Low profile circuit breaker lock-out assembly

An electrical panel assembly comprising:

• at least one circuit breaker;
• and
• a low-profile circuit breaker lock-out assembly mounted to the at least one circuit breaker, the low-profile circuit breaker lock-out assembly including:
• a first mount for mounting to a first end of a circuit breaker housing wall adjacent a circuit breaker switch lever, the first mount including an outward projection having a through-hole;
• and
• a second mount for mounting to a second end of the circuit breaker housing wall, the second mount including a pivotally attached arm that is rotatable between an unlocked position and a locked position in which the arm is aligned with the outward projection thereby allowing a lock to be inserted through the projection through-hole and a corresponding hole in the arm, the second mount defining a cut-out channel partially along its length, and the arm pivotally attached in the cut-out channel, the arm being rotatable to be at least partially positioned within the cut-out channel when the arm is in the unlocked position and the low-profile circuit-breaker lock-out assembly remains mounted to the at least one circuit breaker,
• wherein the arm is shaped to receive the circuit breaker switch lever and hold the switch lever immobile when the arm is in the locked position and the lock is secured to the low-profile circuit breaker lock-out assembly.