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Wire ampacity chart6/11/2023 ![]() Copperweld ® NM-B is made with ASTM B-566 Copper-Clad Aluminum bare wire, which carries its own component listing, RU DVVU2. Ensure secure connection limiting wire deformation. When terminating to panel lugs and wiring devices, torque to 12 to 14 lbf-in. Torque until the wires are tight under the cap and visibly twisted together two times outside of the cap to ensure electrical contact. When terminating with twist-on splice connectors, pre-twisting is not recommended. Identified for use with wiring devices, splice connectors and equipment terminals rated for Cu, Cu/Al and CO/ALR. Type NM-B is rated 600-volt for both exposed and concealed work in dry locations, as defined by the National Electrical Code. Per Article 590, Copperweld ® NM-B can be used in temporary installations as feeders and branch circuits for power and lighting. It must not be installed in locations exposed to corrosive fumes or vapors. Copperweld NM-B must be protected from physical damage per Article 300.4 of the NEC. It cannot be used as a service entry cable, nor can it be buried. It may be used as the primary electrical conductor for the residential branch circuit system, providing service for outlets, switches and 240 Volt appliance loads. Copperweld ® NM-B cable should be sized per NEC ampacity table 310.16 using the 60☌ column. It may only be used in dry locations for indoor wiring. Wiring Methods: Per Article 334 of the NEC, Copperweld ® Type NM-B shall not be used in wet or damp locations where an electrolyte might be present. Colors according to industry norms and specific application. NM-B Jacket - Made with 30-mil flame retardant and moisture resistant PVC to safety listing standards. For NM-B 8 AWG sizes and larger: ground will be 8 AWG, solid, annealed. Grounding Conductor - For NM-B 12-10 AWG sizes: ground will be 12-10 AWG, solid, annealed conductor. For 8 AWG sizes and larger, stranded annealed THHN Copper-Clad Aluminum with solid Copper-Clad Aluminum ground.Ĭonductor Insulation - Color-coded Polyvinyl Chloride (PVC) compound meeting the required thickness of Type THHN or THWN-2 with a heat-stabilized Nylon jacket rated for 90☌ in dry locations. Cu-Clad Aluminum (CCA) Conductor - Drawn from a copper-clad aluminum rod, with the copper metallurgically bonded to an AA 8000 series aluminum core, where oxygen-free copper forms a minimum of 10 percent of the cross-sectional area of a solid conductor or each strand of a stranded conductor.Īpplication Standards - UL (UL-83, UL-719, UL-1581, UL-2556) NFPA 70 (NEC ®) Article 334 ASTM-B-566 NEMA RV 2-2011Ĭonductors - For wire sizes 12-10, solid annealed THHN Copper-Clad Aluminum with solid Copper Clad Aluminum ground.
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