervision as provided in 310.14(B). Informational Note No. 1: See 210.19, Informational Note, for voltage drop on branch circuits that this section does not take into consideration. See 215.2(A)(2), Info... | https://2023.antflix.net#310.14(A)(1) |
Chapter 3 Wiring Methods and Materials | 310.14(A)(2) | Where more than one ampacity applies for a given circuit length, the lowest value shall be used. Exception: Where different ampacities apply to portions of a circuit, the higher ampacity shall be permitted to be used if the total portion(s) of the circuit with lower ampacity does not exceed the lesser of 3.0 m (10 ft) ... | https://2023.antflix.net#310.14(A)(2) |
Chapter 3 Wiring Methods and Materials | 310.14(A)(3) | No conductor shall be used in such a manner that its operating temperature exceeds that designated for the type of insulated conductor involved. In no case shall conductors be associated together in such a way, with respect to type of circuit, the wiring method employed, or the number of conductors, that the limiting t... | https://2023.antflix.net#310.14(A)(3) |
Chapter 3 Wiring Methods and Materials | 310.14(B) | Under engineering supervision, conductor ampacities shall be permitted to be calculated by means of Equation 310.14(B). [310.14(B)] where: Tc = conductor temperature in degrees Celsius (°C) Ta = ambient temperature in degrees Celsius (°C) Rdc = dc resistance of 305 mm (1 ft) of conductor in microohms at t... | https://2023.antflix.net#310.14(B) |
Chapter 3 Wiring Methods and Materials | 310.15(A) | Ampacities for conductors rated 0 volts to 2000 volts shall be as specified in the Ampacity Table 310.16 through Table 310.21, as modified by 310.15(A) through (F) and 310.12. Under engineering supervision, ampacities of sizes not shown in ampacity tables for conductors meeting the general wiring requirements shall be ... | https://2023.antflix.net#310.15(A) |
Chapter 3 Wiring Methods and Materials | 310.15(B)(1) | Ampacities for ambient temperatures other than those shown in the ampacity tables shall be corrected in accordance with Table 310.15(B)(1)(1) or Table 310.15(B)(1)(2), or shall be permitted to be calculated using Equation 310.15(B)(1). [310.15(B)(1)] where: I' = ampacity corrected for ambient temperature I ... | https://2023.antflix.net#310.15(B)(1) |
Chapter 3 Wiring Methods and Materials | 310.15(B)(2) | For raceways or cables exposed to direct sunlight on or above rooftops where the distance above the roof to the bottom of the raceway or cable is less than 19 mm (3/4 in.), a temperature adder of 33°C (60°F) shall be added to the outdoor temperature to determine the applicable ambient temperature for application of the... | https://2023.antflix.net#310.15(B)(2) |
Chapter 3 Wiring Methods and Materials | 310.15(C)(1) | The ampacity of each conductor shall be reduced as shown in Table 310.15(C)(1) where the number of current-carrying conductors in a raceway or cable exceeds three, or where single conductors or multiconductor cables not installed in raceways are installed without maintaining spacing for a continuous length longer than ... | https://2023.antflix.net#310.15(C)(1) |
Chapter 3 Wiring Methods and Materials | 310.15(C)(2) | Spacing between raceways shall be maintained. [310.15(C)(2)](https://2023.antflix.net#310.15(C)(2)) | https://2023.antflix.net#310.15(C)(2) |
Chapter 3 Wiring Methods and Materials | 310.15(D) | Where bare or covered conductors are installed with insulated conductors, the temperature rating of the bare or covered conductor shall be equal to the lowest temperature rating of the insulated conductors for the purpose of determining ampacity. [310.15(D)](https://2023.antflix.net#310.15(D)) | https://2023.antflix.net#310.15(D) |
