338.10(B)(4)(b) says to support in accordance with 334.30:
334.30 Securing and Supporting.
Nonmetallic-sheathed cable shall be supported and secured by staples,
cable ties, straps, hangers, or similar fittings designed and installed
so as not to damage the cable, at intervals not exceeding 1.4 m (4.5 ft)
and within 300 mm (12 in.) of every outlet box, junction box, cabinet,
or fitting. Flat cables shall not be stapled on edge.
Sections of cable protected from physical damage by raceway shall not be
required to be secured within the raceway.
Andrew Truitt wrote:
Does anyone know the maximum support spacing for conductors in free air
and what code section addresses it? I'm thinking of USE-2 or PV Wire
being run in loop hangars along purlins under an array.
Thanks in advance!
For a brighter energy future,
Andrew Truitt
Principal
TruittRenewableEnergyConsulting
NABCEP Certified PV Installer™ (ID# 032407-66)
<tel:%28202%29%20486-7507>(202) 486-7507 <tel:%28202%29%20486-7507>
http://www.linkedin.com/pub/andrew-truitt/8/622/713
<http://www.linkedin.com/pub/andrew-truitt/8/622/713>
24 copy.jpg
"Don't get me wrong: I love nuclear energy! It's just that I prefer
fusion to fission. And it just so happens that there's an enormous
fusion reactor safely banked a few million miles from us. It delivers
more than we could ever use in just about 8 minutes. And it's wireless!"
~William McDonough
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