Defective (hazardous) portable EVSE

bwilson4web

bwilson4web

Well-Known Member
Subscriber
With a home made NEMA 14-50 to NEMA 5-15 adapter, I was able to test the unit at 120 VAC and it is a disaster:
237328_upload_2023-5-24_22-36-59.png

Tested with my Tesla Model 3, I could control the amps only to find the EVSE is unsafe to unsophisticated EV owners (aka., ex-wife.):
  • Initially tried to draw 31 A, the Tesla default
  • Stepped Tesla amps to generate the above chart
  • Typically 80% of the circuit breaker is the maxiumum safe load
    • 12 A - NEMA 5-15
    • 15 A - NEMA 5-20
    • Lower currents are OK and sometimes needed if other loads on the circuit
I've already submitted a 'return' request and will be shipping it back. But I am quite disappointed by this unsafe performance.

Bob Wilson
 
bwilson4web said:
15 A - NEMA 5-20
Click to expand...
Minor correction... 16A on a 20A circuit, but regardless, the adjustable EVSE should never draw above the selected current.
Good thing you tested the unit, also curious if the manufacture has applied accredited safety standards label.
 
BTW, just bought a used:
"WORKERSBEE Level 2 EV Charger, 110V-240V 32Amp, NEMA 14-50 Plug" This one has a manual, current set switch. After I test it, I'll gift it to my ex-wife for her BMW i3-REx.

Bob Wilson
 
Last edited:
s-l400.webp

The unit is not defective. It has a 50A cord and plug on it. Defective would be if it tried drawing over 40A from a 14-50.

An adaptor made with a 14-50 socket and a 5-15 plug is not legal, safe nor sensible.

No EVSE knows what the wiring is the other side of its power plug. It should be plugged into a suitable circuit, or bad things can happen. Would you put a 5-15 on a stove?

The correct way to hook this up to 110 would be by removing the 14-50 and fitting a 5-50. Then you could plug it in to a suitable 40/50A circuit.
 
Last edited:
You must log in or register to reply here.
Back
Top