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Chapter 3 Wiring Methods and Materials | 314.23(A) | An enclosure mounted on a building or other surface shall be rigidly and securely fastened in place. If the surface does not provide rigid and secure support, additional support in accordance with this section shall be provided. [314.23(A)](https://2023.antflix.net#314.23(A)) | https://2023.antflix.net#314.23(A) |
Chapter 3 Wiring Methods and Materials | 314.23(B) | An enclosure supported from a structural member or from grade shall be rigidly supported either directly or by using a metal, polymeric, or wood brace. [314.23(B)](https://2023.antflix.net#314.23(B)) | https://2023.antflix.net#314.23(B) |
Chapter 3 Wiring Methods and Materials | 314.23(B)(1) | Nails and screws, where used as a fastening means, shall secure boxes by using brackets on the outside of the enclosure, or by using mounting holes in the back or in one or more sides of the enclosure, or they shall pass through the interior within 6 mm (1/4 in.) of the back or ends of the enclosure. Screws shall not b... | https://2023.antflix.net#314.23(B)(1) |
Chapter 3 Wiring Methods and Materials | 314.23(B)(2) | Metal braces shall be protected against corrosion and formed from metal that is not less than 0.51 mm (0.020 in.) thick uncoated. Wood braces shall have a cross section not less than nominal 25 mm × 50 mm (1 in. × 2 in.). Wood braces in wet locations shall be treated for the conditions. Polymeric braces shall be identi... | https://2023.antflix.net#314.23(B)(2) |
Chapter 3 Wiring Methods and Materials | 314.23(C) | An enclosure mounted in a finished surface shall be rigidly secured thereto by clamps, anchors, or fittings identified for the application. [314.23(C)](https://2023.antflix.net#314.23(C)) | https://2023.antflix.net#314.23(C) |
Chapter 3 Wiring Methods and Materials | 314.23(D) | An enclosure mounted to structural or supporting elements of a suspended ceiling shall be not more than 1650 cm3 (100 in.3) in size and shall be securely fastened in place in accordance with either 314.23(D)(1) or (D)(2). [314.23(D)](https://2023.antflix.net#314.23(D)) | https://2023.antflix.net#314.23(D) |
Chapter 3 Wiring Methods and Materials | 314.23(D)(1) | An enclosure shall be fastened to the framing members by mechanical means such as bolts, screws, or rivets, or by the use of clips or other securing means identified for use with the type of ceiling framing member(s) and enclosure(s) employed. The framing members shall be supported in an approved manner and securely fa... | https://2023.antflix.net#314.23(D)(1) |
Chapter 3 Wiring Methods and Materials | 314.23(D)(2) | The installation shall comply with 300.11(B). The enclosure shall be secured, using identified methods, to ceiling support wire(s), including any additional support wire(s) installed for ceiling support. Support wire(s) used for enclosure support shall be fastened at each end so as to be taut within the ceiling cavity.... | https://2023.antflix.net#314.23(D)(2) |
Chapter 3 Wiring Methods and Materials | 314.23(E) | An enclosure that does not contain a device(s), other than splicing devices, or supports a luminaire(s), a lampholder, or other equipment and is supported by entering raceways shall not exceed 1650 cm3 (100 in.3) in size. It shall have threaded entries or identified hubs. It shall be supported by two or more conduits t... | https://2023.antflix.net#314.23(E) |
Chapter 3 Wiring Methods and Materials | 314.23(F) | An enclosure that contains a device(s), other than splicing devices, or supports a luminaire(s), a lampholder, or other equipment and is supported by entering raceways shall not exceed 1650 cm3 (100 in.3) in size. It shall have threaded entries or identified hubs. It shall be supported by two or more conduits threaded ... | https://2023.antflix.net#314.23(F) |
Chapter 3 Wiring Methods and Materials | 314.23(G) | An enclosure supported by embedment shall be identified as suitably protected from corrosion and securely embedded in concrete or masonry. [314.23(G)](https://2023.antflix.net#314.23(G)) | https://2023.antflix.net#314.23(G) |
Chapter 3 Wiring Methods and Materials | 314.23(H) | An enclosure supported by a pendant shall comply with 314.23(H)(1) or (H)(2). [314.23(H)](https://2023.antflix.net#314.23(H)) | https://2023.antflix.net#314.23(H) |
Chapter 3 Wiring Methods and Materials | 314.23(H)(1) | A box shall be supported from a multiconductor cord or cable in an approved manner that protects the conductors against strain. A connection to a box equipped with a hub shall be made with a listed cord grip attachment fitting marked for use with a threaded hub. [314.23(H)(1)](https://2023.antflix.net#314.23(H)(1)) | https://2023.antflix.net#314.23(H)(1) |
