Final answer:
The question seeks the minimum working space width for equipment operating at 1000 volts or less that might need servicing while energized. Grounding is a key safety feature for such electrical systems.
Step-by-step explanation:
The question pertains to the minimum width of the working space required around equipment that operates at 1000 volts nominal or less to ground, when such equipment is likely to need examination, adjustment, servicing, or maintenance while energized and is located in a space with limited access. The guidelines for electrical safety in this scenario are clearly dictated by codes and standards that ensure the safety of individuals working with or near electrical installations.
Grounding is a safety measure in electrical systems, ensuring that the conductor is at the same potential as the earth, effectively setting it to zero volts. This principle ensures that no significant voltage difference exists across the surface of the grounded conductor, thus protecting against electric shocks. Electrical installations must adhere to safety codes which may, for example, specify the required working space around electrical equipment for operational and safety reasons.