Generic Chinese VFD, no CE and no earth connection to exposed metal heatsink

[john swift]

Jeff
I would say yes , its the norm

Going by the photos in various Chinese 6040 router threads
earthing is an after thought at best as they work without an earth , don't they !!!

it would appear the routers normally have the mains earth to the control box fastened to a painted metal surface !!!

the 220V 3 phase VFD output wired to a chassis mounting plug !!! not a socket
with no earth wire connected to the water cooled spindle motor
so I will expect there will be enough leakage current to the spindle motor and the rest of the machine to be felt when touched

I guess the lack of any earth wiring to the rest of the machine avoids earth loops in the signal wiring to and from the breakout board

I have a 4 ft LED light that I added an earth to the metal case
the upside is the 36W LED is brighter than the 2 x 36W florescent light it replaced

I have also rewired the mini-lathe I have as the push on connectors used was made from brass that was too thin to maintain good contact pressure


John