Chapter 3 Wiring Methods and Materials | 314.23(H)(2) | A box supporting lampholders or luminaires, or wiring enclosures within luminaires used in lieu of boxes in accordance with 300.15(B), shall be supported by rigid or intermediate metal conduit stems. For stems longer than 450 mm (18 in.), the stems shall be connected to the wiring system with listed swivel hangers suit... | https://2023.antflix.net#314.23(H)(2) |
Chapter 3 Wiring Methods and Materials | 314.24 | Outlet and device boxes shall have approved dimensions to allow equipment installed within them to be mounted properly and without likelihood of damage to conductors within the box. [314.24](https://2023.antflix.net#314.24) | https://2023.antflix.net#314.24 |
Chapter 3 Wiring Methods and Materials | 314.24(A) | Outlet boxes that do not enclose devices or utilization equipment shall have a minimum internal depth of 12.7 mm (1/2 in.). [314.24(A)](https://2023.antflix.net#314.24(A)) | https://2023.antflix.net#314.24(A) |
Chapter 3 Wiring Methods and Materials | 314.24(B) | Outlet and device boxes that enclose devices or utilization equipment shall have a minimum internal depth that accommodates the rearward projection of the equipment and the size of the conductors that supply the equipment. The internal depth shall include, where used, that of any extension boxes, plaster rings, or rais... | https://2023.antflix.net#314.24(B) |
Chapter 3 Wiring Methods and Materials | 314.24(B)(1) | Boxes that enclose devices or utilization equipment that projects more than 48 mm (17/8 in.) rearward from the mounting plane of the box shall have a depth that is not less than the depth of the equipment plus 6 mm (1/4 in.). [314.24(B)(1)](https://2023.antflix.net#314.24(B)(1)) | https://2023.antflix.net#314.24(B)(1) |
Chapter 3 Wiring Methods and Materials | 314.24(B)(2) | Boxes that enclose devices or utilization equipment supplied by conductors larger than 4 AWG shall be identified for their specific function. Exception: Devices or utilization equipment supplied by conductors larger than 4 AWG shall be permitted to be mounted on or in junction and pull boxes larger than 1650 cm3 (100 i... | https://2023.antflix.net#314.24(B)(2) |
Chapter 3 Wiring Methods and Materials | 314.24(B)(3) | Boxes that enclose devices or utilization equipment supplied by 8, 6, or 4 AWG conductors shall have an internal depth that is not less than 52.4 mm (21/16 in.). [314.24(B)(3)](https://2023.antflix.net#314.24(B)(3)) | https://2023.antflix.net#314.24(B)(3) |
Chapter 3 Wiring Methods and Materials | 314.24(B)(4) | Boxes that enclose devices or utilization equipment supplied by 12 or 10 AWG conductors shall have an internal depth that is not less than 30.2 mm (13/16 in.). Where the equipment projects rearward from the mounting plane of the box by more than 25 mm (1 in.), the box shall have a depth not less than that of the equipm... | https://2023.antflix.net#314.24(B)(4) |
Chapter 3 Wiring Methods and Materials | 314.24(B)(5) | Boxes that enclose devices or utilization equipment supplied by 14 AWG or smaller conductors shall have a depth that is not less than 23.8 mm (15/16 in.). Exception: Under any of the conditions specified in 314.24(B)(1) through (B)(5), devices or utilization equipment that is listed to be installed with specified boxes... | https://2023.antflix.net#314.24(B)(5) |
Chapter 3 Wiring Methods and Materials | 314.24(C) | Where devices or equipment are mounted in boxes having side-wiring entries, the conductors entering from the side shall be protected as covered in (1) or (2), as follows. The term side applies to any wall of a box other than the one opposite to the opening. The rearward projection of the device or equipment shall not e... | https://2023.antflix.net#314.24(C) |
Chapter 3 Wiring Methods and Materials | 314.25 | In completed installations, each box shall have a cover, faceplate, lampholder, or luminaire canopy, except where the installation complies with 410.24(B). Conduit body enclosures shall be installed with a cover, lampholder, or device. Screws used for the purpose of attaching covers, or other equipment, to the box shal... | https://2023.antflix.net#314.25 |
