How many romex in one hole

If you end up drilling joits read before drilling. Speedy Petey Well-known member. Click to expand This means 1" holes in 2x4's would need to be dead center and dead straight. The key here is nine CCC's, or current carrying conductors hot and neutral. Once you get over nine you run into issues. MushCreek Well-known member. Speedy Petey said:. This is SO not true! Code is code, not what the inspector wants or makes up. It's his job to enforce it, not invent it.

That's why they are technically called "Code Enforcement Officers". What is in the amendments? Usually just piddly little stuff, but the point is is that local codes can and do vary from 'standard' codes. Ya have to ask the locals to be sure.

Notgrownup Well-known member. I always call them if I doubt Some sub standard practices out there Slowgsr Well-known member. Joined Nov 14, Messages Location Southern ontario.

Not required for horizontal runs unless you are penetrating a firewall. Last edited: Jan 2, Location Mike P. Coppersmith said:. I agree with Rob. There are two things going on here: 1st is whether derating applies. To expand on the former, the code references are This gets into what exactly "without maintaining spacing" means which will have different interpretations. Regarding the latter, as noted but put another way, just because you have to derate, doesnt mean it will change anything in practice until you get over 9 CCC for sizes 12 and Location Bremerton, Washington.

I am not sure where the 2 cable limit started, its almost like MC cable requires a red head. I am not sure where the 2 cable limit started , its almost like MC cable requires a red head. If you look at Table Table So with the information from Table The math is quite simple.

Which shows that you can have between 7 and 9 current carrying conductors through the bored hole, before the wires are derated below 20 amperes from Table Where more than two NM cables containing two or more current-carrying conductors are installed, without maintaining spacing between the cables, through the same opening in wood framing that is to be fire- or draft-stopped using thermal insulation, caulk, or sealing foam, the allowable ampacity of each conductor shall be adjusted in accordance with Table Where more than two NM cables containing two or more current-carrying conductors are installed in contact with thermal insulation without maintaining spacing between cables, the allowable ampacity of each conductor shall be adjusted in accordance with Table B Tables.

Where the number of current-carrying conductors in a raceway or cable exceeds three, or where single conductors or multiconductor cables are installed without maintaining spacing for a continuous length longer than mm 24 in. Each current-carrying conductor of a paralleled set of conductors shall be counted as a current-carrying conductor. Where conductors of different systems, as provided in Sign up to join this community. The best answers are voted up and rise to the top.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. So any bundling is bundling [related to ], therefore bound by a hole in wood is bundling.

Ironically enough when you do get involved with the derating of the NM Cable for the examples you all are giving…and end up using 90 degree for derating it in most cases with 14 AWG and 12 AWG wont effect the ampacity.

Basically if we had 4 NM Cables thru the firestop… 4 current carry conductors so apply For example…how many inspectors make electricians adjust the ampacity in areas where the attics get VERY HOT…again without doing the math would it matter much on smaller NM Cable…probably not. Where more than two NM cables containing two or more current-carrying conductors are bundled together and pass through wood framing that is to be fire- or draftstopped using thermal insulation or sealing foam, the allowable ampacity of each conductor shall be adjusted in accordance with Table Now…I really dont like how this is written…I had one argument a contains only 1 current carry conductor and because how that reads it says…more than 2 NM Cables containing two or more current-carry conductors…but a only has 1 current carry conductor…lol…I know…I know…but thats how debates get going.

Generally the only fire rated assembly in R3 is a ceiling over a garage if there is living space above. It is assumed draft stopping also slows the spread of fire products and thus does slow the spread of fire.