SEU or MC for 48 amp EV charge #6/2

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I prefer to use appropriately-sized aluminum SEU or SER cable; cheaper than copper.

Yes, you can run cable to a box and transition to a conduit the rest of the way.
 
shlansky said:
winnie, not sure if you are replying to me but my EVSE is hardwired so I need two conductors and a ground. The SEU is number 6 x 2 with a surrounding #8 that would be used as a ground. This is the same a MC 6/2 but obviously in a PVC sheath as apposed to the MC but you all know that. Just seeing if per code, would there be any violations running the SEU above a wood drop ceiling to a box and then through the wall in conduit with THHN #6 directly to the EVSE that is on the opposite side of the wall. Could run the SEU directly into it but would look nicer in conduit. Thanks.
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I'm going to half apologize for all of us. It is the nature of this forum that we go off on tangents. You asked a question about a hard wire installation, I replied to someone else about receptacles.

Jon
 
Thanks all. One other question, decided to go with MC 6/2 since my supply house has it and no 6-6-8 SEU. I am going to branch off the 6/2 to supply two chargers that power share. My plan is to use a pull box and a 3 port Polaris/Morris connector to tie the three #6s together. The ground is # 8, one will need to go to the pull box and then the three grounds so need 4 connections. Seems like a waste of money for a 4 hole Polaris at 28 dollars. Can I just use a small ground bar to tie then all together or ever screw a ground bar into the pull box. Planning on a 6 x 6 x 4 unless this is way too big but need room for the Polaris connectors. Thanks.
 
shlansky said:
Thanks all. One other question, decided to go with MC 6/2 since my supply house has it and no 6-6-8 SEU. I am going to branch off the 6/2 to supply two chargers that power share. My plan is to use a pull box and a 3 port Polaris/Morris connector to tie the three #6s together. The ground is # 8, one will need to go to the pull box and then the three grounds so need 4 connections. Seems like a waste of money for a 4 hole Polaris at 28 dollars. Can I just use a small ground bar to tie then all together or ever screw a ground bar into the pull box. Planning on a 6 x 6 x 4 unless this is way too big but need room for the Polaris connectors. Thanks.
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Just an FYI….load sharing can only be used by EVSEs to share feeder / service capacity. A branch circuit serving an EVSE can have no additional outlets.

A small subpanel might cost less than all those Polaris connectors anyway.

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The 23 code has a change to allow load sharing on a single branch circuit.
 
I was trying to read section 625 and I can't find anything about disallowing load sharing with a single branch circuit. The Morris connects are only 14 x 2 equals 28 bucks. Running an addition branch and subpanel with be much more costly and painful.
 
There are EV chargers that will charge two vehicles and have one supply circuit.
 
shlansky said:
Thanks all. One other question, decided to go with MC 6/2 since my supply house has it and no 6-6-8 SEU. I am going to branch off the 6/2 to supply two chargers that power share. My plan is to use a pull box and a 3 port Polaris/Morris connector to tie the three #6s together. The ground is # 8, one will need to go to the pull box and then the three grounds so need 4 connections. Seems like a waste of money for a 4 hole Polaris at 28 dollars. Can I just use a small ground bar to tie then all together or ever screw a ground bar into the pull box. Planning on a 6 x 6 x 4 unless this is way too big but need room for the Polaris connectors. Thanks
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Yes there are but the with two chargers such a wallbox, you run a low voltage pair of wires between chargers and they negotiate to share the 48 amps. If one car charges to completion, the other charger get the full 48 amp. Power sharing with both boxes on the same branch service but in optimal position in the garage. A single charger with two car plugs may not be optimal for both cars. Actually with Wallbox you can up to several charges.
 
shlansky said:
Yes there are but the with two chargers such a wallbox, you run a low voltage pair of wires between chargers and they negotiate to share the 48 amps. If one car charges to completion, the other charger get the full 48 amp. Power sharing with both boxes on the same branch service but in optimal position in the garage. A single charger with two car plugs may not be optimal for both cars. Actually with Wallbox you can up to several charges.
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Thanks for the info. I did not know about that type of charger setup.
 
shlansky said:
I was trying to read section 625 and I can't find anything about disallowing load sharing with a single branch circuit. The Morris connects are only 14 x 2 equals 28 bucks. Running an addition branch and subpanel with be much more costly and painful.
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I quoted the exact section.

A Homeline 100A panel is $27 here. Add $17 each for 60A breakers.
 
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There are several EV chargers offering this including Tesla, Wallbox and Chargepoint. I doubt it would be widespread if a NEC violation, not that it impossible but seems silly for a company to advertise and give specific instructions to the effect if it were to violate NEC code and make the owner liable for such violation and downside risk. I believe there was an exception for those with power management systems.
 
shlansky said:
There are several EV chargers offering this including Tesla, Wallbox and Chargepoint. I doubt it would be widespread if a NEC violation, not that it impossible but seems silly for a company to advertise and give specific instructions to the effect if it were to violate NEC code and make the owner liable for such violation and downside risk. I believe there was an exception for those with power management systems.
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The exception is being introduced in the 2023 NEC.
The code is playing catch-up in the EV world. Load sharing on a single branch circuit is perfectly safe, but apparently wasn’t envisioned when the “no other outlet” rule was written. If you read the fine print on most load-sharing EVSEs, it mentions sharing a feeder, not a branch circuit.

Here is what Enelex is saying. They quote directly from the NEC.
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