chevyx92
Senior Member
- Location
- VA BCH, VA
Can't you use the 75 degree column for SER as long as its not in insulation which then I know you must use the 60degree column? I don't see the article saying you can though, 2008 NEC.
SER ampacity
- Thread starter chevyx92
- Start date
- Status
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
The 2008 NEC does not allow the use of 75C. Art. 338.10(B)(4) states to go to Art. 334 part II-- that's for NM and we know that is 60C. The 2011 changed to 75C if not in insulation, etc
chevyx92
Senior Member
- Location
- VA BCH, VA
Oh ok in 2011 it changed. Where in the 2011 does it say 75degree is allowed?
- Location
- New Jersey
- Occupation
- Journeyman Electrician
As stupid as this requirement sounds Dennis is correct. For the 2011 it in 338.10(B)(4).
chevyx92
Senior Member
- Location
- VA BCH, VA
I don't see where it says you can use the 75 degree column
- Location
- New Jersey
- Occupation
- Journeyman Electrician
It doesn't, it says that if not within insulation then you do not need to use the 60? C ampacity . Since most terminals are rated for 75? C and the cable is rated for 75? C or 90? C then you can use a higher than 60? C ampacity.
chevyx92
Senior Member
- Location
- VA BCH, VA
Well I don't see that specifically but I guess by it saying "shall comply with the installation requirements of part two of article 334 excluding 334.80" makes it ok?
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
You got it.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Yes, in the 2008 NEC you were required to follow 334.80 (60? C only) for all SE cable interior installations. Now under the 2011, if not installed in insulation the 60? C limit is not applicable.
- Status