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Electrical and Plumbing Rough-In Basics
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What is the primary purpose of the thin, outer nylon jacket layer on THHN electrical wire?
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Hint
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50-50
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Audience
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A
To provide physical protection and reduce friction during wire pulling
B
To act as the primary voltage insulation barrier
C
To make the wire completely impervious to high heat
D
To color-code the wire for identification
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