What is the proof test voltage for Class 1 gloves?

• A. 7,500 volts
• B. 12,000 volts
• C. 9,000 volts
• D. 10,000 volts

Answer: (D)

The main idea is that insulating gloves are categorized by the maximum voltage they’re designed to protect against, and before use they undergo a proof test at a higher voltage to ensure the material has no hidden defects. For Class 1 gloves, the gloves are rated for up to 7,500 volts in use. The standard proof test voltage is higher—10,000 volts—so the glove is tested at this level to verify its integrity and ability to withstand insulation stress without breaking down. This margin helps catch micro-tears or weak spots that could fail in service. If a glove passes that test, it is considered safe to use at voltages up to its rated maximum.