Before working on a de-energized primary circuit, which of the following is NOT required?

When working on a de-energized primary circuit, safety protocols are paramount to ensure the protection of the linemen involved. Providing a visible open break is essential as it indicates that the circuit is de-energized, helping to prevent accidental reconnection. Testing the voltage is a critical step to confirm that the lines are indeed de-energized and to verify that there is no residual voltage present, ensuring a safe working environment.

Grounding the equipment is another vital safety measure. It helps to prevent any unintended voltage from building up, thereby protecting workers from electric shock should a fault occur while working on the circuit.

Connecting a backup generator is not required before working on a de-energized circuit. In fact, this step is typically related to providing power during outages or maintaining operations, rather than ensuring safety during maintenance or repair of electric lines. Thus, while the other steps involve direct safety measures for linemen, connecting a backup generator does not pertain to the immediate safety protocol for working on a de-energized primary circuit.