Conductor size for 100 amp sub panel?
- Thread starter vliposky
- Start date
- Status
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
It depends -- read art. 310.15 (B)(6). Let us know hwat you think.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Celtic????
Where did you get that..... What are you up to now????
Where did you get that..... What are you up to now????
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
read the article I stated services and feeders.
- Location
- Massachusetts
If its a sub panel it is likely 310.15 (B)(6) does not apply.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
The Op is obviously talking about copper. 100 amps.. table 310.16 60C.. Look at #1
Plus you never have to go higher than the service conductors.
Plus you never have to go higher than the service conductors.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
iwire said:
We don't know that plus it is a 100 amp service feeding a 100 amp sub. It may apply.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Dennis Alwon said:
I thought that he mentioned NM cable.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
If the service can be #4 then the sub does not have to be larger
mdshunk
Senior Member
- Location
- Right here.
Do they even make/normally stock 4-gauge NM? I thought you're generally into SER when you get that big?
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
mdshunk said:
Yes and also #2 NM 4 wire
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
infinity said:
If it is a dwelling with a 100 amp service than #4 is okay--- agreed
A sub panel for 100 amp does not have to be larger than the service conductors. It would make no sense
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Dennis Alwon said:
You're making a few assumptions. How do you know that the service entrance conductors are #4?
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
infinity said:
You are correct I am assuming that the service was wired as per Table 310.15(B)(6)
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Care to save me the trouble of looking up that statement?Dennis Alwon said:
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
charlie b said:
Care to save me the trouble of looking up that statement?
Art 310.15(B)(6) next to last sentence
- Status