Chapter 3 Wiring Methods and Materials | 314.25(A) | Nonmetallic or metal covers and plates shall be permitted. Where metal covers or plates are used, they shall be connected to the equipment grounding conductor in accordance with 250.110. Informational Note: See 410.42 for metal luminaire canopies and 404.12 and 406.6(B) for metal faceplates for additional grounding req... | https://2023.antflix.net#314.25(A) |
Chapter 3 Wiring Methods and Materials | 314.25(B) | Where a luminaire canopy or pan is used, any combustible wall or ceiling finish exposed between the edge of the canopy or pan and the outlet box shall be covered with noncombustible material if required by 410.23. [314.25(B)](https://2023.antflix.net#314.25(B)) | https://2023.antflix.net#314.25(B) |
Chapter 3 Wiring Methods and Materials | 314.25(C) | Covers of outlet boxes and conduit bodies having holes through which flexible cord pendants pass shall be provided with identified bushings or shall have smooth, well-rounded surfaces on which the cords can bear. So-called hard rubber or composition bushings shall not be used. [314.25(C)](https://2023.antflix.net#314.2... | https://2023.antflix.net#314.25(C) |
Chapter 3 Wiring Methods and Materials | 314.27(A) | Outlet boxes or fittings designed for the support of luminaires and lampholders, and installed as required by 314.23, shall be permitted to support a luminaire or lampholder. [314.27(A)](https://2023.antflix.net#314.27(A)) | https://2023.antflix.net#314.27(A) |
Chapter 3 Wiring Methods and Materials | 314.27(A)(1) | Boxes used at luminaire or lampholder outlets in or on a vertical surface shall be identified and marked on the interior of the box to indicate the maximum weight of the luminaire that is permitted to be supported by the box if other than 23 kg (50 lb). Exception: A vertically mounted luminaire or lampholder weighing n... | https://2023.antflix.net#314.27(A)(1) |
Chapter 3 Wiring Methods and Materials | 314.27(A)(2) | At every outlet used exclusively for lighting, the box shall be designed or installed so that a luminaire or lampholder can be attached. Boxes shall be required to support a luminaire weighing a minimum of 23 kg (50 lb). A luminaire that weighs more than 23 kg (50 lb) shall be supported independently of the outlet box,... | https://2023.antflix.net#314.27(A)(2) |
Chapter 3 Wiring Methods and Materials | 314.27(B) | Boxes listed specifically for this application shall be used for receptacles located in the floor. Exception: Where the authority having jurisdiction judges them free from likely exposure to physical damage, moisture, and dirt, boxes located in elevated floors of show windows and similar locations shall be permitted to... | https://2023.antflix.net#314.27(B) |
Chapter 3 Wiring Methods and Materials | 314.27(C) | Outlet boxes or outlet box systems used as the sole support of a ceiling-suspended (paddle) fan shall be listed, shall be marked by their manufacturer on the interior of the box as suitable for this purpose, and shall not support ceiling-suspended (paddle) fans that weigh more than 32 kg (70 lb). For outlet boxes or ou... | https://2023.antflix.net#314.27(C) |
Chapter 3 Wiring Methods and Materials | 314.27(D) | Boxes used for the support of utilization equipment other than ceiling-suspended (paddle) fans shall meet the requirements of 314.27(A) for the support of a luminaire that is the same size and weight. Exception: Utilization equipment weighing not more than 3 kg (6 lb) shall be permitted to be supported on other boxes o... | https://2023.antflix.net#314.27(D) |
Chapter 3 Wiring Methods and Materials | 314.27(E) | Outlet boxes required in 314.27 shall be permitted to support listed weight-supporting ceiling receptacles (WSCR). A WSCR shall be used in combination with compatible weight-supporting attachment fittings (WSAF) that are identified for the support of equipment within the weight and mounting orientation limits of the li... | https://2023.antflix.net#314.27(E) |
Chapter 3 Wiring Methods and Materials | 314.28 | Boxes and conduit bodies used as pull or junction boxes shall comply with 314.28(A) through (E). Exception: Terminal housings supplied with motors shall comply with the provisions of 430.12. [314.28](https://2023.antflix.net#314.28) | https://2023.antflix.net#314.28 |
Chapter 3 Wiring Methods and Materials | 314.28(A) | For raceways containing conductors of 4 AWG or larger that are required to be insulated, and for cables containing conductors of 4 AWG or larger, the minimum dimensions of pull or junction boxes installed in a raceway or cable run shall comply with 314.28(A)(1) through (A)(3). Where an enclosure dimension is to be calc... | https://2023.antflix.net#314.28(A) |
