I just did a reinspection on a 4 plex that needed gfci updates at required areas.
Also the main panel covers were not the correct size and left gaps around the breakers where the main lugs and breaker terminals were exposed. Anywhere from a 1/4 to a 1/2 inch.
The licensed electrician installed the gfcis to correct that issue.
To correct the panel issue, he used metal tape (foil hvac tape) to cover the gaps. Instead of replacing the panel and / or cover since the 1970 or 80 panel covers were not available (or easily available ) He claims that this is an acceptable method.
Or should it be repaired/fabricated with equivalent rigid sheet metal or plastic just like a breaker knock out insert?
Or replaced with a proper cover or a new panel.
This is also posted in the electrical forum.