Homeruns entering panel from trough

[kwired]

I would suggest to electricians that if you see unmarked 'THHN' like wire in a panel just assume its a 60C conductor for dry locations only, the larger conductors 8AWG and up don't even resemble THHN they have a different stranding and are easy to identify.

When it comes to ampacity adjustments, NM-B which is only type of NM that has been made since about 1987ish, is 90C conductor.

Larger conductors are 7 strand instead of 19 strand, though I have seen 7 strand 'THHN' before. Kind of sucks to handle if it is say 4 -1 AWG, and you may not see much of of it. You used to see more 7 strand in those size ranges back when they were still commonly making type THW and maybe the earlier years of when THHN became the norm.

I still see 7 strand copper in irrigation cable for 10 AWG conductors quite often. Still better than solid by a long shot. Not sure if I like it better than 19 strand or not. Strands don't fray as easily, but are more of a pain to straighten out if they do get frayed.

 

[kwired]

Yeah I often order that NO KO option in a panelboard, more oftne than not, and if they had it for residential I would often order it also.
Just a hint hint to all the Eaton, SQD and Siemens reps on here LOL

Standard KO's is still a better deal than the quik grip thing that Square D has for an option in Some QO and Homeline load centers. Absolutely no place to enter on the end of those with say a 1" or 1.25" raceway or cable connector other than the center KO that 80% of the time already has the main supply occupying it.

 

[tortuga]

When it comes to ampacity adjustments, NM-B which is only type of NM that has been made since about 1987ish, is 90C conductor.

Yeah agreed Wayne often posts about 110.14(C), so for determining ampacity in terms of terminations its a 60C conductor.

I still see 7 strand copper in irrigation cable for 10 AWG conductors quite often. Still better than solid by a long shot. Not sure if I like it better than 19 strand or not. Strands don't fray as easily, but are more of a pain to straighten out if they do get frayed.

Yeah thats nice stuff.

 

[LarryFine]

Standard KO's is still a better deal than the quik grip thing that Square D has for an option in Some QO and Homeline load centers.

Anything is better than those! I hate those inserts, especially for replacements.

How are you supposed to slide the panel up the cables?!

 

[Birken Vogt]

You don't want to strip them. The conductors are not labeled so they cannot be run by themselves through the conduit. It looks like you are fine with 20 NMs and 2-1/2" conduit anyway. If you really want to, it's easy enough to just add another conduit to make things easier and for the future.

-Hal

I would suggest to electricians that if you see unmarked 'THHN' like wire in a panel or terminataoin point just assume its a 60C conductor for dry locations only.
The larger NM conductors 8AWG and up don't even resemble THHN they have a different stranding and are easy to identify.

when using 334.15(B) and another wiring method to serve as protection from physical damage I don't think there is anything under 334 or the NEC that requires the sheath to stay on for it to be a 'cable' still.
I mean what could the issue be? dielectric breakdown?
I suppose you could have a office in a industrial plant wired with NM.
Then some NM could share a wireway with a 600V circuit.
For anyone really concerned about dielectric NM cable is actually rated 600V and 334.116 states the sheath is for flame retardant and moisture resistance.

I was going to say this. Even if you strip the jacket back to the gutter and it becomes unmarked black and white wires through the pipe and into the panel. You still can know for sure it is type NM if you just open the cover and look where the jacket is still present.

 

[jim dungar]

Anything is better than those! I hate those inserts, especially for replacements.

How are you supposed to slide the panel up the cables?!

The target market for them is new construction. They were never intended for every installation.
Proper tools for the job.

They have been offered for over 30 years, in different formats. My guess is they are bought by contractors who are trying to save 10-15 minutes per loadcenter/residence. Maybe the same people doing backstabbing?