K kenaslan Senior Member Location Billings MT Jun 13, 2012 #1 ETAP is using ICEA P-54-440 in the cable tray derating module. Is this more strigent and better/safer than the NEC calcuations? It seems to me that there are more derating varibales in IECA than the NEC.
ETAP is using ICEA P-54-440 in the cable tray derating module. Is this more strigent and better/safer than the NEC calcuations? It seems to me that there are more derating varibales in IECA than the NEC.