NEC 310.12 Table: Wire Sizes For 100-400 Amp Services (83% Rule)

310.12 nec wire gauges

310.12 NEC table discusses copper and aluminum wire sizes for 100 amp to 400 amp services and feeders. This relates to most households (National Electrical Code refers to homes using these terms: one-family dwellings, 2-family dwellings, and multifamily dwellings). Namely, the NEC section 310.12 includes these 5 distinct parts: Tabel 310.12 Single-Phase Dwelling Services and … Read more

THHN Vs THWN vs THWN-2 Wires: What Is THWN Wire Anyway?

When it comes to wires, there is quite a lot of confusion. Especially regarding the acronyms. Case and point: What is a THWN wire? What is the difference between THHN and THWN wire? Let’s address both of these questions to get a little clearer vision about wires. THWN stands for Thermoplastic Heat and Water-resistant Nylon-coated … Read more