Branch Circuits & WiringQuestion 224 of 521
Per 320.40, what must be installed at each termination of Type AC (armored) cable to protect the conductors from the cut edge of the metal armor?
a.A grounding bushing
b.A locknut
c.A cable connector only
d.An anti-short insulating bushing ("red head")
Explanation
Section 320.40 requires an insulating anti-short bushing, commonly called a red head, at each armored-cable termination to protect the conductor insulation from the sharp armor. A locknut or connector alone does not protect against the cut armor edge, and a grounding bushing serves a different purpose.
Law Reference: 2023 NEC §320.40Practice all 521 questions free — no signup required.
Related questions on this topic
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- Per 320.30, Type AC cable must be secured and supported at intervals not exceeding what distance?
- Which cable relies on its metal armor together with an internal aluminum bonding strip to serve as the equipment grounding path?
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