Tomasz said:
One thing that bothers me here - why nobody even blinks an eye if you put several outlets on one 110V 15A line, yet everybody say you need dedicated line for EVSE?
If the OP has one 30A 240V line and plugs both dryer and car to it it's up to him to remember not to run them at the same time, because when he does it will blow the fuse. Exactly the same as if he plugs two 15A space heaters to the same 15A line in his living room. WHy so much fuzz about it?
Mostly because that's what the eggheads who wrote the national electrical code decided. Over the years I've learned it's very well worth respecting what is written in there. It came out of a lot of research by a lot of very smart people.
I'd speculate that large 240 volt outlets are dedicated is because most appliances plugged in to those outlets are capable of drawing near the maximum allowed by the circuit, whereas small 115 volt appliances very rarely draw the full capacity of the circuit, and when they do, typically those oulets are called out to be dedicated as well, think washing machine, garbage disposal, 120 volt evse, etc.