Originally Posted By: jgallant
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This message is also posted in the “General Inspection Discussion” forum. Sorry for the cross-post.
While backing out a screw on a sub panel cover today (I hadn't taken either the sub-panel cover or the service panel cover off yet), a "boom" noise occurred with plenty of sparks inside the sub-panel. A double-pole 60 amp breaker labeled "Furnace" had tripped. My guess is that a hot wire was in contact with the panel cover screw and that it shorted out. Glad I'm alive.
I left a note for the seller explaining what happened, and not to reset the breaker, and to have an electrician evaluate and repair, and to call me and discuss. The seller called and expects me to arrange and pay for all and any repairs.