Chapter 3 Wiring Methods and Materials | 310.15(E) | Neutral conductors shall be considered current carrying in accordance with any of the following: A neutral conductor that carries only the unbalanced current from other conductors of the same circuit shall not be required to be counted when applying the provisions of 310.15(C)(1).In a 3-wire circuit consisting of two p... | https://2023.antflix.net#310.15(E) |
Chapter 3 Wiring Methods and Materials | 310.15(F) | A grounding or bonding conductor shall not be counted when applying the provisions of 310.15(C)(1). [310.15(F)](https://2023.antflix.net#310.15(F)) | https://2023.antflix.net#310.15(F) |
Chapter 3 Wiring Methods and Materials | 310.16 | The ampacities shall be as specified in Table 310.16 where all of the following conditions apply: (1) Conductors are rated 0 volts through 2000 volts. (2) Conductors are rated 60°C (140°F), 75°C (167°F), or 90°C (194°F). (3) Wiring is installed in a 30°C (86°F) ambient temperature. (4) There are not more than three cur... | https://2023.antflix.net#310.16 |
Chapter 3 Wiring Methods and Materials | 310.17 | The ampacities shall be as specified in Table 310.17 where all of the following conditions apply: (1) Conductors are rated 0 volts through 2000 volts. (2) Conductors are rated 60°C (140°F), 75°C (167°F), or 90°C (194°F). (3) Wiring is installed in a 30°C (86°F) ambient temperature. Table 310.17 Ampacities of Single-Ins... | https://2023.antflix.net#310.17 |
Chapter 3 Wiring Methods and Materials | 310.18 | The ampacities shall be as specified in Table 310.18 where all of the following conditions apply: (1) Conductors are rated 0 volts through 2000 volts. (2) Conductors are rated 150°C (302°F), 200°C (392°F), or 250°C (482°F). (3) Wiring is installed in a 40°C (104°F) ambient temperature. (4) There are not more than three... | https://2023.antflix.net#310.18 |
Chapter 3 Wiring Methods and Materials | 310.19 | The ampacities shall be as specified in Fable 310.19 where all of the following conditions apply: (1) Conductors are rated 0 volts through 2000 volts. (2) Conductors are rated up to 250°C (482°F). (3) Wiring is installed in a 40°C (104°F) ambient temperature. Table 310.19 Ampacities of Single-Insulated Conductors in Fr... | https://2023.antflix.net#310.19 |
Chapter 3 Wiring Methods and Materials | 310.20 | The ampacities shall be as specified in Table 310.20 where all of the following conditions apply: (1) Conductors are rated 0 volts through 2000 volts. (2) Conductors are rated 75°C (167°F) or 90°C (194°F). (3) Wiring is installed in a 40°C (104°F) ambient temperature. (4) There are not more than three single-insulated ... | https://2023.antflix.net#310.20 |
Chapter 3 Wiring Methods and Materials | 310.21 | The ampacities shall be as specified in Table 310.21 where all of the following conditions apply: Wind velocity is 610 mm/sec (2 ft/sec).Conductors are 80°C (176°F) total conductor temperature.Wiring is installed in a 40°C (104°F) ambient temperature.Table 310.21 Ampacities of Bare or Covered Conductors in Free Air C... | https://2023.antflix.net#310.21 |
Chapter 3 Wiring Methods and Materials | 312.1 | This article covers the installation and construction specifications of cabinets, cutout boxes, and meter socket enclosures. It does not apply to equipment operating at over 1000 volts, except as specifically referenced elsewhere in the Code. [312.1](https://2023.antflix.net#312.1) | https://2023.antflix.net#312.1 |
Chapter 3 Wiring Methods and Materials | 312.2 | In damp or wet locations, surface-type enclosures within the scope of this article shall be placed or equipped so as to prevent moisture or water from entering and accumulating within the cabinet or cutout box, and shall be mounted so there is at least 6-mm (1/4-in.) airspace between the enclosure and the wall or other... | https://2023.antflix.net#312.2 |
