What does a clearance order signify in electrical work?

A clearance order signifies complete isolation in electrical work, indicating that all necessary measures have been taken to ensure that an electrical system or component is entirely free of electrical energy and is safe for workers to perform their tasks. This is crucial for ensuring the safety and well-being of personnel working on electrical equipment or systems, as it eliminates the risk of accidental shock or electrocution.

When a clearance order is issued, it typically means that the electrical supply to the circuit or equipment has been turned off, locked out, and tagged in accordance with established safety procedures. This process involves verifying that the system is indeed de-energized and that all relevant personnel are aware that work is being conducted in the area.

In contrast, the other options do not adequately capture the implications of a clearance order. A temporary disconnection would suggest that the electrical system might still be energized or could be re-energized without following the proper safety protocols. Partial isolation might imply that some parts of the system remain connected to a power source, which is risky. Electrical testing signifies a different context, where equipment is deliberately energized to measure certain parameters, which doesn't align with the intent of a clearance order.