Handles or levers on circuit breakers must be...

Handles or levers on circuit breakers must be either isolated or guarded to ensure safety and prevent accidental operation. This requirement is crucial because circuit breakers are integral to protecting electrical systems from overloads and short circuits. If these handles or levers are exposed and easily accessible, there is a risk that individuals may inadvertently operate the breakers, leading to potential harm or electrical hazards.

Isolation involves ensuring that the circuit breaker is physically separated from unintentional contact. This can be accomplished by design features that keep the handles out of reach or in spaces that require a specific action to access, which reduces the risk of unintended operation.

Guarding, on the other hand, involves utilizing barriers or protective enclosures that prevent accidental contact with the circuit breaker handles. This can be particularly important in environments where untrained personnel or unauthorized individuals may be present.

By requiring that circuit breaker handles are either isolated from accidental use or guarded, safety standards are maintained, reducing the risk of electrical accidents and injuries. This rationale aligns with best practices in electrical safety and helps ensure that equipment can function properly while minimizing risks.