ebill3
Well-known member
Make that 100 Amps and 240 volts.cdherman said:And indeed, the tesla would need a 120A (not volt!) 220V circuit. That would be at least 2g copper, or larger I think. Crazy.....
Make that 100 Amps and 240 volts.cdherman said:And indeed, the tesla would need a 120A (not volt!) 220V circuit. That would be at least 2g copper, or larger I think. Crazy.....
Mel4EV said:A 100amp home EVSE would be complete overkill. That is what you need on a trip to add 80m range per hour. For your home who cares if it takes 1 hour or 16 hours to re charge? You have to sleep anyway! If the cable will reach the car, then just plug into the dryer outlet. If it doesn't, then you will need an electrician.
schamberlin said:RonDawg said:If you're going to spend that kind of money to get 40 amp service, why not get a 30 amp EVSE? The Bosch PowerMax 30A/18 is about the same price as the Clipper Creek.
My car won't take advantage of the higher charging rate, and the quality and reliability of the Bosch is unknown since it's new. And it's not even available for sale yet.
coolfilmaker said:Mel4EV said:A 100amp home EVSE would be complete overkill. That is what you need on a trip to add 80m range per hour. For your home who cares if it takes 1 hour or 16 hours to re charge? You have to sleep anyway! If the cable will reach the car, then just plug into the dryer outlet. If it doesn't, then you will need an electrician.
I guess you never have family over for the holidays?
Mel4EV said:coolfilmaker said:Mel4EV said:A 100amp home EVSE would be complete overkill. That is what you need on a trip to add 80m range per hour. For your home who cares if it takes 1 hour or 16 hours to re charge? You have to sleep anyway! If the cable will reach the car, then just plug into the dryer outlet. If it doesn't, then you will need an electrician.
I guess you never have family over for the holidays?
My point is that someone is giving advice to a new to EV person to gear up for home fast charging of a Tesla, when he has a Leaf and the smallest L2 charger right now.
Re family over holidays, his Clipper Creek will work over a day time night time rotation.
Let's not get carried away with future proofing. Upgrades can always come later.
coolfilmaker said:And some people don't like wasting their time and money later doing things that could be done now.
MikeD said:EVDRIVER: Do you have an opinion about how you think one ought to be able to cope with, say, a 3 Leaf household when the available electric capacity for charging is limited to, say, no more than 40a 240v? If this isn't the multi-EV hypothetical you would like to comment on, please supply your own, but I am interested in what you see as workable charging solutions for a problem that is likely to become (hopefully) much more common in the near future.
3x evse upgrade set to 10 amps each plugged into a shared 40a circuit.MikeD said:EVDRIVER: Do you have an opinion about how you think one ought to be able to cope with, say, a 3 Leaf household when the available electric capacity for charging is limited to, say, no more than 40a 240v? If this isn't the multi-EV hypothetical you would like to comment on, please supply your own, but I am interested in what you see as workable charging solutions for a problem that is likely to become (hopefully) much more common in the near future.
Ingineer said:For the bulk of all normal residential charging, ~3kW is sufficient, after all, there are well over 10,000 EV's on the road with as a limit! For most all situations an overnight charge meets the needs of EV ownership. As long as the car is ready for you when you leave, there is no problem. Where faster charging is really desired, is in public where you will likely be waiting patiently for each mile of precious range added. (rather than sleeping it away!) This is where >6kW makes sense.
You can do this off-the-shelf. They make a 3-way L6-30 adapter.smkettner said:3x evse upgrade set to 10 amps each plugged into a shared 40a circuit.
Otherwise you will need to manually juggle the charging needs and priority.
Actually the NEC doesn't allow any 30A outlets on a 40A breaker, see 2008 NEC Table 210.21(B)(3) for the case of multiple receptacles on a circuit. The only time a receptacle can have a rating less than the breaker protecting it is for a 15A receptacle on a 20A circuit, which is fine as UL tests standard 15A receptacles for 20A pass through.Ingineer said:Also, for those that may cry foul, NEC allows multiple 30A outlets to be installed on a 40A breaker, you just can't install one 30A outlet on a 40A breaker, go figure.
You are reading this wrong. That requirement only applies to circuits over 50A:wwhitney said:Actually the NEC doesn't allow any 30A outlets on a 40A breaker, see 2008 NEC Table 210.21(B)(3) for the case of multiple receptacles on a circuit. The only time a receptacle can have a rating less than the breaker protecting it is for a 15A receptacle on a 20A circuit, which is fine as UL tests standard 15A receptacles for 20A pass through.
Cheers, Wayne
Note that Table 210.21(B)(3) Specifically is labelled "Maximum Cord-and-Plug-Connected Load to Receptacle". It's tricky! The "or" is referring to the branch circuit. As long as the maximum load placed on the receptacle doesn't exceed 24 amps for a 30 amp receptacle, and your circuit isn't above the 50A level, you can do it.(3) Receptacle Ratings. Where connected to a branch circuit supplying two or more receptacles or outlets, receptacle ratings shall conform to the values listed in Table 210.21(B)(3), or, where (said branch circuit) rated higher than 50 amperes, the receptacle rating shall not be less than the branch-circuit rating.
I don't think so. As you quoted, Table 210.21(B)(3) applies for circuits up to 50 amps, and then the second half of the 210.21(B)(3) applies to circuits over 50 amps.Ingineer said:You are reading this wrong. That requirement only applies to circuits over 50A:
That's the title to (2008) Table 210.21(B)(2). Table 210.21(B)(3) is "Receptacle Ratings for Various Size Circuits" and tells you, e.g., that on a 50 amp circuit with two or more receptacles, all receptacles must be 50 amps. So I think you may be looking at the wrong table.Ingineer said:Note that Table 210.21(B)(3) Specifically is labelled "Maximum Cord-and-Plug-Connected Load to Receptacle". It's tricky! The "or" is referring to the branch circuit. As long as the maximum load placed on the receptacle doesn't exceed 24 amps for a 30 amp receptacle, and your circuit isn't above the 50A level, you can do it.
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