4.1. In-House Electrical Wiring Cable
4.1.1. Electrical Wiring Type
The Romex brand from General Cable [1] has been used for many residential electrical wirings. Within the Romex brand, NM-B type has been used for indoor branch wiring, and UF-B type, for outdoor use such as the cable to a post light. SE-U or USE-2 can be used as feeder cable for the service entrance. Both NM-B and UF-B cables are constructed with individual THHN cables of class B solid or strands of bare annealed copper conductors with an overall PVC jacket. THHN is derived from the specification of Thermoplastic insulation (PVC), High Heat resistance, and Nylon jacket. The THHN cable has a 90°C rating and is recommended for use at dry or damp locations. NM-B stands for Non-Metallic ...
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