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How many 14/2 or 12/2 romexcan you run through 3/4" holes drilled thrugh wooden framing?

Thanks,
Eric
 

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Licensed Electrical Cont.
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You'll get conflicting answers to this, but the bottom line is you can pull up to four cables, sized #14,#12 or #10, through a bored hole before you have to worry about derating.
 

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Resi EC
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Both Speedy and bob are correct, however, in my neck of the woods my inspectors only like to see two romex per hole. (irregardless of hole size or wire size)
They don't go on the derating, they go on bundling, may want to check with your local building division before you have to re-do something.
 

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Licensed Electrician
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I'm curious why the building code would determine how many cables can go thru the hole. I would think the size of the hole would matter to the building dept, but not the number of cables.
 

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(irregardless of hole size or wire size)
Irregardless is not a word. I hear people use it all the time and it would be rude to tell them in person. Since we're on a forum, I thought I'd mention it. People who realize this tend to giggle at people who use it. Kind of like saying for all intensive purposes instead of intents and purposes. :wink:

People will argue it's a word, but I avoid it anyway.
 

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Both Speedy and bob are correct, however, in my neck of the woods my inspectors only like to see two romex per hole.
I always laugh when folks say "my inspectors like to see".
I don't give a crap what they "like" to see.
What is the code? Is it open to interpretation? THAT is what they can see, NOTHING more.
 
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Resi EC
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yeah, I know
But, I personally can't see pulling 4, 10-2 w/g through a 7/8" hole.
It's tough enough just getting 4, 14-2 w/g.
If we do everything to code why have inspections?


He also believes that in larger homes with more than 2 bathrooms, it should be split into two different circuits. It was only a suggestion, but that and kitchens will have the larger loads.
Maybe we should never listen to inspectors, they're not the ones that will have to fix it anyway.

I didn't realize grammar was a prerequisite of electrical work, I'll make a guess that not all of us are collage graduates. So please forgive my ignorance
 

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What in the hell are you running FOUR 10/2's to in a house??
 

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E2 Electrician
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How many 14/2 or 12/2 romexcan you run through 3/4" holes drilled thrugh wooden framing?

Thanks,
Eric
IF the hole isn't being firestopped, as many as you like... if it is being firestopped, then you have to be concerned about 9 current carrying conductors per hole.

As a rule of thumb, i generally stick to 3-4 cables per hole, depending on straightness of holes and other variables.
 

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Resi EC
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You'll get conflicting answers to this, but the bottom line is you can pull up to four cables, sized #14,#12 or #10, through a bored hole before you have to worry about derating.

2 - water heaters
1 - heat pump
60a, 30a 15kw furnace

But mainly I was going off your post
 

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" Euro " electrician
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No derating until 24 ".

Explain this please?
I know what is ment by derating. But not until 24 ".:huh:
I also would like an elaboration
Very simple the heating effect on the conductors when you get more than 23.9 inches the derating can be in effect espcally if you have large numbers of cable or conductors and it is more than 24 inches the derating do kick in and it will reduce the current carry rating a bit depending on numbers of conductors or cable in the hole or in conduit.

Merci.
Marc
 
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