What condition indicates that a breaker is locked out?

A breaker is considered to be locked out when it is de-energized, which means it is completely isolated from any electrical power. This condition is crucial for maintaining safety during maintenance or repair activities. Lockout/tagout procedures are implemented to ensure that the equipment remains de-energized and cannot be inadvertently energized while workers are performing their tasks.

Being de-energized not only minimizes the risk of electric shock but also allows workers to perform their duties with the assurance that the equipment is safe to handle. During a lockout situation, the breaker is typically tagged to indicate that it should not be turned back on until the work is completed and everyone is clear from the area.

The other conditions mentioned—worn out, being repaired, and in use—do not necessarily indicate that a breaker is in a locked-out state. For example, a breaker can be worn out but still energized, and while a breaker being repaired might suggest it isn’t operational, it does not confirm that it is securely locked out. In use indicates that the breaker is actively carrying electrical load, which further opposes the requirement for a lockout condition.