Chapter 3 Wiring Methods and Materials | 314.28(A)(1) | In straight pulls, the length of the box or conduit body shall not be less than eight times the metric designator (trade size) of the largest raceway. [314.28(A)(1)](https://2023.antflix.net#314.28(A)(1)) | https://2023.antflix.net#314.28(A)(1) |
Chapter 3 Wiring Methods and Materials | 314.28(A)(2) | Where splices or where angle or U pulls are made, the distance between each raceway entry inside the box or conduit body and the opposite wall of the box or conduit body shall not be less than six times the metric designator (trade size) of the largest raceway in a row. This distance shall be increased for additional e... | https://2023.antflix.net#314.28(A)(2) |
Chapter 3 Wiring Methods and Materials | 314.28(A)(3) | Listed boxes or listed conduit bodies of dimensions less than those required in 314.28(A)(1) and (A)(2) shall be permitted for installations of combinations of conductors that are less than the maximum conduit or tubing fill (of conduits or tubing being used) permitted by Table 1 of Chapter 9. Listed conduit bodies of ... | https://2023.antflix.net#314.28(A)(3) |
Chapter 3 Wiring Methods and Materials | 314.28(B) | In pull boxes or junction boxes having any dimension over 1.8 m (6 ft), all conductors shall be cabled or racked up in an approved manner. [314.28(B)](https://2023.antflix.net#314.28(B)) | https://2023.antflix.net#314.28(B) |
Chapter 3 Wiring Methods and Materials | 314.28(C) | All pull boxes, junction boxes, and conduit bodies shall be provided with covers compatible with the box or conduit body construction and suitable for the conditions of use. Where used, metal covers shall comply with the grounding requirements of 250.110. [314.28(C)](https://2023.antflix.net#314.28(C)) | https://2023.antflix.net#314.28(C) |
Chapter 3 Wiring Methods and Materials | 314.28(D) | Where permanent barriers are installed in a box, each section shall be considered as a separate box. [314.28(D)](https://2023.antflix.net#314.28(D)) | https://2023.antflix.net#314.28(D) |
Chapter 3 Wiring Methods and Materials | 314.28(E) | Power distribution blocks shall be permitted in pull and junction boxes over 1650 cm3 (100 in.3) for connections of conductors where installed in boxes and where the installation complies with 314.28(E)(1) through (E)(5). Exception: Equipment grounding terminal bars shall be permitted in smaller enclosures. [314.28(E)]... | https://2023.antflix.net#314.28(E) |
Chapter 3 Wiring Methods and Materials | 314.28(E)(1) | Power distribution blocks installed in boxes shall be listed. [314.28(E)(1)](https://2023.antflix.net#314.28(E)(1)) | https://2023.antflix.net#314.28(E)(1) |
Chapter 3 Wiring Methods and Materials | 314.28(E)(2) | In addition to the overall size requirement in the first sentence of 314.28(A)(2), the power distribution block shall be installed in a box with dimensions not smaller than specified in the installation instructions of the power distribution block. [314.28(E)(2)](https://2023.antflix.net#314.28(E)(2)) | https://2023.antflix.net#314.28(E)(2) |
Chapter 3 Wiring Methods and Materials | 314.28(E)(3) | Wire bending space at the terminals of power distribution blocks shall comply with 312.6. [314.28(E)(3)](https://2023.antflix.net#314.28(E)(3)) | https://2023.antflix.net#314.28(E)(3) |
Chapter 3 Wiring Methods and Materials | 314.28(E)(4) | Power distribution blocks shall not have uninsulated live parts exposed within a box, whether or not the box cover is installed. [314.28(E)(4)](https://2023.antflix.net#314.28(E)(4)) | https://2023.antflix.net#314.28(E)(4) |
Chapter 3 Wiring Methods and Materials | 314.28(E)(5) | Where the pull or junction boxes are used for conductors that do not terminate on the power distribution block(s), the through conductors shall be arranged so the power distribution block terminals are unobstructed following installation. [314.28(E)(5)](https://2023.antflix.net#314.28(E)(5)) | https://2023.antflix.net#314.28(E)(5) |
Chapter 3 Wiring Methods and Materials | 314.29 | Boxes, conduit bodies, and handhole enclosures shall be installed so that wiring and devices contained in the boxes, conduit bodies, or handhole enclosures can be rendered accessible in accordance with 314.29(A) and (B). [314.29](https://2023.antflix.net#314.29) | https://2023.antflix.net#314.29 |
Chapter 3 Wiring Methods and Materials | 314.29(A) | Boxes and conduit bodies shall be installed so the contained wiring and devices are accessible. [314.29(A)](https://2023.antflix.net#314.29(A)) | https://2023.antflix.net#314.29(A) |
