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#17076 - 11/20/02 10:04 AM romex, used on a solid block wall ?
mj Offline
Member
Registered: 06/10/02
Posts: 188
Loc: meriidian, ms
an electrical contractor wants to use romex to rewire a house that has solid block walls. the walls will be coverd with sheetrock, about 1 inch hollow will be between the sheetrock in the block wall. have you guys ever hear of such a wiring pratice? any advice ? any code violations in the above procedure ?
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#17077 - 11/20/02 11:35 AM Re: romex, used on a solid block wall ?
Wirenuttt Offline
Member
Registered: 11/10/02
Posts: 267
Loc: Massachusetts
I know there has to maintain an 1 1/4" space between romex and finish surfaces. I believe m/c falls in the same class. I would prefer emt with surface mount 4" sq's and apply the proper plaster ring to finsh surface.
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#17078 - 11/20/02 01:25 PM Re: romex, used on a solid block wall ?
HotLine1 Offline


Member
Registered: 04/03/02
Posts: 6833
Loc: Brick, NJ USA
MJ:
Besides the romex situation, what kind of box is the installer proposing???
From your post, I assume that furring strips aregoing to be fastened to the block wall, and sheetrock will be attached to the furring strips. You cannot staple/strap the RX to the furring strip sides, as you cannot maintain 1 1/4" of clearance to prevent nail damage. 1/2" EMT would work, but you have to install a box.
John
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#17079 - 11/20/02 02:29 PM Re: romex, used on a solid block wall ?
mj Offline
Member
Registered: 06/10/02
Posts: 188
Loc: meriidian, ms
thanks,hotline... i forgot about the 1 1/4 rule and also the depth for the boxes.
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#17080 - 11/20/02 02:57 PM Re: romex, used on a solid block wall ?
resqcapt19 Offline
Member
Registered: 11/10/00
Posts: 2209
Loc: IL
Guys,
What code section can you cite for this application?
Don
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#17081 - 11/20/02 03:13 PM Re: romex, used on a solid block wall ?
sparky Offline
Member
Registered: 10/18/00
Posts: 5545
thank you Don,

(i guess we have an inherent 1 1/4" fixation ....)

300.4(D) states framing members, such as 'joists, rafters or studs'....does 'such as' also include furring strips??
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#17082 - 11/20/02 03:59 PM Re: romex, used on a solid block wall ?
sparky66wv Offline
Member
Registered: 11/17/00
Posts: 2342
Loc: West Virginia
I've always used 1-1/2" Deep 4x4s and 1/2" (or 5/8") plaster rings. 3/4" EMT for physical protection of the NM-B Cable up to the area above the ceiling.

Don, please let me know if this is overboard, it's darned expensive on a bid job!
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#17083 - 11/20/02 04:03 PM Re: romex, used on a solid block wall ?
resqcapt19 Offline
Member
Registered: 11/10/00
Posts: 2209
Loc: IL
Sparky,
I think that is the way to go, but I just can't find a code citation to require that type of protection for this appliction.
Don
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Don(resqcapt19)
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#17084 - 11/20/02 04:30 PM Re: romex, used on a solid block wall ?
sparky Offline
Member
Registered: 10/18/00
Posts: 5545
i do the same Virgil, with these on the cieling end;



btw;
have you guys seen those who run nm aside furring strips on cielings? not my cup of tea, yet i do not believe in violation..
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#17085 - 11/20/02 04:34 PM Re: romex, used on a solid block wall ?
sparky66wv Offline
Member
Registered: 11/17/00
Posts: 2342
Loc: West Virginia
Dude! Where do you get those!

I use emt connectors and remove the locknut, put on a bushing, and make sure it's stapled within 12".

Those are awesome! I wonder if my supplier has 'em?

[This message has been edited by sparky66wv (edited 11-20-2002).]
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Member IAEI
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