I have decided it is time to finish my detached garage. It has been an unheated shell for a few years now. Currently one light and one electrical plug. I had felt pretty confident in my wiring abilities but before finishing the wiring and covering things up with insulation and drywall I decided to do a little reading here. Now I am concerned, not with the detached garage but with my house panel. I built the house starting in 2006. Electric service was first thing I put in so I could have temporary power to build the house. I have underground into a big green box that feeds a meter and a 200 amp disconnect that are probably 75 feet from the house and attached to a treated lumber stand. The disconnect has bond neutral to ground here with a couple of ground rods. I then run underground with 2 hots and the neutral no bare ground to the house with direct burial alluminum, into 2 inch pvc under attached garage slab to a 200 amp 40 space square d qo panel. This panel has bonded neutral and ground and has been fixed to ground rods outside the house. Reading a few spots here I am now thinking I should have had a 4th bare ground running with my three wire and the panel Unbonded. I can also find examples where this is acceptable and expected on other forums. I am now questioning my house panel setup!!! The feed for the unattached garage is a four wire 100 amp qo 12 space box I installed back in or around 2010. It’s is not bonded with enclosure,aluminum wire run underground in pvc unbonded with machine grounds separated and attached to a ground rod outside of the building. I should also mention I did the work with an electrician friend guiding me and live in rural Iowa. Is the bonding of my house panel correct?
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