old work boxes for wall sconces

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I'd just use the madison bars and a 4" round or regular old work box. It is not going to be a problem. Why does everything have to be so difficult?
 
What about the spray foam trick I learned about on here? I've never tried it, and if mad bars aren't legal, I'm sure this isn't! ;-)
 
I don't see why you could not use a plastic bow with MC cable... Just use a bonding locknut and bond the outer jacket to the EGC. They even used to make plastic boxes with with metal internal components for this purpose.

NOTE: this is not my normal M.O. But I do work for a designer who uses the craziest luminaires, which require creative, yet code compliant, mounting and connection.
 
iwire said:
UL lists them as "Outlet and Flush Device Supports" (QCRV)

Now if we want to talk abut something lets talk about using drywall as a structural element. :grin:

I think we will find that the drywall manufacturers prohibit using drywall to support equipment.
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Iwire I dont know how you do it that white book is worse than 5 nec's
BUT i dont see madison bars in qcrv

help me out
 
ibew501ed said:
Iwire I dont know how you do it that white book is worse than 5 nec's
BUT i dont see madison bars in qcrv

help me out
Click to expand...

UL is not going to call them madison bars, IMO "Box supports" would cover things from 'Mad Bars' to Caddy H2-3s, to Caddy 512 HDs etc. etc.
 
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