Chapter 3 Wiring Methods and Materials | 314.29(B) | Underground boxes and handhole enclosures shall be installed so they are accessible without excavating sidewalks, paving, earth, or other substance that is to be used to establish the finished grade. Exception: Listed boxes and handhole enclosures shall be permitted where covered by gravel, light aggregate, or noncohes... | https://2023.antflix.net#314.29(B) |
Chapter 3 Wiring Methods and Materials | 314.30 | Handhole enclosures shall be designed and installed to withstand all loads likely to be imposed on them. They shall be identified for use in underground systems. Informational Note: See ANSI/SCTE 77-2013, Specification for Underground Enclosure Integrity, for additional information on deliberate and nondeliberate traff... | https://2023.antflix.net#314.30 |
Chapter 3 Wiring Methods and Materials | 314.30(A) | Handhole enclosures shall be sized in accordance with 314.28(A) for conductors operating at 1000 volts or below, and in accordance with 314.71 for conductors operating at over 1000 volts. For handhole enclosures without bottoms where the provisions of 314.28(A)(2), Exception, or 314.71(B)(1), Exception No. 1, apply, th... | https://2023.antflix.net#314.30(A) |
Chapter 3 Wiring Methods and Materials | 314.30(B) | Underground raceways and cable assemblies entering a handhole enclosure shall extend into the enclosure, but they shall not be required to be mechanically connected to the enclosure. [314.30(B)](https://2023.antflix.net#314.30(B)) | https://2023.antflix.net#314.30(B) |
Chapter 3 Wiring Methods and Materials | 314.30(C) | All enclosed conductors and any splices or terminations, if present, shall be listed as suitable for wet locations. [314.30(C)](https://2023.antflix.net#314.30(C)) | https://2023.antflix.net#314.30(C) |
Chapter 3 Wiring Methods and Materials | 314.30(D) | Handhole enclosure covers shall have an identifying mark or logo that prominently identifies the function of the enclosure, such as "electric." Handhole enclosure covers shall require the use of tools to open, or they shall weigh over 45 kg (100 lb). Metal covers and other exposed conductive surfaces shall be bonded in... | https://2023.antflix.net#314.30(D) |
Chapter 3 Wiring Methods and Materials | 314.70(A) | Where pull and junction boxes are used on systems over 1000 volts, the installation shall comply with Part III and with the following general provisions of this article: Part I, 314.2, 314.3, 314.4, and 314.5Part II, 314.15; 314.17; 314.20; 314.23(A), (B), or (G); 314.28(B); and 314.29Part III, 314.100(A) and (C); and ... | https://2023.antflix.net#314.70(A) |
Chapter 3 Wiring Methods and Materials | 314.70(B) | Where conduit bodies are used on systems over 1000 volts, the installation shall comply with Part III and with the following general provisions of this article: Part I, 314.4, and 314.5Part II, 314.15; 314.17; 314.23(A), (E), or (G); 314.28(A)(3); and 314.29Part III, 314.100(A) and 314.101 [314.70(B)](https://2023.antf... | https://2023.antflix.net#314.70(B) |
Chapter 3 Wiring Methods and Materials | 314.70(C) | Where handhole enclosures are used on systems over 1000 volts, the installation shall comply with Part III and with the following general provisions of this article: Part I, 314.3, 314.4, and 314.5Part II, 314.15, 314.17, 314.23(G), 314.28(B), 314.29, and 314.30 [314.70(C)](https://2023.antflix.net#314.70(C)) | https://2023.antflix.net#314.70(C) |
Chapter 3 Wiring Methods and Materials | 314.71 | Pull and junction boxes and handhole enclosures shall provide approved space and dimensions for the installation of conductors, and they shall comply with the specific requirements of this section. Conduit bodies shall be permitted if they meet the dimensional requirements for boxes. [314.71](https://2023.antflix.net#3... | https://2023.antflix.net#314.71 |
Chapter 3 Wiring Methods and Materials | 314.71(A) | The length of the box shall not be less than 48 times the outside diameter, over sheath, of the largest shielded or lead-covered conductor or cable entering the box. The length shall not be less than 32 times the outside diameter of the largest nonshielded conductor or cable. [314.71(A)](https://2023.antflix.net#314.71... | https://2023.antflix.net#314.71(A) |
Chapter 3 Wiring Methods and Materials | 314.71(B)(1) | The distance between each cable or conductor entry inside the box and the opposite wall of the box shall not be less than 36 times the outside diameter, over sheath, of the largest cable or conductor. This distance shall be increased for additional entries by the amount of the sum of the outside diameters, over sheath,... | https://2023.antflix.net#314.71(B)(1) |
