The control zone concerning a wire or cable should be its length plus:

The control zone concerning a wire or cable is determined as its length plus an additional percentage to ensure safety and mitigate risks associated with electrical hazards. In this context, the correct choice of 25% accounts for the possibility of the wire or cable having tension or movement, which could lead to it snapping or impacting others in the vicinity.

When establishing a control zone, it is essential to consider the potential reach of the wire or cable beyond its physical length. The 25% extension allows for an adequate buffer that provides additional safety for personnel working near the hazard. This distance helps to ensure that individuals remain at a safe distance from the potential point of failure, reducing the risk of injury from electrical shock or injury from the cable's recoil.

This approach to calculating the control zone reflects industry best practices, emphasizing precaution in environments where electrical elements are present. It's crucial for maintaining the safety of all responders and individuals at the scene of an incident involving wires or cables.