Class 4 Gloves

Class 4 electrical insulating rubber gloves are designed for use with voltages up to 36,000 volts AC (36kV) and 54,000 volts DC (54kV). 

Here's a more detailed breakdown:

Voltage Rating:
Class 4 gloves are the highest voltage class, providing protection up to 36,000 volts AC (36kV) and 54,000 volts DC (54kV). 

Standards:
These gloves meet NFPA 70E Voltage Class 4 standards and are also compliant with EN 60903, a European standard. 

Testing:
Gloves are visually inspected and electrically tested at their proof test voltage in accordance with ASTM D120 specifications. 

Applications:
Class 4 gloves are used for working on or near energized parts in extra-high voltage systems.