What hazard is associated with maintaining power for other circuits while working on substations?

Maintaining power for other circuits while working on substations significantly heightens the risk of electrical exposure. This is due to the inherent nature of substations, where high voltages and currents are present. When power is maintained, technicians and workers may be exposed to live electrical components, which can lead to serious accidents such as electric shocks or electrical arc incidents. Understanding this hazard is crucial for ensuring safety protocols are in place, including the use of personal protective equipment and proper lockout/tagout procedures.

The other options, while they may impact the work environment in some way, do not directly address the substantial safety concern posed by live electricity in substations. Increased noise pollution, limited access to equipment, and decreased efficiency of work processes are relevant but secondary considerations compared to the critical nature of electrical exposure risks.