Don't put all six locks on a single hasp? Fine. But never put all six keys in a box "just in case." That defeats the purpose of personal accountability.
Just because the motor burned out doesn't mean the capacitor is dead. Capacitors can hold lethal voltage for months. Always treat broken equipment as fully energized. use loto
Tell everyone in the zone: "Shutting down Line 4 for repair. Do not restore power." Don't put all six locks on a single hasp