yeah, typical residential wiring isn't built for 24/7 pedal to the metal heavy continuous electrical loads -- one rule of thumb I use: if any connection, like a receptacle, is warm to the touch then it needs to be monitored closely. If it is hot then failure is imminent and it needs to be fixed immediately -- especially in a residential environment. Also need smoke detectors and fire extinguisher for electronics like CO2. Those cheap disposable extinguishers might put the fire out, but may ruin your electronics, and make a huge mess

An ammeter to check actual amp draw on your mining circuits in the breaker panel  and laser temp gun can help make things easier to monitor