AZsparky
Senior Member
- Location
- Scottsdale, AZ
What year (approximately) was PVC for electrical underground first introduced and commonly used? Was it only schedule 40 at first, or was schedule 80 available also? TIA
PVC for underground
- Thread starter AZsparky
- Start date
letgomywago
Senior Member
- Location
- Washington state and Oregon coast
- Occupation
- residential electrician
Post ww2 idk when schedules were introduced.