Another quick test to see what happens in a wall when too much electrical current flows though some typical household wire inside a wall. In this case, we try some hardware store type spray foam insulation around the wire to see how the combination of wire and spray foam reacts when a series of electrical faults might result in significant over-current in the wire. Of course different spray foam, cable, electrical current and how they are combined will produce different results - maybe better, maybe worse!
