quote" When you lock out a circuit, please be sure it is the correct one. If the wrong one is locked out and you have short circuited the circuit where you are working on it. Even with siren in place you won't hear anything other than the kaboooom on other end."
Actually if you were to try to do it as stated above, the "kaboom" will be in your hands right where you are. If you locked out the wrong circuit, obviously, you will now be shorting out a live circuit. Hope it isn't much above 120 v at 20 amps if you do this mistake.