Chapter 3 Wiring Methods and Materials | 312.3 | In walls of concrete, tile, or other noncombustible material, cabinets shall be installed so that the front edge of the cabinet is not set back of the finished surface more than 6 mm (1/4 in.). In walls constructed of wood or other combustible material, cabinets shall be flush with the finished surface or project there... | https://2023.antflix.net#312.3 |
Chapter 3 Wiring Methods and Materials | 312.4 | Noncombustible surfaces that are broken or incomplete shall be repaired so there will be no gaps or open spaces greater than 3 mm (1/8 in.) at the edge of the cabinet or cutout box employing a flush-type cover. [312.4](https://2023.antflix.net#312.4) | https://2023.antflix.net#312.4 |
Chapter 3 Wiring Methods and Materials | 312.5 | Cable assemblies and insulated conductors entering enclosures within the scope of this article shall be protected from abrasion and shall comply with 312.5(A) through (C). [312.5](https://2023.antflix.net#312.5) | https://2023.antflix.net#312.5 |
Chapter 3 Wiring Methods and Materials | 312.5(A) | Openings through which conductors enter shall be closed in an approved manner. [312.5(A)](https://2023.antflix.net#312.5(A)) | https://2023.antflix.net#312.5(A) |
Chapter 3 Wiring Methods and Materials | 312.5(B) | Where metal enclosures within the scope of this article are installed with messenger-supported wiring, open wiring on insulators, or concealed knob-and-tube wiring, conductors shall enter through insulating bushings or, in dry locations, through flexible tubing extending from the last insulating support and firmly secu... | https://2023.antflix.net#312.5(B) |
Chapter 3 Wiring Methods and Materials | 312.5(C) | Where cable is used, each cable shall be secured to the cabinet, cutout box, or meter socket enclosure. Exception No. 1: Cables with entirely nonmetallic sheaths shall be permitted to enter the top of a surface-mounted enclosure through one or more nonflexible raceways not less than 450 mm (18 in.) and not more than 3.... | https://2023.antflix.net#312.5(C) |
Chapter 3 Wiring Methods and Materials | 312.6 | Conductors at terminals or conductors entering or leaving cabinets, cutout boxes, and meter socket enclosures shall comply with 312.6(A) through (C). Exception: Wire-bending space in enclosures for motor controllers with provisions for one or two wires per terminal shall comply with 430.10(B). [312.6](https://2023.antf... | https://2023.antflix.net#312.6 |
Chapter 3 Wiring Methods and Materials | 312.6(A) | Conductors shall not be deflected within a cabinet or cutout box unless a gutter having a width in accordance with Table 312.6(A) is provided. Conductors in parallel in accordance with 310.10(G) shall be judged on the basis of the number of conductors in parallel.
Table 312.6(A) Minimum Wire-Bending Space at Terminals ... | https://2023.antflix.net#312.6(A) |
Chapter 3 Wiring Methods and Materials | 312.6(B) | Wire-bending space at each terminal shall be provided in accordance with 312.6(B)(1) or (B)(2). [312.6(B)](https://2023.antflix.net#312.6(B)) | https://2023.antflix.net#312.6(B) |
Chapter 3 Wiring Methods and Materials | 312.6(B)(1) | Table 312.6(A) shall apply where the conductor does not enter or leave the enclosure through the wall opposite its terminal. [312.6(B)(1)](https://2023.antflix.net#312.6(B)(1)) | https://2023.antflix.net#312.6(B)(1) |
Chapter 3 Wiring Methods and Materials | 312.6(B)(2) | Table 312.6(B)(2) shall apply where the conductor does enter or leave the enclosure through the wall opposite its terminal.
