Arizona Driving Permit Written Practice Exam

What does 'THWN' insulation indicate regarding wire properties?

Flame, Heat, Water, and Oil resistant Temporary, High-heat, Wet, Neutral Thermal, High-voltage, Wet, Non-metallic None of the above

Flame, Heat, Water, and Oil resistant

THWN stands for Thermoplastic Heat and Water-resistant Nylon-coated, covering flame, heat, water, and oil resistance.

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