I'm new to this forum, but am an HVAC professional. I've learned from the DIY crowd that HVAC guys are always looking for a way to rip-off their customers. Hence, I'd like to share my scam. The building guy was told by his very honest electrician that the reason his boiler pump motors kept burning out was the poor quality of power in the area. After I changed out the motor, I opened the disconnect-
I sold the guy on "motor protection" by putting together a bunch a buzzwords like, "3 phase motors don't have built-in thermal overload protection, so you need something to cut out in case of over-current or loss of phase. The chump fell for it.