Exception No. 1: Where the distance between the wall and its terminal is in accordance with Table 312.6(A), a conductor shall be permitted to enter or leave an enclosure through the wall opposite ... | https://2023.antflix.net#312.6(B)(2) |
Chapter 3 Wiring Methods and Materials | 312.6(C) | Installation shall comply with 300.4(G). [312.6(C)](https://2023.antflix.net#312.6(C)) | https://2023.antflix.net#312.6(C) |
Chapter 3 Wiring Methods and Materials | 312.7 | Cabinets and cutout boxes shall have approved space to accommodate all conductors installed in them without crowding. [312.7](https://2023.antflix.net#312.7) | https://2023.antflix.net#312.7 |
Chapter 3 Wiring Methods and Materials | 312.8 | The wiring space within enclosures for switches and overcurrent devices shall be permitted for other wiring and equipment subject to limitations for specific equipment as provided in 312.8(A) and (B). [312.8](https://2023.antflix.net#312.8) | https://2023.antflix.net#312.8 |
Chapter 3 Wiring Methods and Materials | 312.8(A) | The wiring space of enclosures for switches or overcurrent devices shall be permitted for conductors feeding through, spliced, or tapping off to other enclosures, switches, or overcurrent devices where all of the following conditions are met: The total of all conductors installed at any cross section of the wiring spac... | https://2023.antflix.net#312.8(A) |
Chapter 3 Wiring Methods and Materials | 312.8(B) | The wiring space of enclosures for switches or overcurrent devices shall be permitted to contain power monitoring or energy management equipment in accordance with 312.8(B)(1) through (B)(3). [312.8(B)](https://2023.antflix.net#312.8(B)) | https://2023.antflix.net#312.8(B) |
Chapter 3 Wiring Methods and Materials | 312.8(B)(1) | Power monitoring or energy management equipment shall either be identified as a field installable accessory as part of the listed equipment or be a listed kit evaluated for field installation in switch or overcurrent device enclosures. [312.8(B)(1)](https://2023.antflix.net#312.8(B)(1)) | https://2023.antflix.net#312.8(B)(1) |
Chapter 3 Wiring Methods and Materials | 312.8(B)(2) | The total area of all conductors, splices, taps, and equipment at any cross section of the wiring space shall not exceed 75 percent of the cross-sectional area of that space. [312.8(B)(2)](https://2023.antflix.net#312.8(B)(2)) | https://2023.antflix.net#312.8(B)(2) |
Chapter 3 Wiring Methods and Materials | 312.8(B)(3) | Conductors used exclusively for control or instrumentation circuits shall comply with either 312.8(B)(3)(a) or (B)(3)(b). Conductors shall comply with 724.49.Conductors smaller than 18 AWG, but not smaller than 22 AWG for a single conductor and 26 AWG for a multiconductor cable, shall be permitted to be used where the ... | https://2023.antflix.net#312.8(B)(3) |
Chapter 3 Wiring Methods and Materials | 312.9 | Cabinets and cutout boxes shall be provided with back-wiring spaces, gutters, or wiring compartments as required by 312.101(C) and (D). [312.9](https://2023.antflix.net#312.9) | https://2023.antflix.net#312.9 |
Chapter 3 Wiring Methods and Materials | 312.10 | Screws or other fasteners installed in the field that enter wiring spaces shall be as provided by or specified by the manufacturer or shall comply with the following as applicable: Screws shall be machine type with blunt ends.Other fasteners shall have blunt ends.Screws or other fasteners shall extend into the enclosur... | https://2023.antflix.net#312.10 |
Chapter 3 Wiring Methods and Materials | 312.100 | Cabinets, cutout boxes, and meter socket enclosures shall comply with 312.100(A) through (C). [312.100](https://2023.antflix.net#312.100) | https://2023.antflix.net#312.100 |
Chapter 3 Wiring Methods and Materials | 312.100(A) | Metal enclosures within the scope of this article shall be protected both inside and outside against corrosion. [312.100(A)](https://2023.antflix.net#312.100(A)) | https://2023.antflix.net#312.100(A) |
