jerryc41 wrote:
I'm going the have to run about 80' of wire underground - 3-wire 240 volt. If I use RMC, I can bury it just 6" deep. Apparently, I would have to thread the end of the pipe when I cut it. I'm not equipped for that. What's an alternative, or is threading it easy? This is very rocky country, and digging just 6" deep will be a challenge, so I don't want to use PVC and have to dig deeper.
As a retired IBEW Union member and Journeyman wireman, the current NEC code requires that all underground wiring above 120VAC be buried at least 18” below grade. As you stated your soil is rocky, I would recommend digging the trench a bit deeper and putting sand both under and over the cable so that the outer jacket will not be damaged by the rocks. Please take my advice, I did this sh*t for over 40 years.