02/01/2025
This is the perfect example of why the Canadian Electrical Code was changed several years ago to require arc-fault (AFCI) breakers. This chair was pushed up against the plug so tightly that the prongs on the plug were bent to the point that one of them was no longer in the receptacle. The cord was also being forced into a very sharp bend right at the end of the strain relief on the plug. The sharp bend in the cable can cause physical damage to the insulation causing power to flow from one conductor to the other through the damaged insulation causing heat. That heat causes resistance. The resistance causes more heat and the cycle continues until it either starts a fire, melts enough of the wire that the circuit fails or trips the breaker. In this case, with a chair pushed up tightly against the plug, the most likely failure would be a fire. Arc-fault breakers are designed to sense the unique electric field generated by failures of this type and disconnect power before the situation can progress to the point of having a fire.