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Article ? of the NEC states that RMC shall be supported every ? and within ? of each junction box.

1) 344 / 10' / 1'
2) 344 / 10' / 3'
3) 356 / 10' / 6"
4) 356 / 10' / 2'

Answer :

Final answer:

The NEC requires RMC to be supported at specific intervals and distances.

Explanation:

The subject of this question is engineering as it pertains to electrical installation. Specifically, it references the National Electrical Code (NEC), which is a standard for electrical installations in the United States. The question is asking about the requirements for supporting RMC (rigid metal conduit), which is a type of electrical conduit used to protect and route electrical wiring.

The correct answer is option 2) 344 / 10' / 3'. According to Article 344 of the NEC, RMC must be supported at intervals not exceeding 10 feet and within 3 feet of each junction box. This is to ensure the stability and proper installation of the conduit.

These requirements help to prevent excessive bending, sagging, or movement of the conduit, which could lead to damage to the wiring inside and potential safety hazards. By following these guidelines, electricians can ensure a safe and efficient electrical installation.

Learn more about Electrical installation here:

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