Chapter 3 Wiring Methods and Materials | 312.100(B) | The design and construction of enclosures within the scope of this article shall be such as to secure ample strength and rigidity. If constructed of sheet steel, the metal thickness shall not be less than 1.35 mm (0.053 in.) uncoated. [312.100(B)](https://2023.antflix.net#312.100(B)) | https://2023.antflix.net#312.100(B) |
Chapter 3 Wiring Methods and Materials | 312.100(C) | Nonmetallic cabinets shall be listed, or they shall be submitted for approval prior to installation. [312.100(C)](https://2023.antflix.net#312.100(C)) | https://2023.antflix.net#312.100(C) |
Chapter 3 Wiring Methods and Materials | 312.101 | The spacing within cabinets and cutout boxes shall comply with 312.101(A) through (D). [312.101](https://2023.antflix.net#312.101) | https://2023.antflix.net#312.101 |
Chapter 3 Wiring Methods and Materials | 312.101(A) | Spacing within cabinets and cutout boxes shall provide approved spacing for the distribution of wires and cables placed in them and for a separation between metal parts of devices and apparatus mounted within them in accordance with 312.101(A)(1), (A)(2), and (A)(3). [312.101(A)](https://2023.antflix.net#312.101(A)) | https://2023.antflix.net#312.101(A) |
Chapter 3 Wiring Methods and Materials | 312.101(A)(1) | Other than at points of support, there shall be an airspace of at least 1.59 mm (0.0625 in.) between the base of the device and the wall of any metal cabinet or cutout box in which the device is mounted. [312.101(A)(1)](https://2023.antflix.net#312.101(A)(1)) | https://2023.antflix.net#312.101(A)(1) |
Chapter 3 Wiring Methods and Materials | 312.101(A)(2) | There shall be an airspace of at least 25.4 mm (1.00 in.) between any live metal part, including live metal parts of enclosed fuses, and the door. Exception: Where the door is lined with an approved insulating material or is of a thickness of metal not less than 2.36 mm (0.093 in.) uncoated, the airspace shall not be l... | https://2023.antflix.net#312.101(A)(2) |
Chapter 3 Wiring Methods and Materials | 312.101(A)(3) | There shall be an airspace of at least 12.7 mm (0.500 in.) between the walls, back, gutter partition, if of metal, or door of any cabinet or cutout box and the nearest exposed current-carrying part of devices mounted within the cabinet where the voltage does not exceed 250. This spacing shall be increased to at least 2... | https://2023.antflix.net#312.101(A)(3) |
Chapter 3 Wiring Methods and Materials | 312.101(B) | Cabinets and cutout boxes shall be deep enough to allow the closing of the doors when 30-ampere branch-circuit panelboard switches are in any position, when combination cutout switches are in any position, or when other single-throw switches are opened as far as their construction permits. [312.101(B)](https://2023.ant... | https://2023.antflix.net#312.101(B) |
Chapter 3 Wiring Methods and Materials | 312.101(C) | Cabinets and cutout boxes that contain devices or apparatus connected within the cabinet or box to more than eight conductors, including those of branch circuits, meter loops, feeder circuits, power circuits, and similar circuits, but not including the supply circuit or a continuation thereof, shall have back-wiring sp... | https://2023.antflix.net#312.101(C) |
Chapter 3 Wiring Methods and Materials | 312.101(D) | Side-wiring spaces, side gutters, or side-wiring compartments of cabinets and cutout boxes shall be made tight enclosures by means of covers, barriers, or partitions extending from the bases of the devices contained in the cabinet, to the door, frame, or sides of the cabinet. Exception: Side-wiring spaces, side gutters... | https://2023.antflix.net#312.101(D) |
Chapter 3 Wiring Methods and Materials | 312.102 | Cabinets, cutout boxes, and meter socket enclosures shall be equipped with doors or covers. [312.102](https://2023.antflix.net#312.102) | https://2023.antflix.net#312.102 |
