No ground connecting disconnect from subpanel
Good Evening. Interesting electrical dilemma. Got a shouse that I am building and it lies between the meter (at the pole) and the site of my future home. The distances are:
1. Disconnect to subpanel in shouse is 240′
2. Shouse subpanel to future house subpanel is 115′
I have buried the 4/0 (two 4/0 and one 2/0) aluminum in pvc conduit to the inside of the crawlspace.
It is now that I have learned that there should be a ground wire connecting the unbonded shouse subpanel to the bonded main disconnect. The disconnect has a 200 amp breaker and a 20 amp hot weathertight GFCI outlet.
After some back and forth with the electrical co-op they arranged a visit from their staking engineer. I asked him if I wasn’t supposed to run 4 wires and he said that sometimes modular homes require that.
SO. Two questions:
1. What is the best way to proceed with the wiring of the shouse subpanel?
2. Considering the work that I have completed, what is the best way to connect 200amp service to a shouse requiring 150 amps max. and also to a future house that will require 150 amps min.?
Just seeing who’s up late on a Sunday night.