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I feel your pain, years ago when going through something similar with a new house build a buddy of mine that owned low voltage cable company ran some network cable for me prior to sheetrock/close. Builder's electrician found out and said he wouldnt warranty the electrical work with other cable in the house. Even though my guy drilled his own holes etc. Electrician wanted to be paid 10x to do similar work. Was frustrating.The home isn't fully custom, the builder explicitly bans me from being on the property without a representative from the builder there (they claim due to liability, I can see where that makes sense). I won't actually own the home until I close on it in March.
I took the advice of you (or someone else) that posted that before and went and got pictures of all the walls. I think I may try to go back today or tomorrow as well because reviewing the pictures there actually looks like one closet area that doesn’t have a low voltage network cable run… or I just can’t see it in the picture. So already might be coming in handy.Looks like you'll have a sweet setup. Good thing you've got pictures of the install. With all those cables stapled to the stud on the left, you'll want to be careful. I would heartily recommend that you take the time to take pictures of ALL of the open walls. It can come in handy for so many things down the road. Not only wiring changes, but answer questions about plumbing runs, whether you can cut a door or window into a location or whether a wall is load bearing.
Looks like the builder has no clue. The prewiring for an EV should be high on his list of things to offer to clients. My suggestion would be to hire a electrician who specializes in EV wiring. Tesla has a list of qualified electricians who can do the job and they are licenced. It is easier to wire for EV when the hose is being built than ripping off walls and doing it afterwards.Ugh. This is becoming far more stressful than it should. I was as low profile, professional, and clean looking as possible. I also was trying to avoid ripping into walls that were literally days old. They only had one option an “EV Pre-wire” and their management/sales people were… less than familiar with exactly what that option was.
I’m asking to be included during the walk through with their electrician subcontractor “just in case” there were questions with my additions. But really I want to drill down into these questions and see if they can size the wire correctly. I don’t NEED 100 amp. I don’t care if they don’t cut me a discount or anything, I would be fine with 4 AWG run with an appropriate sized breaker.
100 amp service on a NEW house, Something ain't right. 200 amp service is the standard where I live in South Alabama. And Steer clear of any ALUMINUM WIRE, not acceptable in the house PERIOD. These specs should be in your contract and not left up to chance.What about if they use aluminum wire? Would I then be able to have an electrician use a pigtail to step down to a smaller AWG and copper?
Also, does everyone think there will be enough space behind the wall connector for all this? Ideally I want to slap the wall connector up right over whatever electric box they leave the cable in so it looks as clean as possible...
https://www.smarthomecharge.co.uk/site/assets/files/2207/tesla_charger_installed_1.png <--- That is ideally what I'm going for (though it'll be in a fully enclosed garage).
I'm really hoping I'll be able to show up and chat with their electrician sub before he starts the work and explain to them. I figure this all should be really pretty easy and something they could accommodate, but it's hard when trying to explain to a construction manager that will later try to explain to the subcontractor and doing it all without physically leaving the device with them to just mount up. I really wish they would just let me supply my own device as long as I have it before electrical is scheduled (so I don't hold up schedules) and sign a disclosure saying that they only warranty that the device is wired correctly, not if it is working etc.
Issue actually wasn't resolved... well, kinda.This is an old thread. If you read through the whole thread, you'll see that the issues are resolved, and it's pretty much all good.
Just let your homebuilder's electrician install the 100 amp circuit/feeder. Once that is installed you can either connect it directly to your Tesla Wall Connector (with pigtails as has been previously discussed) or install a small sub panel
I still have a junction box that looks pretty rough... but I'll drywall plaster over it and then paint the garage at some point
Good catch! Yes, drywalling over the junction box is a big problem. A future electrician will be scratching their heads when they can't see where the wire changes size. Also, if one of those connections goes bad, no one can inspect them to figure out the problem. Finally if the drywall is exposed to the interior of the box, it can be a fire hazard.If that box has wires in it, it must be accessible to meet NEC. Put a cover on it instead
Ah yes ... about that solution. If the breaker is sized to the smaller wire then fine. Otherwise, the tap rules come into play. See 240.4 towards the endA future electrician will be scratching their heads when they can't see where the wire changes size.