Chapter 3 Wiring Methods and Materials | 314.1 | This article covers the installation and use of all boxes and conduit bodies used as outlet, device, junction, or pull boxes, depending on their use, and handhole enclosures. Cast metal, sheet metal, nonmetallic, and other boxes such as FS, FD, and larger boxes are not classified as conduit bodies. This article also in... | https://2023.antflix.net#314.1 |
Chapter 3 Wiring Methods and Materials | 314.2 | Round boxes shall not be used where conduits or connectors requiring the use of locknuts or bushings are to be connected to the side of the box. [314.2](https://2023.antflix.net#314.2) | https://2023.antflix.net#314.2 |
Chapter 3 Wiring Methods and Materials | 314.3 | Nonmetallic boxes shall be permitted only with open wiring on insulators, concealed knob-and-tube wiring, cabled wiring methods with entirely nonmetallic sheaths, flexible cords, and nonmetallic raceways. Exception No. 1: Where internal bonding means are provided between all entries, nonmetallic boxes shall be permitte... | https://2023.antflix.net#314.3 |
Chapter 3 Wiring Methods and Materials | 314.4 | Metal boxes shall be grounded and bonded in accordance with Parts I, IV, V, VI, VII, and X of Article 250 as applicable, except as permitted in 250.112(I). [314.4](https://2023.antflix.net#314.4) | https://2023.antflix.net#314.4 |
Chapter 3 Wiring Methods and Materials | 314.5 | Screws or other fasteners installed in the field that enter wiring spaces shall be as provided by or specified by the manufacturer or shall comply with the following as applicable: Screws shall be machine type with blunt ends.Other fasteners shall have blunt ends.Screws attaching a cover shall extend no more than 10 mm... | https://2023.antflix.net#314.5 |
Chapter 3 Wiring Methods and Materials | 314.15 | In damp or wet locations, boxes, conduit bodies, outlet box hoods, and fittings shall be placed or equipped so as to prevent moisture from entering or accumulating within the box, conduit body, or fitting. Boxes, conduit bodies, outlet box hoods, and fittings installed in wet locations shall be listed for use in wet lo... | https://2023.antflix.net#314.15 |
Chapter 3 Wiring Methods and Materials | 314.16 | Boxes and conduit bodies shall be of an approved size to provide free space for all enclosed conductors. In no case shall the volume of the box, as calculated in 314.16(A), be less than the fill calculation as calculated in 314.16(B). The minimum volume for conduit bodies shall be as calculated in 314.16(C). This secti... | https://2023.antflix.net#314.16 |
Chapter 3 Wiring Methods and Materials | 314.16(A) | The volume of a wiring enclosure (box) shall be the total volume of the assembled sections and, where used, the space provided by plaster rings, domed covers, extension rings, and so forth, that are marked with their volume or are made from boxes the dimensions of which are listed in Table 314.16(A). Where a box is pro... | https://2023.antflix.net#314.16(A) |
Chapter 3 Wiring Methods and Materials | 314.16(A)(1) | The volumes of standard boxes that are not marked with their volume shall be as given in Table 314.16(A). [314.16(A)(1)](https://2023.antflix.net#314.16(A)(1)) | https://2023.antflix.net#314.16(A)(1) |
Chapter 3 Wiring Methods and Materials | 314.16(A)(2) | Boxes 1650 cm3 (100 in.3) or less, other than those described in Table 314.16(A), and nonmetallic boxes shall be durably and legibly marked by the manufacturer with their volume(s). Boxes described in Table 314.16(A) that have a volume larger than is designated in the table shall be permitted to have their volume marke... | https://2023.antflix.net#314.16(A)(2) |
Chapter 3 Wiring Methods and Materials | 314.16(B) | The volumes in 314.16(B)(1) through (B)(6), as applicable, shall be added together. No allowance shall be required for small fittings such as locknuts and bushings. Each space within a box installed with a barrier shall be calculated separately. [314.16(B)](https://2023.antflix.net#314.16(B)) | https://2023.antflix.net#314.16(B) |
