Quote Originally Posted by ericks View Post
You are correct, some suppliers supply undersized/under rated connectors. Full load current of a three phase motor is not split between phases. However your spindle might never draw the full load current. But if your motor is rated for say 10A that means ten amps per phase and you should have a cable and plug that is rated minimum 10A...:)

...just to add, a loose connection is obviously something that will likely damage any connector no matter the current rating
I have fitted well into the 100's of these Chinese spindles and I've had ZERO fail due to the connectors not being able to handle the load.
In my experience, the only weak link (other than being lower quality to brand names) with these spindles/VFD's is a lack of cable restraint. Both at the Spindle and the VFD you need to restrain the cable so the don't move around. I've only ever had 3 fails with connector faults and all of them where because the cable restraint I'd fitted had been left unconnected after the customer had moved or adjusted spindle etc and not fastened cables back up.

It's common sense really. . . which isn't so common these days.!