pantheraba
More biners!!!
My BIL was a naval sub Lt. Commander. He told me some about it...critical systems are tagged and locked so that someone cannot (theoretically) operate related systems and cause safety issues.
We sometimes find that on job sites where we have raw wires outside a circuit box before they get hooked up to x-ray equipment. The installing electrician puts a bolt thru the handle that energizes the circuit so that someone has to intentionally work to turn the circuit on...does not just take a casual flip of a switch to possibly electrocute someone.
Butch or Kyle can probably explain it better.
We sometimes find that on job sites where we have raw wires outside a circuit box before they get hooked up to x-ray equipment. The installing electrician puts a bolt thru the handle that energizes the circuit so that someone has to intentionally work to turn the circuit on...does not just take a casual flip of a switch to possibly electrocute someone.
Butch or Kyle can probably explain it better.