Securing and Supporting NEC 330.30 (B)

[Jamar]

500 kcmil MC-HL first support outside of a panel box or penetration.

a) 12"

b) 3 ft.

c) 6ft.

Please explain your answer.

NEC Code only


It's an argument I have on every new job. Not only with other journeyman bit with QC's and QA's.

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[Jamar]

500 kcmil is just an example. Let's assume it's 3/C

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[Smart $]

ANSWER: c) 6 ft.

330.30(B), first sentence permits up to 6 ft intervals. Second sentence does not apply for larger than 10 AWG. Third sentence as of 2014 edition, 250kcmil and larger installed vertically the distance can be up to 10 ft.

 

[Jamar]

ANSWER: c) 6 ft.

330.30(B), first sentence permits up to 6 ft intervals. Second sentence does not apply for larger than 10 AWG. Third sentence as of 2014 edition, 250kcmil and larger installed vertically the distance can be up to 10 ft.

Exactly. Thanks


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