Chapter 3 Wiring Methods and Materials | 314.71(B)(2) | The distance between a cable or conductor entry and its exit from the box shall not be less than 36 times the outside diameter, over sheath, of that cable or conductor. Exception: Where cables are nonshielded and not lead covered, the distance of 36 times the outside diameter shall be permitted to be reduced to 24 time... | https://2023.antflix.net#314.71(B)(2) |
Chapter 3 Wiring Methods and Materials | 314.71(C) | One or more sides of any pull box shall be removable. [314.71(C)](https://2023.antflix.net#314.71(C)) | https://2023.antflix.net#314.71(C) |
Chapter 3 Wiring Methods and Materials | 314.72(A) | Boxes shall be made of material inherently resistant to corrosion or shall be suitably protected, both internally and externally, by enameling, galvanizing, plating, or other means. [314.72(A)](https://2023.antflix.net#314.72(A)) | https://2023.antflix.net#314.72(A) |
Chapter 3 Wiring Methods and Materials | 314.72(B) | Suitable bushings, shields, or fittings having smooth, rounded edges shall be provided where conductors or cables pass through partitions and at other locations where necessary. [314.72(B)](https://2023.antflix.net#314.72(B)) | https://2023.antflix.net#314.72(B) |
Chapter 3 Wiring Methods and Materials | 314.72(C) | Boxes shall provide a complete enclosure for the contained conductors or cables. [314.72(C)](https://2023.antflix.net#314.72(C)) | https://2023.antflix.net#314.72(C) |
Chapter 3 Wiring Methods and Materials | 314.72(D) | Boxes and conduit bodies shall be installed so that the conductors are accessible without removing any fixed part of the building or structure. Working space shall be provided in accordance with 110.34. [314.72(D)](https://2023.antflix.net#314.72(D)) | https://2023.antflix.net#314.72(D) |
Chapter 3 Wiring Methods and Materials | 314.72(E) | Boxes shall be closed by suitable covers securely fastened in place. Underground box covers that weigh over 45 kg (100 lb) shall be considered meeting this requirement. Covers for boxes shall be permanently marked "DANGER - HIGH VOLTAGE - KEEP OUT." The marking shall be on the outside of the box cover and shall be read... | https://2023.antflix.net#314.72(E) |
Chapter 3 Wiring Methods and Materials | 314.72(F) | Boxes and their covers shall be capable of withstanding the handling to which they are likely to be subjected. [314.72(F)](https://2023.antflix.net#314.72(F)) | https://2023.antflix.net#314.72(F) |
Chapter 3 Wiring Methods and Materials | 314.100(A) | Metal boxes, conduit bodies, and fittings shall be corrosion resistant or shall be well-galvanized, enameled, or otherwise properly coated inside and out to prevent corrosion. Informational Note: See 300.6 for limitation in the use of boxes and fittings protected from corrosion solely by enamel. [314.100(A)](https://20... | https://2023.antflix.net#314.100(A) |
Chapter 3 Wiring Methods and Materials | 314.100(B) | Sheet steel boxes not over 1650 cm3 (100 in.3) in size shall be made from steel not less than 1.59 mm (0.0625 in.) thick. The wall of a malleable iron box or conduit body and a die-cast or permanent-mold cast aluminum, brass, bronze, or zinc box or conduit body shall not be less than 2.38 mm (3/32 in.) thick. Other cas... | https://2023.antflix.net#314.100(B) |
Chapter 3 Wiring Methods and Materials | 314.100(C) | Metal boxes over 1650 cm3 (100 in.3) in size shall be constructed so as to be of ample strength and rigidity. If of sheet steel, the metal thickness shall not be less than 1.35 mm (0.053 in.) uncoated. [314.100(C)](https://2023.antflix.net#314.100(C)) | https://2023.antflix.net#314.100(C) |
Chapter 3 Wiring Methods and Materials | 314.100(D) | A means shall be provided in each metal box for the connection of an equipment grounding conductor. The means shall be permitted to be a tapped hole or equivalent. [314.100(D)](https://2023.antflix.net#314.100(D)) | https://2023.antflix.net#314.100(D) |
Chapter 3 Wiring Methods and Materials | 314.101 | Metal covers shall be of the same material as the box or conduit body with which they are used, or they shall be lined with firmly attached insulating material that is not less than 0.79 mm (1/32 in.) thick, or they shall be listed for the purpose. Metal covers shall be the same thickness as the boxes or conduit body f... | https://2023.antflix.net#314.101 |
