old work boxes for wall sconces

[electricmanscott]

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?

 

[frankft2000]

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! ;-)

 

[electricmanscott]

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 still don't know why mad bars wouldn't be legal. Not that it would stop me either way.

 

[Article 90.1]

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.

 

[ibew501ed]

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.

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

 

[iwire]

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

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.