Went to a callout this morning at a local Takeaway, customer reported small shocks from the microwave & then it went off.
When I got there I found that the local handyman had built them a new counter & he’d run a nice extension lead for the Microwave, looked at the extension lead & thought it was a bit thin. Turns out that he only had 2 core flex so used that hence the shocks & used a 5 amp fuse in the plug which thankfully went o/c causing dead symptom, what a muppet.