Good luck with Tesla, do let us know the resolution in the end. Your situation raised some questions that were of interest to me, so you got the benefit of my learning (e.g. how to size feeders for multiple motors/HVAC units). Hopefully I was still able to give you correct answers.
@wwhitney , No luck getting through to Tesla
. Meanwhile, I went to a friend's place in the neighborhood and checked out his PowerWall and Solar installation. He has a much bigger house than me, which is about 4300 Sq. Ft. I've attached pictures from his installation.
His electrical system also has a split panel, here are some of the details of his system which look very similar to what needs to be done to mine:
- two 200A Circuit breakers in the main panel (I've a 200A and 150A disconnect)
- the distribution section of the main panel has several heavy loads such as AC, SPA, Oven etc.
- Tesla installed a backup load center with a 200A disconnect
- Tesla relocated most of the loads from the main panel to the Tesla installed backup load center panel (200A). This includes one of the ACs !
- Tesla rewired one of the 200 A disconnect from the main panel, that was previously going to a sub-panel in the garage, to the Tesla Gateway.
- Tesla wired the sub-panel in the garage to a 100A breaker in the backup load center
This is a reaffirmation of the design changes you have proposed for my powerwall installation.
I don't why Tesla did not do this in the first place and why they are not willing to make a change now!
Just slightly confused by the phrase "lug nut", from the picture the only connection I see that you undid was the feeder neutral to that subpanel, which uses a slotted set screw in the neutral lug. Were there others?
Sorry for using the wrong terminology. There are 3 screws in all. I opened each of them to look at the cable to see if i can see any markings.
Anyway, FYI, when tightening a slotted set screw like that, it's important to use a slotted driver that fills or very close to fills the slot. If you use one that's too small, it often can't transfer the required torque and you end up damaging the slot in the set screw instead of tightening it.
I've a torque wrench that I use on my cars, but, don't have a torque screw driver.
Any recommendations for an appropriate torque screwdriver to be used with electrical wiring?
thanks