LeftieBiker wrote: ↑
Fri Aug 21, 2020 7:54 pm
Nubo wrote: ↑
Fri Aug 21, 2020 7:50 pm
The ground/neutral discussion is getting ahead of things. As far as I'm aware, "tapping" a 240V circuit is not allowed at all by code. A 240V breaker is meant to protect one, and only one load. Saying "we'll be careful" is not sufficient.
The way to handle this is with a Either/Or switch that allows only one of two loads to be on the circuit at any one time.
There is also a way to kinda-sorta comply with the NEC on this charging setup - emphasis on the "kinda": don't charge for more than 2 1/2 hours at a time. This complies with the spirit of the 80% load rule, if not the letter. The problem is that unless you set a charge timer every time, or use an outlet timer of some sort, you are bound to forget to unplug after 150 minutes eventually.
The definition of continuous depends on the load up to 3 hours I know is used for lighting and heating circuits but the term continuous can mean as little as 20 minutes on appliances, such as an evse.
Ultimately code comes down to what what the inspector will and will not sign off on.
My professionally designed completely legal state inspected solar power generation system is actually not up to code because you can only back feed 20% of what a panel is rated for. My name plate is 9.5kw, 30 actual amps are back fed into a 125 amp panel. That 125 amp panel with 30 amps going back technically, according to NEC is over loaded.
But the state inspector signed off on it, but not worried about it and I'm highly proficient in this line of work. I installed that 125 amp panel to back feed a 3 or 4 kw name plate system, not 9.5kw.
"THE ABOVE POST CONTAINS MISLEADING AND INACCURATE INFORMATION. PLEASE CONSIDER IT OPINION, NOT FACT". -someone who I offended and is unable to produce the facts in question.