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Well, crap, you can’t ssy anything without knowing the distance. Resistance depends on distance.I ***THINK*** you could put a 6-20 outlet on it. 20A / 240V. But there are lots of factors involved.
What would happen if we tried to use that?
Well, crap, you can’t ssy anything without knowing the distance. Resistance depends on distance.
Having said that, 20 Amp is pretty innocuous but not too useful for charging.
Yep, but OP asked about 14-50. Really not too useful for that.And if it’s shoved in a conduit with lots of other stuff...
20a / 240v would charge most folks overnight. It should at least be considered as the low cost alternative.
We already have
2 #3 THHN CU
1 #8 THHN CU
5 #12 copper
inside of 1.5" Conduit that has 1 Radius out of panel > 10' straight shot > Radius up into a stub at location.
And many years in the future!Seriously, if you want real numbers, see the FAQ in my sig. There are hundreds of posts here and lots of places to get what size wire should be used (code-wise) for x amps at y feet. It's an NEC code requirement, not a Tesla question and we've been talking about it for years and years....
Sigh... I guess so... Seriously, though, it's too bad many electricians seem to have varying answers to installing a simple socket (14-50) or circuit for an HPWC.And many years in the future!
By code, particularly if the outlet is outside, the circuit is required to be protected. Has anyone experienced or heard of issues with gfci breakers tripping on the 240 volt chargers?
We have existing conduit that would be very hard to pull new wire through. There is already unused #12 copper run in it. What would happen if we tried to use that?
I ***THINK*** you could put a 6-20 outlet on it. 20A / 240V. But there are lots of factors involved.
Well, crap, you can’t ssy anything without knowing the distance. Resistance depends on distance.
Having said that, 20 Amp is pretty innocuous but not too useful for charging.
02 gauge. 240 v, 100 amp, 4 wire, red, black, white, green, at home depot. You don't need in conduit if in garage. Buy 14.50 box and receptical at HD . Depending on house service? 100 or 200 amp on what CB you buy.
You need double empty to install CB . Took me about an hour to istall. Only 6 feet to my plug from box.
Yep, but OP asked about 14-50. Really not too useful for that.
A lot of the questions for charging are for worst case and what do you want to spend your $$ on for convenience. I have two HPWCs and a 100 Amp circuit so that both cars (when we get the 3) will be fully charged when we need them. A simpler answer would be one UMC and one 14-50 or even a smaller socket/circuit. But that’s a lot of hassle and back and forth. It’s all a trade-off.
We already have
2 #3 THHN CU
1 #8 THHN CU
5 #12 copper
inside of 1.5" Conduit that has 1 Radius out of panel > 10' straight shot > Radius up into a stub at location.
Sigh... I guess so... Seriously, though, it's too bad many electricians seem to have varying answers to installing a simple socket (14-50) or circuit for an HPWC.
By code, particularly if the outlet is outside, the circuit is required to be protected. Has anyone experienced or heard of issues with gfci breakers tripping on the 240 volt chargers?
Yes, Standard GFCI has a 5mA trip limit, EVSE have a 20mA limit.
I searched previously and did not find any code requirements for outside 240V outlets (that aren't for a hot tub/ pool pump) (only 15A and 20A 120V).
Ok, now we get into the meat of it! If you have more than three current carrying conductors in a raceway longer than 24 inches you have to derate their ampacity. So a #12 copper THHN is good to 25 amps at 75c rating. 80% of that is 20 amps so even if you have to derate at the first step (4-6 current carrying conductors requires derating to 80%) you are good (as long as no other adjustments like ambient temp are necessary).
Yes, I've seen that reported several times. There's how things are "designed" and then there's how they "are". That UMC grounding test is supposed to be small enough current that it's below the threshold of a GFCI to trip, but there is very little margin in between, and apparently old GFCI outlets or breakers can degrade a bit from what their original specifications were supposed to be, and can have those tripping problems from a UMC. Replacing the old GFCI outlet with a new one usually fixes it.Yeah, so I am curious if anyone has had GFCI issues on 15a and 20a 120v circuits with the UMC. The UMC tests for voltage from hot to ground to make sure it is connected to ground before it will supply power to the car, but I am sure they have carefully designed it to not leak too much current that it would trip a GFCI. I have to imagine that pretty much any 15a or 20a 120v outlet you would think to plug a UMC into should already be GFCI protected. If it blew GFCI's that would be a pretty massive product fail...