Chapter 3 Wiring Methods and Materials | 314.16(B)(1) | Each conductor that originates outside the box and terminates or is spliced within the box shall be counted once, and each conductor that passes through the box without splice or termination shall be counted once. Each loop or coil of unbroken conductor not less than twice the minimum length required for free conductor... | https://2023.antflix.net#314.16(B)(1) |
Chapter 3 Wiring Methods and Materials | 314.16(B)(2) | Where one or more internal cable clamps, whether factory or field supplied, are present in the box, a single volume allowance in accordance with Table 314.16(B)(1) shall be made based on the largest conductor present in the box. No allowance shall be required for a cable connector with its clamping mechanism outside th... | https://2023.antflix.net#314.16(B)(2) |
Chapter 3 Wiring Methods and Materials | 314.16(B)(3) | Where one or more luminaire studs or hickeys are present in the box, a single volume allowance in accordance with Table 314.16(B)(1) shall be made for each type of fitting based on the largest conductor present in the box. [314.16(B)(3)](https://2023.antflix.net#314.16(B)(3)) | https://2023.antflix.net#314.16(B)(3) |
Chapter 3 Wiring Methods and Materials | 314.16(B)(4) | For each yoke or strap containing one or more devices or equipment, a double volume allowance in accordance with Table 314.16(B)(1) shall be made for each yoke or strap based on the largest conductor connected to a device(s) or equipment supported by that yoke or strap. A device or utilization equipment wider than a si... | https://2023.antflix.net#314.16(B)(4) |
Chapter 3 Wiring Methods and Materials | 314.16(B)(5) | Where up to four equipment grounding conductors enter a box, a single volume allowance in accordance with Table 314.16(B)(1) shall be made based on the largest equipment grounding conductor entering the box. A 1/4 volume allowance shall be made for each additional equipment grounding conductor that enters the box, base... | https://2023.antflix.net#314.16(B)(5) |
Chapter 3 Wiring Methods and Materials | 314.16(B)(6) | Where a terminal block is present in a box, a single volume allowance in accordance with Table 314.16(B)(1) shall be made for each terminal block assembly based on the largest conductor(s) terminated to the assembly. [314.16(B)(6)](https://2023.antflix.net#314.16(B)(6)) | https://2023.antflix.net#314.16(B)(6) |
Chapter 3 Wiring Methods and Materials | 314.16(C)(1) | Conduit bodies enclosing 6 AWG conductors or smaller, other than short-radius conduit bodies as described in 314.16(C)(3). shall have a cross-sectional area not less than twice the cross-sectional area of the largest conduit or tubing to which they can be attached. The maximum number of conductors permitted shall be th... | https://2023.antflix.net#314.16(C)(1) |
Chapter 3 Wiring Methods and Materials | 314.16(C)(2) | Only those conduit bodies that are durably and legibly marked by the manufacturer with their volume shall be permitted to contain splices, taps, or devices. The maximum number of conductors shall be calculated in accordance with 314.16(B). Conduit bodies shall be supported in a rigid and secure manner. [314.16(C)(2)](h... | https://2023.antflix.net#314.16(C)(2) |
Chapter 3 Wiring Methods and Materials | 314.16(C)(3) | Conduit bodies such as capped elbows and service-entrance elbows that enclose conductors 6 AWG or smaller, and are only intended to enable the installation of the raceway and the contained conductors, shall not contain splices, taps, or devices and shall be of an approved size to provide free space for all conductors e... | https://2023.antflix.net#314.16(C)(3) |
Chapter 3 Wiring Methods and Materials | 314.17 | Conductors entering boxes, conduit bodies, or fittings shall be protected from abrasion. Conductors and cables shall comply with 314.17(A) through (C). [314.17](https://2023.antflix.net#314.17) | https://2023.antflix.net#314.17 |
Chapter 3 Wiring Methods and Materials | 314.17(A) | Openings through which conductors enter shall be closed in an approved manner. [314.17(A)](https://2023.antflix.net#314.17(A)) | https://2023.antflix.net#314.17(A) |
