Wondering if this is a positive thing or not.I'm curious to know where your doubt stems from?
(surely it cannot be from a total current draw stand-point as the P300 is rated for 3A nominal, 4.85A max. So, even if you had 2 of them running at full-bore you'd be well within the 15A outlet limit. You'd better have very good ventilation as the P300 would be sizzling hot by then!).