hi. if your mining with a good few rigs then take note. i checked my mining rigs today and all the wiring from the consumer unit to the wall socket. lucky i did as i had a very badly burned and melted 100 amp main switch. it was due to a loose connection which was arcing. so i suggest you all go check all your electrics just to be safe. the connections are brass and the wires are copper so they heat and expand at different rates. meaning the screws can loosen over time. if your putting a lot of power through it all you could have a problem