Chapter 3 Wiring Methods and Materials | 314.17(B) | The installation of the conductors and cables in boxes and conduit bodies shall comply with 314.17(B)(1) through (B)(4). [314.17(B)](https://2023.antflix.net#314.17(B)) | https://2023.antflix.net#314.17(B) |
Chapter 3 Wiring Methods and Materials | 314.17(B)(1) | For messenger-supported wiring, open wiring on insulators, or concealed knob-and-tube wiring, the conductors shall enter the box through individual holes. In installations where metal boxes or conduit bodies are used with conductors unprotected by flexible tubing, the individual openings shall be provided with insulati... | https://2023.antflix.net#314.17(B)(1) |
Chapter 3 Wiring Methods and Materials | 314.17(B)(2) | Where cable assemblies with nonmetallic sheaths are used, the sheath shall extend not less than 6 mm (1/4 in.) inside the box and 6 mm (1/4 in.) beyond the end of any cable clamp. Except as covered in 300.15(C), the wiring method shall be secured to the box or conduit body. Exception: Where nonmetallic-sheathed cable i... | https://2023.antflix.net#314.17(B)(2) |
Chapter 3 Wiring Methods and Materials | 314.17(B)(3) | Where the raceway is complete between boxes, conduit bodies, or both and encloses individual conductors or nonmetallic cable assemblies or both, the conductors or cable assemblies shall not be required to be additionally secured. Where raceways enclose cable assemblies as covered in 300.15(C), the cable assembly shall ... | https://2023.antflix.net#314.17(B)(3) |
Chapter 3 Wiring Methods and Materials | 314.17(B)(4) | Nonmetallic boxes and conduit bodies shall be suitable for the lowest temperature-rated conductor entering the box or conduit body. [314.17(B)(4)](https://2023.antflix.net#314.17(B)(4)) | https://2023.antflix.net#314.17(B)(4) |
Chapter 3 Wiring Methods and Materials | 314.17(C) | Installation shall comply with 300.4(G). Informational Note: See 110.12(A) for requirements on closing unused cable and raceway knockout openings. [314.17(C)](https://2023.antflix.net#314.17(C)) | https://2023.antflix.net#314.17(C) |
Chapter 3 Wiring Methods and Materials | 314.19 | Boxes used to enclose flush devices or flush equipment shall be of such design that the devices or equipment will be completely enclosed on the back and sides, and substantial support for the devices or equipment will be provided. Screws for supporting the box shall not also be used to attach a device or equipment. [31... | https://2023.antflix.net#314.19 |
Chapter 3 Wiring Methods and Materials | 314.20 | Installations within or behind a surface of concrete, tile, gypsum, plaster, or other noncombustible material, including boxes employing a flush-type cover or faceplate, shall be made so that the front edge of the box, plaster ring, extension ring, or listed extender will not be set back of the finished surface more th... | https://2023.antflix.net#314.20 |
Chapter 3 Wiring Methods and Materials | 314.21 | Noncombustible surfaces that are broken or incomplete around boxes employing a flush-type cover or faceplate shall be repaired so there will be no gaps or open spaces greater than 3 mm (1/8 in.) at the edge of the box. [314.21](https://2023.antflix.net#314.21) | https://2023.antflix.net#314.21 |
Chapter 3 Wiring Methods and Materials | 314.22 | Surface extensions shall be made by mounting and mechanically securing an extension ring over the box. Equipment grounding shall be in accordance with Part VI of Article 250. Exception: A surface extension shall be permitted to be made from the cover of a box where the cover is designed so it is unlikely to fall off or... | https://2023.antflix.net#314.22 |
Chapter 3 Wiring Methods and Materials | 314.23 | Enclosures within the scope of this article shall be supported in accordance with 314.23(A) through (H) as applicable. [314.23](https://2023.antflix.net#314.23) | https://2023.antflix.net#314.23 |
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