This is why I don't switch on pool lights.
But then I live in a condo where the juristic head man had a brainstorm, put solar panels atop the building and connect 3 elevators to them.
They managed to do this, no checks, permits, nothing.
An owner/electrical engineer in the building notices the lifts would stop between floors, jolting stops, people getting stuck, doors not opening etc.
He asks the building staff why, they tell him, he calls everyone a fkcin idiot, it takes them a week to reconnect the lifts to the mains.
Reason: Looking for ways to cut condo running costs.