Insulating covers are used for protection on equipment energized at what maximum voltage?

The correct answer for the maximum voltage at which insulating covers are generally used for protection on energized equipment is 21,000 VAC. Insulating covers are crucial for ensuring safety by providing a barrier that prevents accidental contact with live electrical parts, which can be particularly dangerous.

In many industry standards and safety regulations, insulating covers are specified for use at voltages up to 21,000 VAC. Beyond this threshold, additional safety measures or equipment may be required to ensure worker safety. The use of insulating covers at this specific voltage helps mitigate the risks associated with electrical shock or short circuits, thus promoting a safer working environment.

While higher voltages do exist in various applications, they often require different types of protective measures and specialized equipment. Hence, the 21,000 VAC limit is often recognized as a standard guideline for the use of insulating covers in electrical safety practices.