Article 310 Scope and 310.6

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Natfuelbilll

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Clearly, Article 310 scope cover general wiring, and not for certain wiring in some equipment.

310.6 requires shielded cable for general wiring for 4160V on a project.

Here is the question. Is shielded cable required for connecting an additional 4160V switch onto an existing 4160V fused switch lineup? Would these jumpers be considered "general wiring"?

The other choices are to use copper buss and insulators or unshelled 5kV cable. Would the unshielded be allowed by your AHJ?

Thoughts?
 
I think you meant 300.3(C)(2), and that is only for where over 600V conductors are used in the same enclosure, raceway, or cable with conductors of circuits rated 600 volts, nominal, or less. See Article 310, Part II for over 600V requirements.
 
Natfuelbilll said:
I am referring to 310.1(B) and 310.6

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There is no 310.1(B), nor 310.6...????

Perhaps 310.10(E)...?

The question is if field installed wiring within equipment is considered "integral to the equipment"
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OP did not indicate one enclosure. If the conductor is or will be contained in more than one enclosure, that makes their point moot.
 
The existing gear has buss. The new switch and the existing gear each have an opening 18" wide and 12" tall that line up with each other. The opening is meant for buss. The distance between the existing buss and new switch lugs is too short to fit shielded cable with the correct stress ends.

Because NEC 2008 310 is for GENERAL WIRING, the question is if the shielded wire is not required, and unshielded would be permissible.
 
Natfuelbilll said:
The existing gear has buss. The new switch and the existing gear each have an opening 18" wide and 12" tall that line up with each other. The opening is meant for buss. The distance between the existing buss and new switch lugs is too short to fit shielded cable with the correct stress ends.

Because NEC 2008 310 is for GENERAL WIRING, the question is if the shielded wire is not required, and unshielded would be permissible.
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Natfuelbilll said:
Of course the buss could be extended with buss

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Sounds like your talking about sections of switchgear. As long as bussing is available, that's what I'd opt for.
 
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