Left hand rule: Rule stating that when preparing to close a breaker, disco, or bucket, stand to the left the equipment, using your left hand to operate the switch. That way if something goes terribly wrong, say and arc flash or explosion..you will only sustian injuries to your left hand.

Also the term chico, referring to the putty used in sealoffs. [Linked Image]

Luke Clarke
Electrical Planner for TVA.