NM wiring methods

[al hildenbrand]

As an interesting side note - 08 Exhibit 314.5 - I have been called out by inspectors for using the first knock out on 2X4 frameing. Two wires in one knock out was OK but needed to use the knock out farthest away from stud.
The 1 1/4" rule for protection from rock screws.

Lightitup,

Here's an even better thread that has a number of photos of what I'm talking about. My photos start at Post 13 in that thread.

 

[lightitup]

Thanks Al, I had not seen those threads before.
I believe most of the inspectors in the Twin Cities call it a violation. At least they did for a while.

I still do not use the first knock out if it's less than 1 1/4"

 

[Dustin Foelber]

stick to the code book

stick to the code book

I have had a number of things in the handbook challenged by inspectors. Best to stick to the code book there is definate conflicts.

 

[millieamp]

Thanks, Maurie for the tip about the UL White Book. So, I guess the verdict is: one cable per clamp. I also have never known about the first knockout rule either. This forum is excellent and an invaluable resource. I just wish the world wasn't so complicated and I want something done about it!

 

[mivey]

..I also have never known about the first knockout rule either...

That's because it is someone's personal rule.

 

[jxofaltrds]

I still do not use the first knock out if it's less than 1 1/4"

The box is not a nailing surface.

 

[LarryFine]

The box is not a nailing surface.

It's not a roto-zipping surface, either, but drywallers don't seem to know that. :roll:

 

[One-eyed Jack]

That is really reaching for a violation IMO - While it is by the wording - If I remember correctly that code section contains the word "likely" and IMO the likelihood is low.... While many of us think rockers are not fit to breath air - the chances of a shiner screw or nail at the average hieght of a receptical is low - since said 'shiner' would need to be a full inch plus off and at just the right hieght.

LOL, I could not agree more!!!!!!

 

[One-eyed Jack]

It's not a roto-zipping surface, either, but drywallers don't seem to know that. :roll:

They think it is a mud support. Then the GC looks at the EC for the large hole around the boxes. None are so blind as those who will not see.