Chapter 3 Wiring Methods and Materials | 314.102 | Covers of outlet boxes and conduit bodies having holes through which flexible cord pendants pass shall be provided with approved bushings or shall have smooth, well-rounded surfaces on which the cord will bear. Where individual conductors pass through a metal cover, a separate hole equipped with a bushing of suitable i... | https://2023.antflix.net#314.102 |
Chapter 3 Wiring Methods and Materials | 314.103 | Provisions for supports or other mounting means for nonmetallic boxes shall be outside of the box, or the box shall be constructed so as to prevent contact between the conductors in the box and the supporting screws. [314.103](https://2023.antflix.net#314.103) | https://2023.antflix.net#314.103 |
Chapter 3 Wiring Methods and Materials | 314.104 | All boxes and conduit bodies, covers, extension rings, plaster rings, and the like shall be durably and legibly marked with the manufacturer's name or trademark. [314.104](https://2023.antflix.net#314.104) | https://2023.antflix.net#314.104 |
Chapter 3 Wiring Methods and Materials | 315.1 | This article covers the use, installation, construction specifications, and ampacities for Type MV medium voltage conductors, cable, cable joints, and cable terminations. This article includes voltages from 2001 volts to 35,000 volts ac, nominal and 2001 volts to 2500 volts dc, nominal. [315.1](https://2023.antflix.net... | https://2023.antflix.net#315.1 |
Chapter 3 Wiring Methods and Materials | 315.6 | Type MV cables, type MV cable joints, type MV cable terminations, connectors, and associated fittings shall be listed. The listing requirement for Type MV cable joints, cable terminations, and connectors shall be effective January 1, 2026. [315.6](https://2023.antflix.net#315.6) | https://2023.antflix.net#315.6 |
Chapter 3 Wiring Methods and Materials | 315.10 | Type MV cables shall comply with the applicable provisions in 315.10(A) through (C). [315.10](https://2023.antflix.net#315.10) | https://2023.antflix.net#315.10 |
Chapter 3 Wiring Methods and Materials | 315.10(A) | Conductor application and insulation shall comply with Table 315.10(A).
Table 315.10(A) Conductor Application and Insulation Rated 2001 Volts and Higher
Trade Name
Type Letter
Maximum Operating Temperature
Application Provision
Insulation
Outer Covering
Medium voltage solid dielectric
MV-90 MV-105*
90°C 105°C
Dr... | https://2023.antflix.net#315.10(A) |
Chapter 3 Wiring Methods and Materials | 315.10(B) | Thickness of insulation and jacket for nonshielded solid dielectric insulated conductors rated 2001 volts to 5000 volts shall comply with Table 315.10(B).Table 315.10(B) Thickness of Insulation and Jacket for Nonshielded Solid Dielectric Insulated Conductors Rated 2001 Volts to 5000 Volts
Conductor Size (AWG or kcmi... | https://2023.antflix.net#315.10(B) |
Chapter 3 Wiring Methods and Materials | 315.10(C) | Thickness of insulation for shielded solid dielectric insulated conductors rated 2001 volts to 35,000 volts shall comply with Table 315.10(C) and 315.10(C)(1) through (C)(3).Table 315.10(C) Thickness of Insulation for Shielded Solid Dielectric Insulated Conductors Rated 2001 Volts to 35,000 Volts
Conductor Size (AWG... | https://2023.antflix.net#315.10(C) |
Chapter 3 Wiring Methods and Materials | 315.10(C)(1) | Cables shall be permitted to be applied where the system is provided with relay protection such that ground faults will be cleared as rapidly as possible but, in any case, within 1 minute. These cables are applicable to cable installations that are on grounded systems and shall be permitted to be used on other systems ... | https://2023.antflix.net#315.10(C)(1) |
Chapter 3 Wiring Methods and Materials | 315.10(C)(2) | Cables shall be permitted to be applied in situations where the clearing time requirements of the 100 percent level category cannot be met and the faulted section will be de-energized in a time not exceeding 1 hour. Cable shall be permitted to be used in 100 percent insulation level applications where the installation ... | https://2023.antflix.net#315.10(C)(2) |
Chapter 3 Wiring Methods and Materials | 315.10(C)(3) | Cables shall be permitted to be applied under all of the following conditions: In industrial establishments where the conditions of maintenance and supervision ensure only qualified persons service the installationWhere the fault clearing time requirements of the 133 percent level category cannot be metWhere an orderly... | https://2023.antflix.net#315.10(C)(3) |
Chapter 3 Wiring Methods and Materials | 315.12(A) | The minimum size of conductors shall be as shown in Table 315.12(A), except as permitted elsewhere in this Code.
