Open Neutral
Senior Member
- Location
- Inside the Beltway
- Occupation
- Engineer
I'm getting told two stories: If there's HDPE duct, and it is buried, not run inside the residence, not in the sun, buried; then it need [not] be UL rated. This is in California.
I ask because I'm pricing things out and there's a $$ difference between the two ducts. The vendors all seem to think it's unnecessary; but then ultimately it is what the AHJ says, true???
I ask because I'm pricing things out and there's a $$ difference between the two ducts. The vendors all seem to think it's unnecessary; but then ultimately it is what the AHJ says, true???