Sparks where water line grounding wire meets water line when microwave, plugged into outlet next to panel, was running. We’ve moved the microwave to a different outlet and our electricians are coming next week to inspect, but any ideas what could be causi

Sparks where water line grounding wire meets water line when microwave, plugged into outlet next to panel, was running. We’ve moved the microwave to a different outlet and our electricians are coming next week to inspect, but any ideas what could be causi