astonius
Well-Known Member
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- #1
I need some guidance on my home setup. We have 200A service, over half of which is dedicated to HVAC. The garage has a sub-panel we are looking to tap into to charge two EVs (an R1T and a Model X). An electrician came out and said he could add two circuits, one 60A and one 50A, both wired with #6, and give us two NEMA 14-50s that could be converted to work with wall connectors if we wanted. This sounded great, but then I remembered the sub-panel feeds into a 90A breaker in the main panel, so if both cars tried to pull at peak we'd be exceeding the load limit on the sub-panel. I asked him about this, and he said yes, we could potentially cause issues if we're using the oven, the dryer, and charging both cars at the same time.
I then proposed just going to a single 60A circuit and setting up a load-sharing system but with two 14-50 receptacles (for flexibility) on the same circuit. He said that it is not legal to put multiple 14-50 receptacles on the same circuit. Am I missing something, or is this just a NEMA limitation? If instead of doing NEMA 14-50s we just wired directly into two load-sharing EVSE connectors would that be allowed on the same 60A circuit without a sub-panel? I fully admit I'm a complete newbie when it comes to this stuff, just want to get the best possible charging setup for 2 EVs that I can at the most efficient price and without overloading my system or breaking code.
I then proposed just going to a single 60A circuit and setting up a load-sharing system but with two 14-50 receptacles (for flexibility) on the same circuit. He said that it is not legal to put multiple 14-50 receptacles on the same circuit. Am I missing something, or is this just a NEMA limitation? If instead of doing NEMA 14-50s we just wired directly into two load-sharing EVSE connectors would that be allowed on the same 60A circuit without a sub-panel? I fully admit I'm a complete newbie when it comes to this stuff, just want to get the best possible charging setup for 2 EVs that I can at the most efficient price and without overloading my system or breaking code.
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