I'm not a code expert, but as I understand it, in the addition to what Jay Summet said, the NEC generally prohibits connecting either 15 or 20 amp receptacles to a 30 amp branch circuit. Receptacles must be 30 amp. The fact that you're allowed to connect 15 amp 120v recepts to a 20 amp branch circuit is kind of an exception already.
What you're doing sounds like tap conductors. There's a whole list of rules for tapping a 240v feed for lower ampacity 120v circuits. See here: https://www.mikeholt.com/mojonewsarchive/NEC- HTML/HTML/FeederSecondaryTapRules~20020326.htm https://v.gd/Nosfgd A much easier way to do this (fewer, less complex rules), and more convenient for the user if a breaker trips, is to install a small rainproof subpanel at the charging location. You would then use that to supply separate breaker-protected 240v and 120v circuits for charging. Ground and neutral must be separated at all subpanels (requires a 4-wire feed). The receptacles must have heavy duty in-use covers. I believe there is (or used to be) a code exception that allows a size smaller neutral (12 vs 10, 4 vs 2, etc) feeding a subpanel if a load calculation shows that the 120v loads will be approximately balanced. I don't think that you could show that in this instance, so it probably doesn't apply, if it even still exists. But -- NOTE WELL -- all this is moot unless you're a licensed electrician. Maybe you are, I don't know, but the fact that you didn't know what the NEC said about this makes me think that you might not be. It's illegal for an unlicensed person, no matter how knowledgable, to perform electrical work in or on a public building such as a church. You can't even work on a rental dwelling that you either own or rent. You're only allowed to work on the wiring in your own owner-occupied house, and then only with a permit. David Roden - Akron, Ohio, USA EVDL Administrator = = = = = = = = = = = = = = = = = = = = = = = = = = = = = EVDL Information: http://www.evdl.org/help/ = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Note: mail sent to "evpost" and "etpost" addresses will not reach me. To send a private message, please obtain my email address from the webpage http://www.evdl.org/help/ . = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