Table 315.12(A) Minimum Size of Conductors
Conductor Voltage Rating (Volts)
Minimum Conductor Size (AWG)
Copper, Aluminum, or Copper-Clad Aluminum
2001-5000
8
5001—8000
6
8001—15,000
2
15,001—... | https://2023.antflix.net#315.12(A) |
Chapter 3 Wiring Methods and Materials | 315.12(B) | Conductors shall be of aluminum, copper-clad aluminum, or copper unless otherwise specified. [315.12(B)](https://2023.antflix.net#315.12(B)) | https://2023.antflix.net#315.12(B) |
Chapter 3 Wiring Methods and Materials | 315.12(C) | Where installed in raceways, conductors not specifically permitted or required elsewhere in this Code to be solid shall be stranded. [315.12(C)](https://2023.antflix.net#315.12(C)) | https://2023.antflix.net#315.12(C) |
Chapter 3 Wiring Methods and Materials | 315.14 | Conductors that are intended for use as ungrounded conductors, whether used as a single conductor or in multiconductor cables, shall be finished to be clearly distinguishable from grounded and grounding conductors. Distinguishing markings shall not conflict in any manner with the surface markings required by 315.16(B)(... | https://2023.antflix.net#315.14 |
Chapter 3 Wiring Methods and Materials | 315.16(A) | All conductors and cables shall be marked to indicate the following information, using the applicable method described in 315.16(B): The maximum rated voltageThe proper type letter or letters for the type of wire or cable as specified elsewhere in this CodeThe manufacturer's name, trademark, or other distinctive markin... | https://2023.antflix.net#315.16(A) |
Chapter 3 Wiring Methods and Materials | 315.16(B) | One or more of the methods in 315.16(B)(1) through (B)(4) shall be used for marking of cable. [315.16(B)](https://2023.antflix.net#315.16(B)) | https://2023.antflix.net#315.16(B) |
Chapter 3 Wiring Methods and Materials | 315.16(B)(1) | Cables shall be durably marked on the surface. The AWG size or circular mil area shall be repeated at intervals not exceeding 610 mm (24 in.). All other markings shall be repeated at intervals not exceeding 1.0 m (40 in.). [315.16(B)(1)](https://2023.antflix.net#315.16(B)(1)) | https://2023.antflix.net#315.16(B)(1) |
Chapter 3 Wiring Methods and Materials | 315.16(B)(2) | Metal-covered multiconductor cables shall employ a marker tape located within the cable and along its complete length. [315.16(B)(2)](https://2023.antflix.net#315.16(B)(2)) | https://2023.antflix.net#315.16(B)(2) |
Chapter 3 Wiring Methods and Materials | 315.16(B)(3) | Metal-covered, single-conductor cables shall be marked by means of a printed tag attached to the reel. [315.16(B)(3)](https://2023.antflix.net#315.16(B)(3)) | https://2023.antflix.net#315.16(B)(3) |
Chapter 3 Wiring Methods and Materials | 315.16(B)(4) | The information required in 315.16(A)(4) shall be permitted to be marked on the surface of the individual insulated conductors for multiconductor Type MC cable. [315.16(B)(4)](https://2023.antflix.net#315.16(B)(4)) | https://2023.antflix.net#315.16(B)(4) |
Chapter 3 Wiring Methods and Materials | 315.16(C) | Cables shall be permitted to be marked to indicate special characteristics of the cable materials, such as limited smoke and sunlight resistance. [315.16(C)](https://2023.antflix.net#315.16(C)) | https://2023.antflix.net#315.16(C) |
Chapter 3 Wiring Methods and Materials | 315.17(A) | All Type MV cable joints, cable terminations, and connectors shall be marked to indicate the following information, using one or more of the methods described in 315.17(B)(l) or (B)(2), and shall be permitted to be optionally marked as described in 315.17(C): The maximum rated voltage.The proper type letter or letters ... | https://2023.antflix.net#315.17(A) |
Chapter 3 Wiring Methods and Materials | 315.17(B) | One or both of the methods in 315.17(B)(1) or (B)(2) shall be used for the marking of cable joints, terminations, or connectors. [315.17(B)](https://2023.antflix.net#315.17(B)) | https://2023.antflix.net#315.17(B) |
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