![]() The welder is an HTP Invertig 221H inverter. The big issue here is that there is, of necessity, no protection on the ground circuit, and had the welding been of longer duration or higher amperage the resulting damage could have been extensive. Thought about it for a few seconds, and sure enough the supply cord to the wall was rather warm the entire length! The current return had been through the 12ga ground to the regular shop wiring. Welding went fine, and it was only while coiling up the leads I realized I hadn't attached the ground clamp. ![]() The welds (aluminum 150A) were short with a cool down in the middle for grinding out the backside. ![]() My table is on casters, all steel and has multiple 120V outlets around the perimeter which are supplied with a 12ga cord from the shop wall outlets. Had another senior moment this morning & forgot to attach the ground clamp to the welding table/workbench.
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