MC Cable for lighting whip

[KMark5710]

What's the maximum length for a lighting whip using MC Cable? WVSFM is saying 6'. Looked at 330-30. Seems the only distance requirement is for supporting MC cable every 6'.

 

[infinity]

Is the whip a fixture tap utilizing smaller tap conductors?

 

[KMark5710]

No, #12 MC Cable

 

[roger]

No, #12 MC Cable

Then it's as you said in your first post, you only need to provide the proper supporting and it can be as long as the roll of MC you have.

Roger

 

[JDBrown]

What's the maximum length for a lighting whip using MC Cable? WVSFM is saying 6'. Looked at 330-30. Seems the only distance requirement is for supporting MC cable every 6'.

In facilities where they want all wiring to be in conduit (RMC or EMT), it's pretty common to have a requirement like this written into the specs, limiting the length of flexible whips. But there's no Code requirement like this that I've ever heard of.

Is the WVSFM citing a specific Code section? Are there State amendments to the NEC (or maybe to the Fire Code)?

 

[KMark5710]

WVSFM isn't citing any codes.

 

[infinity]

No, #12 MC Cable

Since this is branch circuit wiring you would need to comply with 330.30(D)(2).

(D) Unsupported Cables. Type MC cable shall be permit-
ted to be unsupported where the cable:
(2) Is not more than 1.8 m (6 ft) in length from the last
point of cable support to the point of connection to
luminaires or other electrical equipment and the cable
and point of connection are within an accessible ceil-
ing. For the purpose of this section, Type MC cable
fittings shall be permitted as a means of cable support