You've got a 60A circuit?
50a, I guess I wouldn't use the full 48a but a full 42a for sure
Well truthfully I'd also use 48a but only for short very quick charges, less than an hour or so. The 20% derating of our circuits is only for continuous use, short-term use is OK to get near the maximum
A small correction - for continuous duty a 50A circuit is limited to 40A, not 42A (50 x .8 = 40). Personally, even though continuous duty's 3+ hours, unless you've got a medical grade outlet and you know
the conductor's in good shape with good connections, I wouldn't push anything over 40A for an hour, but then I generally prefer a conservative approach.
Section 8, rule 8-104, sub-rule (3) CEC 23 edition:
"The calculated load in a consumer's service,feeder, or branch circuit shall be considered a continuous load unless it can be shown that in normal operation it will not persist for
(a) a total of more than 1h in any two-hour period if the load does not exceed 225A ;or
(b) a total of more than 3h in any six-hour period if the load exceeds 225A
I would think that American code is very similar in wording seeing as the breakers are manufactured in the States
So unless we start charging at 226A and every 3 hours I would consider continuous