Why do i have colonial flex type nm 600 volts 14/2 ground wire in hot water baseboard heater6/29/2023 ![]() ![]() These characteristics make THHN wire an excellent choice for controlling outdoor factors that would otherwise alter the performance of wire cable. The different letters in THHN wire denote particular properties of the cable:įor wire also rated as THWN: Thermoplastic Heat and Water Resistant Nylon Coated. ![]() See 110.14(C), 240.4(D) and 310.15(B) for other limitations where applicable THHN Wire Properties *Ampacity of conductors are based on the National Electrical Code (NFPA 70) Table 310.15(B)(16). ![]()
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