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I need 240V at rental house for EVSE...

5396 Views 18 Replies 14 Participants Last post by  darrin
The house I am renting has a small electrical box without room to add a new ckt for my clipper creek LCS-20P. I was going to make an ultra heavy duty extension cable (10gauge 4 conductor, 600V insulation... more robust than normal wiring in conduit) and a splitter cable from the dryer plug going to both the dryer and the extension cable. I will just never run the dryer while the car is charging.

Now, my problem... the house wiring is set up for a 10-30 (3 wire) dryer plug! Will the clipper creek LCS-20P accept having the ground and neutral on the same pin or will this cause problems? If it will not cause problems, I can go with a 3 wire 10 gauge cable vs the 4 wire cable and save a bit of cost, and have the 3 wire to 4 wire adaptor at the EVSE end of the cable.

If I can't run the LCS-20P on this setup, I can just re-configure to run my stock 2016 EVSE at 240V... but I would prefer to use the LCS-20P and return the stock EVSE to its storage compartment in the car for use as a portable unit rather than leaving it plugged in at home.

Thanks for any information,


PS: Just checked and clipper creek does not "recommend" using a 10-30 to 14-30 adaptor... if I want to do it "right" I can just drive a ground rod into the earth next to my plug and attach the 4th wire to the grounding rod... I just want to know before I start if the simple adaptor cord will work.
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I have charged my Tesla with a 10-50 outlet. I purchased a replacement 10-50 stove cord and a 14-50 outlet (for an RV extension cord) from Amazon for about $30. Connecting neural from the stove cord to the ground on the 14-50 outlet worked perfectly. I did not connect the neutral on the 14-50 outlet since it is not used for EV charging.

Since neutral and ground are connected at the panel, I think the same setup would work for any EV with any EVSE. Just get a 10-30 dryer cord and the appropriate outlet for your EVSE (or hard wire to EVSE). If you try it, please let us know if it works for you.


PS. You could get a "dryer buddy" to convert your 10-30 outlet into two outlets that can be selected with a switch. That would insure no one accidentally turns on the dryer while the car is charging.
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