What Is a Lockable Circuit Breaker?

Circuit breaker locks are installed to prevent the accidental or deliberate switching off of certain electrical circuits. Page top photo: a circuit breaker lock installed on a Square-D circuit breaker, appropriately colored red and tagged. This breaker lock can be opened only by a key.

What is a lockable breaker?

Circuit breakers are the primary point of electrical isolation for maintenance workers. ... Lockout devices for circuit breakers are designed to attach to the moving part, usually a switch toggle (rocker switch) which moves from the on to off position.

What is a lock out circuit?

[′läk‚au̇t ‚sər·kət] (electronics) A switching circuit which responds to concurrent inputs from a number of external circuits by responding to one, and only one, of these circuits at any time.