NEC Requirements - Eaton

1 NEC Requirements218 NEC RequirementsReprinted with permission from NFPA 70HB14, the national electrical code , Copyright 2014, national Fire ProtectionAssociation, Quincy, MA reprinted material is not the complete and official position of the national Fire Protection Association, on the referencedsubject which is represented only by the standard in its 's B-Line series Enforcement. This Codeis intended to be suitablefor mandatory application by governmental bodies thatexercise legal jurisdiction over electrical installations,including signaling and communications systems, andfor use by insurance inspectors. The authority havingjurisdiction for enforcement of the Codehas the responsibility for making interpretations of the rules, fordeciding upon the approval of equipment and materials,and for granting the special permission contemplated ina number of the rules.

2 By special permission, the authority having jurisdiction may waive specific Requirements in this Codeor permit alternate methods where it isassured that equivalent objectives can be achievedby establishing and maintaining effective safety. *This Codemay require new products, constructions, ormaterials that may not yet be available at the time theCodeis adopted. In such event, the authority havingjurisdiction may permit the use of the products, constructions, or materials that comply with the mostrecent previous edition of this Codeadopted by thejurisdiction. Article 100 - , materials, or services included in alist published by an organization that is acceptable to the authority having jurisdiction and concerned with evaluation of products or services, that maintains periodic inspection of production of listed equipment ormaterials or periodic evaluation of services, and whoselisting states that the equipment, material, or serviceseither meets appropriate designated standards or hasbeen tested and found suitable for a specific.

3 The means for identifying listed equipment may vary foreach organization concerned with product evaluation, some ofwhich do not recognize equipment as listed unless it is of the system employed by the listing organization allowsthe authority having jurisdiction to identify a listed product.* Note: Local codes may override certain Requirements ofthe national electrical code . Consult your local inspectorfor further Requirements219 NEC RequirementsReprinted with permission from NFPA 70HB14, the national electrical code , Copyright 2014, national Fire ProtectionAssociation, Quincy, MA reprinted material is not the complete and official position of the national Fire Protection Association, on the referencedsubject which is represented only by the standard in its 's B-Line series Protection Against Physical subject to physical damage, conductors shallbe adequately protected.

4 (A) Cables and Raceways through Wood Members.(1) Bored Holes.. , holes shall be bored so that theedge of the hole is not less than 32mm (11/4in.) fromthe nearest edge of the wood member. Where this distance cannot be maintained, the cable or racewayshall be protected from penetration by screws or nailsby a steel plate or bushing, at least mm (1/16in.)thick, and of appropriate length and width installed tocover the area of the wiring.(See Figure 1)Exception No. 1: Steel plates shall not be required to protect RMC, IMC, RNC, or No. 2: A listedand marked steel plate less than mm (1/16 in.) thick that provides equal or betterprotection against nail or screw penetration shall be permitted.

5 (2) Notches in Wood.. , cables or raceways shallbe permitted to be laid in notches in wood studs,joists, rafters, or other wood members where thecable or raceway at those points is protectedagainst nails or screws by a steel plate at least (1/16in.) thick, and of appropriate length andwidth, installed to cover the area of the wiring. Thesteel plate shall be installed before the building finish is applied. (See Figure 1)Exception: See Exceptions 1 & 2 from (1) Bored Holes(B) Nonmetallic-Sheathed Cables and ElectricalNonmetallic Tubing through Metal FramingMembers.(1) Nonmetallic-Sheathed Cable.. where nonmetallic-sheathed cables pass through eitherfactory or field punched, cut or drilled slots or holesin metal members, the cable shall be protected by listed bushings or listed grommets covering allmetal edges that are securely fastened in the opening prior to installation of the cable.

6 (See Figure 2)(2) Nonmetallic-Sheathed Cable and ElectricalNonmetallic Tubing. Where nails or screws arelikely to penetrate nonmetallic-sheathed cable orelectrical nonmetallic tubing, a steel sleeve, steelplate, or steel clip not less than mm (1/16in.) in thickness shall be used to protect the cable or tubing. (See Figure 1)Exception: See Exception 2 from (A)(1) Bored HolesNEC RequirementsNEC Requirements220 NEC RequirementsReprinted with permission from NFPA 70HB14, the national electrical code , Copyright 2014, national Fire ProtectionAssociation, Quincy, MA reprinted material is not the complete and official position of the national Fire Protection Association, on the referencedsubject which is represented only by the standard in its 's B-Line series (D) Cables and Raceways Parallel to Framing Membersand Furring Strips.

7 , the cable or race way shallbe installed and supported so that the nearest outsidesurface of the cable or raceway is not less than 32 mm(11/4in.) from the nearest edge of the framing member or furring strips where nails or screws arelikely to penetrate. Where this distance cannot bemaintained, the cable or raceway shall be protectedfrom penetration by nails or screws by a steel plate,sleeve, or equivalent at least mm (1/16in.) thick(See Figures 1, 3, 4)Exception No. 1: See Exception 1 from (A)(1) Bored HolesException No. 2: For concealed work in finished buildings, or finished panels for prefabricated buildingswhere such supporting is impracticable, it shall be permissible to fish the cables between access No.

8 3: See Exception 2 from (A)(1) Bored Holes(F) Cables and Raceways Installed in Shallow .. , shall be protected by mm (1/16in.) thick steelplate, sleeve, or equivalent or by not less than 32 mm(11/4in.) free space for the full length of the groove inwhich the cable or raceway is installed.(See Figure 1)Exception: See Exceptions 1 & 2 from (A)(1) Bored HolesFigure 1 - BM3 & BM3 MFigure 3 - BRC4 & BRC6 MFigure 2 - BM1/BM2 Figure 4 - BX4 NEC Requirements221 NEC RequirementsReprinted with permission from NFPA 70HB14, the national electrical code , Copyright 2014, national Fire ProtectionAssociation, Quincy, MA reprinted material is not the complete and official position of the national Fire Protection Association, on the referencedsubject which is represented only by the standard in its 's B-Line series Securing and Supporting.

9 (A) Secured in Place. Raceways, cable assemblies, boxes, cabinets, and fittings shall be securely fastenedin place. Support wires that do not provide secure support shall not be permitted as the sole support. Support wires and associated fittings that provide secure support and that are installed in addition to the ceiling grid support wires shall be permitted as the sole support. Where independent support wires are used, they shall be secured at both ends. Cables and raceways shall not be supported by ceiling grids.(1) Fire Rated Assemblies. Wiring located within the cavity of a fire-rated floor-ceiling or roof-ceiling assembly shall not be secured to, or supported by, the ceiling assembly, including the ceiling support wires.

10 An independent means of secure support shall be provided and shall be permitted to be attached to the assembly. Where independent support wires are used, they shall be distinguishable by color, tagging, or other effective means from those that are part of the fire-rated design. Exception: The ceiling support system shall be permitted to support wiring and equipment thathave been tested as part of the fire-rated assembly.(2) Non-Fire-Rated Assemblies. Wiring located within the cavity of a non-fire-rated floor-ceiling or roof-ceiling assembly shall not be secured to, or supported by, the ceiling assembly, including the ceiling support wires.