PaulEd
Member
- Location
- United States
Having a brain (blank) here guys
According to the national electrical if I need to derate conductors and for example, I have XHHW which is rated from 90°C, but I install it on a roof where XHHW is only rated at 75°C. (Outdoors) can I still derate from the 90° column or do I need to debate from the 75° column?
According to the national electrical if I need to derate conductors and for example, I have XHHW which is rated from 90°C, but I install it on a roof where XHHW is only rated at 75°C. (Outdoors) can I still derate from the 90° column or do I need to debate from the 75° column?