If your circuit breakers are in a public area, you may wish to add a little extra security to your electrical system. Did you know some brands can be handle-locked? Some types of Cutler Hammer circuit breakers allow installation of a padlock assembly. These padlocks can be placed in the left or right pole position and can protect up to a four-pole circuit breaker. Once installed, a padlock system can lock the circuit breaker into the "on" or "off" position.
It's very important to respect the same rules for installing a Cutler Hammer circuit breaker padlock system as you would any electrical component. A padlock doesn't use electricity, but any time you work around circuit breakers, the power should be completely off. You'll find instructions in the owner's manual requiring "no voltage present" conditions prior to installation. Remember that all warranties for circuit breakers, accessories and padlocks are voided if you do not follow the instructions to the letter.