Anyone ever get failed for to many wires in a drilled hole?

[danickstr]

I never have, but i remember someone here saying that drilled holes can only be filled to 60%. I know I have put more than that in them but have never had it brought to my attention buy an inspector.

 

[bighills]

Yes. Manalapan NJ. no more than two wires in a hole if it is an exterior wall. He cited some fire code. Ed Reed was the inspector.

 

[LarryFine]

I haven't. I'm either lucky or attentive.

 

[mcclary's electrical]

I never have, but i remember someone here saying that drilled holes can only be filled to 60%. I know I have put more than that in them but have never had it brought to my attention buy an inspector.

If more than 2 nm cables are going in a hole to be fire stopped or draft stopped, derating will apply.

If you're not draft stopping or fire stopping, you don't have to worry about it

 

[SEO]

I've heard of it as well.

 

[220/221]

They don't fail here.


Seems like if you stuff the hole full of romex, you don't need firestop :grin:

 

[mcclary's electrical]

Paul Abernathy will fail you at the drop of a hat for exceeding the fill of a fire stopped hole.

 

[mivey]

Paul Abernathy will fail you at the drop of a hat for exceeding the fill of a fire stopped hole.

Heck,
Paul Abernathy will fail you at the drop of a hat. :grin:

 

[Pierre C Belarge]

There are no code references that I am aware of, unless they are local codes. I have looked through the ICC fire code, and cannot find a reference.
The firestopping issue is for NM cables.

 

[Pierre C Belarge]

If more than 2 nm cables are going in a hole to be fire stopped or draft stopped, derating will apply.

If you're not draft stopping or fire stopping, you don't have to worry about it

Up to 9 ccc it will not affect the final ampacity of the NM cable conductors in general. After 9 ccc then one has to plan.

 

[LarryFine]

Paul Abernathy will fail you at the drop of a hat for exceeding the fill of a fire stopped hole.

Heck,
Paul Abernathy will fail you at the drop of a hat. :grin:

I'm saying nothing. I do work in Richmond.

 

[electricmanscott]

Up to 9 ccc it will not affect the final ampacity of the NM cable conductors in general. After 9 ccc then one has to plan.

For some reason this always seems to be lost on people.

 

[mcclary's electrical]

Up to 9 ccc it will not affect the final ampacity of the NM cable conductors in general. After 9 ccc then one has to plan.

With all due respect Pierre,,,,,,,,You're worng.
334.80
310.15 (B) 2 a

 

[mcclary's electrical]

I'm saying nothing. I do work in Richmond.

Smart man!
I respect Paul (hopin he reads this!)

 

[electricmanscott]

With all due respect Pierre,,,,,,,,You're worng.
334.80
310.15 (B) 2 a

I agreed with Pierre so I'll let him explain. :grin:

 

[mivey]

I agreed with Pierre so I'll let him explain. :grin:

Me too!

 

[Buck Parrish]

me three,...............

 

[mcclary's electrical]

Me too!

I now understand what he meant, I thought he meant derating did not apply,,,,it does apply it just does not affect the breaker size until you get over 9ccc's

EX. 310.16 says 14 is good for 25 amps
334.80 says that if more than two nm cables pass through a hole to be fire stopped, than 310.15 (b) (2) (a)

310.15 b2a says 4-6 CCC derate to 80%=20
7-9 CCC derate to 70% = 17.5

So he's right, I misunderstood him. I thought he meant derating does not apply, it does, but it doesn't affect normal breaker size until you get over 9 CCC

 

[LarryFine]

EX. 310.16 says 14 is good for 25 amps

I thought NM was to be rated per the 60-deg column.

14 = 20a
12 = 25a

 

[electricmanscott]

I thought NM was to be rated per the 60-deg column.

14 = 20a
12 = 25a

For derating purposes use the 90 degree column