National Electrical Code Quiz, Article 250 Part Twelve Answers

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NEC Quiz: Article 250, Part Twelve Answers

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[250.64(E)]. They have to be electrically continuous.
Table 250.66.
[250.68(B)]. An effective grounding path.
[250.70]. No, unless you use a clamp or fitting listed for use with multiple conductors.
[250, Part IV]. Generally, bond them. What you don't want to create is a difference of potential.

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Additional resources: Contractor Cafe Code Site Illustrated Guide Joe Tedesco's National Electrical Code Residential Pocket Guide

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