Ugh. Workshop had 220v in a NEMA 5-20R. Lemons to lemonade?

CZroe

Lifer
Jun 24, 2001
24,195
856
126
Setting up in a workshop after getting displaced from a tornado. Considering the placement by a window they boarded up AFTER I signed the lease, I figured this NEMA 5-20 was for higher-amp air conditioners:


NOPE! Found out the hard way that this has 220v. Luckily I only fried a work light and not my air conditioner I just installed. Yeah, this place needs lights too. No, it wasn’t hanging out like that but it was missing the wall plate and covered in webs.

The same tornado displaced my brother and and crushed my car and now we can only charge his Chevy Volt at public charge points. Sharing a car means more reason than ever to keep it charged... and then gas prices doubled from the pipeline hack... and his car takes Premium when on gas.


My brother still has his Level 2 EVSE for charging his Volt, just no place to plug it in (temporary house has no garage or driveway). There’s obviously good reason to charge at the workshop if we can get the thing plugged in, but I need a NEMA 14-30R.


My brother and an electrician friend installed the last one. That friend moved out of state and the breaker box at the workshop looks like something from World War II. I don’t think I’ll be running new wires and installing a new 220v breaker. Here is what the old install looks like:



Yes, you can see daylight streaming into the walls. Darned tornado. I decided not to pull it out of the wall just yet. Need a plan of action.

OK, so the Volt only charges up to 15A even though the EVSE is capable of more. As long as no one plugs their higher amperage vehicles into the EVSE then it should be fine to adapt it to a 20A outlet. It seems that the 220v version of a NEMA 5-20R is a 6-20R so I will swap the outlet out for that and then try to make a pigtail adapter with a 6-20P to 14-30R. I’ll then 3D print an EVSE wall mount and rig up some way to lock out unauthorized users. Don’t need some random plugging their Nissan Leaf into it even if they don’t start a fire (electricity isn’t free).

This is what was suggested to me. The alternative is to grab our 14-30R from the tornado-damaged home and run new wiring to a breaker box that looks like a death trap and is even more out of my depth.

...and before anyone says it: If I could afford an electrician right now then I’d be looking at a car instead of pricing out electric scooters. I’m literally lining up at food banks right now. Darned tornado
 

herm0016

Diamond Member
Feb 26, 2005
8,421
1,049
126
replace plug, make pigtail. should be fine. just hang the charger and take it with you when you leave to keep others from using it.

sorry about the Nado. that sucks.

we have a gen 1 volt and its been a great car.
 
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CZroe

Lifer
Jun 24, 2001
24,195
856
126
replace plug, make pigtail. should be fine. just hang the charger and take it with you when you leave to keep others from using it.

sorry about the Nado. that sucks.

we have a gen 1 volt and its been a great car.
Thanks. The plan is to seal up whatever hole I make for the cable to keep outdoor pests out so we probably couldn’t just come and go with it. J1772 EVSE handle mount designs are all over thingiverse so I only need to add a lock of some kind with something to keep it out of the rain. Annoyingly, the owners boarded up that window and filled a hole in the wall right after we signed the lease even though I had plans for both. I was already planning to put an AC there and either an EVSE or a drain for a utility sink. Guess I’ll be undoing a lot of their work.
 

CZroe

Lifer
Jun 24, 2001
24,195
856
126


It seems to be working! Of course, I can’t actually plug it into the car until I can make a hole through cinder block. When I signed the lease there was a hole that I planned to use but they filled it in.



It wasn’t ideal for an EVSE anyway since that side is in the woods and the pavement is several feet away at the front of the building, which means I would’ve had to mount it outside with some weather protection of some kind... under a drippy air conditioner. Even so, I intended to use that hole for a utility sink drain if nothing else (would only dump water).

Guess I’ll be routing along the wall and out the front of the building, but I’ll have to look up ways to make a clean hole in cinder blocks and find a way to block critters/weather while letting the cable through (it obviously has to be much bigger than the cable to get either end through). Guessing a regular hole saw won’t cut it. Any tips?
 

CZroe

Lifer
Jun 24, 2001
24,195
856
126
Yeah, I actually watched that exact video before posting. Looked like everyone is using hammer drills, which I don’t have. I do have an emergency roadside 12v impact wrench but it is just meant for loosening tire lug nuts. Hoping for something that works with a regular drill but I saw at least a few videos using a “Hilton” hammer drill and some struggling with even that so I might be out of luck.

Thanks though.
 

jmagg

Platinum Member
Nov 21, 2001
2,062
386
126
Looks like you can simply hit the patch with a hammer from both sides, then trim up with a chisel.
 
Last edited:
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Torn Mind

Lifer
Nov 25, 2012
11,782
2,685
136
Cinder blocks are rather fragile things and mostly hollow. A baby sledge can demolish them in minutes. So if you feel like chiseling something out...it won't be as terrible as trying to break old concrete.

You can even drill smaller holes in them with a regular drill and masonry bits, although the bits might not last as long.

You main concern is not making the landlord angry.
 
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