Thanks for your reply. That’s why he only installed the NEMA 14-50 plug and let me install the plug to the HPWC myself.
Why did he recommend this configuration?
Also, if your jurisdiction follows 2017 NEC and has not modified it, that 14-50 is required to be on a very expensive GFCI breaker. Did he install one? If the HPWC was hard wired it would. It require one.
I don’t understand this obsession with plugging in HPWC’s with pigtails. Other than the fact that it violates the install instructions and NEC, it also limits you to 40 amps. I used aboit the only advantage is that it counts as begin a disconnect, although you don’t need a disconnect if your breaker is 60a or below.
(But from a practical standpoint this is likely not obviously dangerous)