[RE-wrenches] Cable Sizing

Peter Parrish peter.parrish at calsolareng.com
Thu Jan 8 13:20:08 PST 2009


Boy did I light one off. Can I steer an enlightened soul back to my specific
question:

"In specific: if we have two DC PV circuits (4 wires: 2 positive, 2
negative) in EMT and we have taken into account the "PV 125% circuit current
calculation", "cable sizing of 125% for proper operation of overcurrent
devices", and cable derating for temperature -- do we now apply the derating
from B.310.11 for 4-6 wires?"

Peter T. Parrish, President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parrish at calsolareng.com 





More information about the RE-wrenches mailing list