ChuckA

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Just a quick update: The electrician came out and when he pulled the metal box that housed the Leviton outlet, he discovered that the electrician that installed it originally had over tightened the plastic clamp the holds the wire bundle (prevents motion) and the edge of the clamp over the years actually cut into the wire.

My original plan was to just reuse the charger and replace the outlet or cut the pigtail open and have him hardwire. He stated that his company would not do either due to liability risks. So, that left me with a choice, I could rewire myself (the pig tail only) and have the electrician install the new outlet or I could buy a new charger and have them hardwire since the wires are exposed. When I stumbed across the $250 discount (see my post above) on the Charge Point Charger (that is on Tom Mologhoney's top 10 list of 2024) I decided with safety in mind to go new charger and hardwire. Delivery is 2-7 days so I sit and wait for now.
Take a look at the Emporia Level 2 being sod at AliExpress for ~$300. It comes in either 14-50 or hardwire configuration. Shipped out of CA to CT, 2 weeks. See if utility offers rebates.
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Lb8403

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All,
I would also recommend installing a security system with peripheral sensors that you can purchase to enhance its capabilities (e.g., SimpliSafe). Additionally, consider installing a fire alarm sensor above the receptacle to monitor your house when you are away or asleep. ??‍????
 

4wheeldog

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Well, since I have owned the MME for 9 days, and I installed the charger myself (Plugged it into the circuit the electrician installed when the shop was built 20 years ago) I got out my trusty laser thermometer. With the car charging for an hour the plug is at 60 degrees while the surrounding area is 45 degrees. The charger box itself is a couple degrees warmer than the plug. So I think I am OK for the moment.
I did open the outlet to confirm that it is a heavy duty outlet when I hung the charger. And it is all on a 60 amp breaker. Charger is set at 32 amps. Other than being a plug in, it is a very conservative setup.
 

Maquis

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Well, since I have owned the MME for 9 days, and I installed the charger myself (Plugged it into the circuit the electrician installed when the shop was built 20 years ago) I got out my trusty laser thermometer. With the car charging for an hour the plug is at 60 degrees while the surrounding area is 45 degrees. The charger box itself is a couple degrees warmer than the plug. So I think I am OK for the moment.
I did open the outlet to confirm that it is a heavy duty outlet when I hung the charger. And it is all on a 60 amp breaker. Charger is set at 32 amps. Other than being a plug in, it is a very conservative setup.
It’s not conservative having a 50 amp receptacle on a 60 amp breaker, it’s a code violation.
 


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I had a licensed electrician install my outlet back in 2020. Started charging with my JuiceBox 40 in February 2021 pulling 40 amps. One day while charging I smelled burning plastic. I'm a retired Mechanical/Electrical Engineer. I pulled the melted outlet. It was a cheap Leviton and not properly torqued. The plug on the JuiceBox was charred but still functioned. I replaced it myself with a Hubbell and torqued it to 75 in/lb. Trouble free for the last 3 years.
I would just like to add that it is imperative to properly torque the connections. This involves repeated steps of bending/moving the wires so that they separate and re-torque to spec. Even an "industrial" plug can overheat if the connections are not tightened and torqued properly.
 
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HuntingPudel

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Really? It is recommended

and you can’t draw 50 amps continuously from a 50 amp breaker.
It is indeed against the National Electrical Code to protect the outlet and circuit with a breaker that has a larger capacity than the weakest component. You can protect the circuit with a breaker that is rated lower than the other components of the circuit, but putting a larger breaker into the circuit is asking to catch something downstream on fire. ??

You also cannot safely put 50A continuously through a 50A outlet. With 125% load overhead, you can put a continuous load of 40A on a 50A outlet. ??

Having your EVSE set to 32A is all well and good. If an inspector looks at your breaker and the outlet, he or she will let you know that the circuit is not in compliance. ??
 

HuntingPudel

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I would just like to add that it is imperative to properly torque the connections. This involves repeated steps of bending/moving the wires so that they separate and re-torque to spec. Even a "commercial" plug can overheat if the connections are not tightened and torqued properly.
The commercial outlets are the junky ones. The industrial outlets have the better construction. Agreed that proper torquing of the clamps is necessary. ??
 

4wheeldog

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My
It is indeed against the National Electrical Code to protect the outlet and circuit with a breaker that has a larger capacity than the weakest component. You can protect the circuit with a breaker that is rated lower than the other components of the circuit, but putting a larger breaker into the circuit is asking to catch something downstream on fire. ??

You also cannot safely put 50A continuously through a 50A outlet. With 125% load overhead, you can put a continuous load of 40A on a 50A outlet. ??

Having your EVSE set to 32A is all well and good. If an inspector looks at your breaker and the outlet, he or she will let you know that the circuit is not in compliance. ??
assumption is that the electrician was aware of the outlet’s limitations when he installed it. My reading indicates you cannot charge at full rated breaker capacity. Maybe the outlet is actually a 14/60?
 

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The commercial outlets are the junky ones. The industrial outlets have the better construction. Agreed that proper torquing of the clamps is necessary. ??
I meant industrial, I updated my post.
 

HuntingPudel

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My

assumption is that the electrician was aware of the outlet’s limitations when he installed it. My reading indicates you cannot charge at full rated breaker capacity. Maybe the outlet is actually a 14/60?
You cannot plug a 14-50 plug directly into a 14-60 receptacle because the neutral blade on a 14-50 is parallel to the two hot blades, where on a 14-60 it is perpendicularly arranged. See below: ??

Ford Mustang Mach-E Melted 240V outlet (Major Disaster Avoided) -- PSA: only highly rated charging equipment IMG_4983
 

Maquis

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Really? It is recommended

and you can’t draw 50 amps continuously from a 50 amp breaker.
Actually you can. Breakers are designed to carry their rated current. But for EVSE applications, the NEC limits a 14-50 receptacle to 40 amps on a 50 amp breaker. But it’s not my house, so I’d say you’re golden.
 
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67 Stang Convertible

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Wow, I trickle charged last night (1st time ever) using Ford’s mobile charger. Way too slow for this hombre!!! Not so patiently awaiting my Charge Point!!!
Ford Mustang Mach-E Melted 240V outlet (Major Disaster Avoided) -- PSA: only highly rated charging equipment IMG_1464
Ford Mustang Mach-E Melted 240V outlet (Major Disaster Avoided) -- PSA: only highly rated charging equipment IMG_1462
 

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I had the Ford charger installed by an electrician. It is hardwired. No problems since 2021.
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