Where should personal protective grounds at a substation be attached?

Personal protective grounds are a crucial safety measure in substations, designed to prevent electrical shock hazards and ensure the safety of workers during maintenance activities.

The correct approach is to attach personal protective grounds to all possible source points. This allows the grounding system to effectively mitigate the risk of energization from multiple sources, thereby creating a safe work environment. By grounding at various potential points of electrical energy, which includes buses, transformer connections, and other equipment, workers can reduce the risk of electrical faults or backfeed that could result in serious injury or fatality.

Options that suggest grounding to the closest fence, to non-operational areas only, or to the main control board do not provide comprehensive safety against all potential sources of electrical energy in a substation. The main purpose of grounding is to ensure that any potential electrical energy is routed safely to the ground, rather than allowing it to pose a risk to personnel. Therefore, attaching grounds to all possible source points is the most effective and recommended practice for ensuring maximum safety in substations.