EV rated circuit breakers

[blayton1212]

I understand that 50a Home Depot receptacles are failing, due to overheating. Especially when when the dryer, electric oven and hot hot water tank is calling.
Is there a standard that being discussed about EV home charging?

 

[hillbilly1]

I understand that 50a Home Depot receptacles are failing, due to overheating. Especially when when the dryer, electric oven and hot hot water tank is calling.
Is there a standard that being discussed about EV home charging?

Don’t know why the receptacle would fail when other loads that are not connected to it are one.

 

[LarryFine]

Those loads would decrease in current with voltage drop. We need more info.

 

[blayton1212]

Those loads would decrease in current with voltage drop. We need more info.

That’s my point, there is some talk about, duty cycle? EVs are continuous. Sandy Monro on U tube has a video home EV installations that where he is raising the alarm bells with Duty Cycle etc.

 

[VirutalElectrician]

For an EV charging outlet, I believe Tesla recommends (requires?) the Hubbell 9450A.

 

[Jraef]

What does this have to do with circuit breakers?

 

[retirede]

The problems are with receptacles, not circuit breakers.

 

[Little Bill]

I understand that 50a Home Depot receptacles are failing, due to overheating. Especially when when the dryer, electric oven and hot hot water tank is calling.
Is there a standard that being discussed about EV home charging?

@blayton1212
Please update your profile to include your occupation?

 

[blayton1212]

What does this have to do with circuit breakers

Is seems some EV,s can potentially charge at a rate up to 60 amps, most charge at 50A for over 4 hours. Code says 80% of FLC.

 

[retirede]

Is seems some EV,s can potentially charge at a rate up to 60 amps, most charge at 50A for over 4 hours. Code says 80% of FLC.

There are a couple of exceptions, but almost all EVSEs are rated 48A or less. A 48A EVSE requires a 60A branch circuit.

 

[David Castor]

I understand that 50a Home Depot receptacles are failing

What's your source for this? News to me. Also, I've never seen a Home Depot receptacle. They generally sell name brands from what I've seen.

 

[retirede]

What's your source for this? News to me. Also, I've never seen a Home Depot receptacle. They generally sell name brands from what I've seen.

Google “Melted 14-50R”. You’ll get dozens of results from various EV owners forums. The most common culprit is the $9 Leviton receptacle commonly sold in big box stores.

 

[letgomywago]

Google “Melted 14-50R”. You’ll get dozens of results from various EV owners forums. The most common culprit is the $9 Leviton receptacle commonly sold in big box stores.

My P n S 50 amps are 6 bucks so is leviton that much worse?

 

[macmikeman]

If they can beef up breakers just for EV and PV systemsI'm all for it. I have on my iPod lot of pictures of burnt up circuit breakers that were feeding one or the other of the two I mention. Contractors put in #2 cu conductors to Tesla wall chargers and the 100amp breakers feeding melted. Checked connections and all were spec or tighter. And now Tesla doesn't sell 100 amp chargers any longer so I'm feeling fairly certain it must have been more than just the ones I have looked at. Not as often I have seen similar cases with grid tied PV installs but on those , I am not convinced that the connections at the branch circuit breaker were properly torqued. I found very loose connections at breaker terminal lugs on more than one case I have investigated .

 

[don_resqcapt19]

If they can beef up breakers just for EV and PV systemsI'm all for it. I have on my iPod lot of pictures of burnt up circuit breakers that were feeding one or the other of the two I mention. Contractors put in #2 cu conductors to Tesla wall chargers and the 100amp breakers feeding melted. Checked connections and all were spec or tighter. And now Tesla doesn't sell 100 amp chargers any longer so I'm feeling fairly certain it must have been more than just the ones I have looked at. Not as often I have seen similar cases with grid tied PV installs but on those , I am not convinced that the connections at the branch circuit breaker were properly torqued. I found very loose connections at breaker terminal lugs on more than one case I have investigated .

Listed breakers must carry their full load forever in open air at 40°C without damage to the breaker or the conductors. Would expect to see some issue other than the breaker.

 

[farmantenna]

For an EV charging outlet, I believe Tesla recommends (requires?) the Hubbell 9450A

because it costs $90!

 

[retirede]

My P n S 50 amps are 6 bucks so is leviton that much worse?

I have no first-hand experience, but probably equivalent.

The Hubbel and Bryant heavy duty ones can run up to $100 depending on where you buy them.

 

[kwired]

I have no first-hand experience, but probably equivalent.

The Hubbel and Bryant heavy duty ones can run up to $100 depending on where you buy them.

$213 on Grainger site.

What is so special about them to make them so much higher than others with same configuration?

 

[hillbilly1]

$212 at Zoro, and out of stock and extended lead time. I wonder what’s going on with Zoro, they are out of stock on a lot of things.

 

[retirede]

$213 on Grainger site.

What is so special about them to make them so much higher than others with same configuration?

The EV community has created a huge demand for these, thus the price hikes. They were $98 at Grainger last October.

Here is a comparison:

They also differ on the wire side. The Leviton has screwdriver clamp screws that twist directly on the wire, while the Hubbell has Allen screws with saddles.