AZ Desert Driver
Rare combination
I just re-read the 300+ instructions/comments on the The home Tesla charging FAQ is located HERE. Great work. Thanks.You can't run THHN in that case, because conduit is considered wet location when outside. THWN rating is minimum for that run.
Is this garage attached or detached? If detached, you can't have multiple feeds going to a detached structure, so if there's any other power in there you will have to consolidate to a subpanel. If attached, you're a-ok.
I think I understand what he was saying... if multiconductor (e.g., a 2-2-2-8) SE/SER cable is used inside thermal insulation, you must use the 60 degree column for ampacity. #2 copper @ 60 degC is only good to 95A. So he's looking to put you at #1 AL so that you can meet 100A requirements. If you were to use all conduit (instead of SER cable), then you could use #2 THWN without a problem.
But I am now cross eyed... My install is to an attached garage.
Seems like the hang up is the simple 120 volt branch circuit . One guy said he could run 6,6,6-10 in a conduit for the 14-50, but he would have to run another pair of wires in that same conduit to supply the 120VAC socket. He would install a new 50 amp breaker in my main panel, and make that breaker a dual 50/20 amp to fit into the slot. No sub panel in my garage - just the 14-50 socket (and the 120 outlet).
Another one said he could run 2,2,2,8 from a new 100 amp breaker to the garage sub panel and use 30 inches of NM from wall penetration at 18" to the panel at 48". He said if I asked for a HPWC, he could not install, but if I stated I only wanted a single 14-50 and 120 outlet, I'm good.
is it true that adding a 120 v outlet from a 2,2,2,8 system causes a problem?