Question on NM cable entering a box

[Jim W in Tampa]

Not sure, but the MA Amendments to the NEC allows .75" instead of 1.25".

Tom


Edited: Sheetrock brand drywall specifies 1.25" bugle type screws to attach to stud. IMO most drywall(not all) is .5" so .75" clearance is close.

I assume you have never hung drywall.The head of the screw is recessed into the drywall.But they are not the ones that cause the problems.Think about the ones that miss the stud.Many years ago we stapled romex to the side of 1x2 on block walls.Seldom got hit.Dont try that today.There are probably millions of old romex wires with screws hitting one of the wires and some going thru neutral and ground only.Without afci or gfci they have no reason to trip a breaker.Romex is the least safe wiring system we have.It is the cheapest and thats why its used.

 

[Davis9]

I actually have hung drywall in the past. I agree that all Hanger's are not perfect, but here in MA we are allowed .75" in our code.

Tom

 

[Jim W in Tampa]

I actually have hung drywall in the past. I agree that all Hanger's are not perfect, but here in MA we are allowed .75" in our code.

Tom

And i do see there math as making it seem ok.That allows nothing for the screw that misses the stud.Many of the fast hangers will simply knock that screw in even further with the handle of the puddy knife.At risk of showing my age i will admit to my first job being a rock lath hanger and that new fangled drywall stuff was brand new.LOL

 

[Davis9]

And i do see there math as making it seem ok.That allows nothing for the screw that misses the stud.Many of the fast hangers will simply knock that screw in even further with the handle of the puddy knife.At risk of showing my age i will admit to my first job being a rock lath hanger and that new fangled drywall stuff was brand new.LOL

That's why we became Electricians!LOL

Tom

Although I've never hung rock lathe, I've torn down my fair share.

 

[allenwayne]

Isn`t it called plaster lath ???? I have also torn down my share of it.

 

[infinity]

Isn`t it called plaster lath ???? I have also torn down my share of it.

There are different types of lath.

Rock Lath is like 3/8" sheetrock with holes in it and it gets about a 3/8" coating of plaster.

Wood Lath is the 1 1/2" strips of wood nailed to the studs with a gap in the middle to hold the plaster coating.

Wire Lath is a wire mesh that gets a coating of plaster right over it. Wire lath is usually used over the rock lath in the corners to prevent cracking of the plaster top coat.