captainwireman
Senior Member
- Location
- USA, mostly.
I was asked about XHHW and since it is in both 75C and 90C, which one should he use?
What I always thought was:
XHHW in a dry location is OK for the 90C column.
XHHW-2 is OK for the 90C column under wet, damp, or dry conditions.
XHHW under wet or damp conditions must use the 75C column.
I never noticed this before and X wire is used a lot with the stuff I deal with. Do you think this could be expressed differently in the language since I could say "XHHW in the 90C column is an error because it is only acceptable under certain circumstances".
What I always thought was:
XHHW in a dry location is OK for the 90C column.
XHHW-2 is OK for the 90C column under wet, damp, or dry conditions.
XHHW under wet or damp conditions must use the 75C column.
I never noticed this before and X wire is used a lot with the stuff I deal with. Do you think this could be expressed differently in the language since I could say "XHHW in the 90C column is an error because it is only acceptable under certain circumstances".