Charging plug temp. concern

[99ls1tj]

I'm using a Grizzl-E plugged into a NEMA-60R outlet. I recently noticed the temperature of the plug gets really warm. It's uncomfortable to the touch and checked with a non contact infrared therm. I get temps around 150 at the hottest spot of the plug which is usually the left side of the plug close to the junction of the plug and receptacle. The outlet is rated at 167*. I had an electrician come out and check the outlet and replace the receptacle with a new one. He said everything was fine. I've emailed Grizzl-E, but I'm still awaiting a response.
Has anyone else noticed this? I'm having trouble finding any information if this is normal or not.

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[Yellow Cake Kid]

Which plug are you referring too? The Nema 220-240 vAC plug or the DC plug that hooks to the vehicle?

If it is the AC plug, the first thing to confirm is that the wiring between the mains supply panel and the NEMA outlet is capable of delivering the required watts.

So, you would want to confirm both the AWG of the wire as well as the length of wire running back to the main supply panel that connects your house to the grid.

For example; for a solid 40 amp supply that does not drag down the voltage and cause heat build up you might be able to get away with 8 AWG wires if the wiring is extremely short (10-15 feet) or maybe 6 AWG if the wires are not too long (20-30 feet).

If you are referring to the DC output cabling and the actual mains supply is adequate, then all you can do is rely on the engineering that the vendor supplied and hope it is a quality product. Converting AC to DC used to be relatively inefficient and resulted in heat. Modern switching systems can be exceptionally efficient and run remarkably cool, but they are relatively expensive per watt of output, so every vendor is having to make hard choices when specifying the electronics.

Ask you electrician what sort of supply wiring is behind your Nema outlet, and make sure it is capable of delivering the requested amps without excess heat loss.

Good luck.

 

[99ls1tj]

I’m referring to the Nema 6-50 plug. The wiring is 8 gauge and about 15 ft. 40 amp breaker. EVSE set at 32 amps.

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