Conductor Adjustment Factors

Status
Not open for further replies.

Mike01

Senior Member
Location
MidWest
When using Table 310.15(B)(2)(a) for derating of conductors does the OCPD have to sized based on the derated value of only the current rating of conductor. For example if a #12 is derated 50% (using 90 degree C wire) 30A at 50% leaves me with 15A, my load is significantly less (around 5A) can I still connect this to a 20A OCPD or is the 15A rating also used for selection of the OCPD?
 

PEDRO ESCOVILLA

Senior Member
Location
south texas
protect it based on the derated value of the conductor. 240.4 "protection of conductors" .......shall be protected against overcurrent in accordance with their ampacities specified in 310.15, unless otherwise permitted.....
 
Status
Not open for further replies.
Top