neutrals
- Thread starter lmchenry
- Start date
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crossman
Senior Member
- Location
- Southeast Texas
Are you speaking of 2008 NEC 210.19(A)(1)Excp.2 and 215.2(A)(1)Excp.2?
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I bet he is referencing the old concept on services. It use to be you could drop one size on the neutral SEC. I believe that was a rule of thumb but it is not accurate at all.crossman said:
crossman
Senior Member
- Location
- Southeast Texas
Was a rule of thumb for those who couldn't do the Art 220 calcs?
- Location
- Massachusetts
lmchenry said:
A lot of the SE cable stocked in this area will have a two size smaller neutral/ground.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
The use of line-to-line loads?lmchenry said:
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
To be honest, very few of us resi guys do calculation. I bet I have done less than 10 in the 28 years or so that I have been in business. When a house "feels" close we up it because people always seem to add on. I still generally drop the grounded conductor one size even tho I know I can go smaller.crossman said:
Edited to change ungrounded conductor to grounded.
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- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
roger said:
That may be true but I remember that rule being passed down 30 years ago. I never read it but I always followed that rule for some reason. I know how to do the calcs and I know I can go much lower than that. I guess I always thought it was a good compromise.
Somehow it feels wrong pulling a #2 copper grounded conductor with 2/0 copper
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