We picked up a second hand Sunkko 737G+ battery spot welder to do some in-house battery repacking work. I decided that instead of having a fixed mains power cord a chassis mounting IEC C14 socket would be a good idea. It makes it easier to store and to move around. And we have plenty of the matching mains cables with the C13 plug.
After fitting the C14 socket I did an electrical safety test. It failed on earth continuity because there was 2-3 ohms resistance. It did not take long to figure out the problem. The chassis earth goes to a screw holding one of the feet and there is no bare metal for the crimp connector to make contact with the chassis! Also, the crimp connector has been crimped incorrectly.
A separate screw, washers, and nuts on some bare metal fixed the problem.
This case is prime example of cheap, poor quality equipment purchased by individuals and shipped to New Zealand directly from overseas suppliers. If this item was sold by a New Zealand company and if a vigilant individual or organisation became aware of the issue it would be subject to a recall.
I don’t recommend buying any mains powered equipment from overseas unless it has been declared to be compliant with New Zealand regulations.
Leave a Reply