An electrician is installing 4 AWG THHN conductors that enter a metal junction box through a raceway. According to NEC 300.4(G), which of the following is required to protect the conductors from abrasion?
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A
A standard metal locknut is sufficient if tightened securely.
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B
The conductors must be wrapped with electrical tape at the point of entry.
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C
A fitting with a smoothly rounded insulating surface must be installed before the conductors.
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D
The raceway must be a nonmetallic type to avoid sharp edges.