Minimum bending radius for cable less than 600V

[pmunroe]

This has been asked about before, but I wondered if anyone knew anything new about a topic in the NEC that specifically addresses minimum bending radii for cable less than 600V. Section 300.34 specifically spells out requirements for cable over 600V which implies there must be something, somewhere, specifically addressing the other cables in the book. Why be so specific about one voltage class and say nothing about the other?

I'd appreciate anyone's insight and thanks for reading.

 

[hbiss]

Re: Minimum bending radius for cable less than 600V

Article 725 and 800 cover low voltage. Class 1 circuits would refer beck to chapter 3 so bending radii would be addressed there if necessary. For CL3, CL2, communications, etc there is not much of a safety problem associated with tight bends so the NEC does not address it. This would be an operational issue in many cases especially with data and coax and the place to look for requirements would be the manufacturers literature.

-Hal

 

[tom baker]

Re: Minimum bending radius for cable less than 600V

This is more of a performance issue than an NEC issue. About the only nec requirement would be 110.3(B), for the 1999 NEC there was a reference to EIA/TIA 568 (telecom specs) but it was removed in the 2002 edition.

 

[websparky]

Re: Minimum bending radius for cable less than 600V

Yes.

Look in Chapter 3 under xxx.24 Bending Radius.

10, 7 and 5 times are specified.