What is the DC retest voltage for Class 1 rubber gloves?

The DC retest voltage for Class 1 rubber gloves is 40,000 VDC. This voltage level is established based on safety standards that ensure the effectiveness of the insulation properties of rubber gloves used in electrical work. Class 1 gloves are designed for use in environments where voltage levels can reach up to 7,500 volts, and the retest voltage is set much higher to verify the gloves' integrity and ability to withstand potential exposure to electrical stresses.

Using a retest voltage significantly above the maximum rated voltage of the gloves helps to ensure that any degradation in the material's insulating properties, which may occur over time or through normal wear and tear, can be detected. Performing this retest is crucial for maintaining safety and preventing electrical hazards when working with energized equipment.

In contrast, the other options provided correspond to different classes or specifications of rubber gloves, which are designed for higher voltage ratings. The classification system for rubber insulating gloves includes various classes based on their voltage capabilities, with corresponding retest voltages that increase with the class designation.