Rubber Insulating Gloves
Rubber insulating gloves are seamless, voltage-rated dielectric rubber gloves manufactured and tested to ASTM/CSA electrical insulation standards. They are used with protector gloves and periodic testing/inspection to protect workers from electric shock during live-electrical work and energized equipment tasks, in accordance with WorkSafeBC, OSHA, and CSA Z462 requirements.
On a manufacturing floor, rubber insulating gloves are used when workers troubleshoot energized MCCs, control panels, or switchgear where de-energizing is not feasible. They are part of a shock protection system including arc-rated clothing, dielectric footwear, and face shields. Gloves must be matched to system voltage (e.g., Class 0 or 1 for 480/600 V AC) and worn with protector gloves to prevent mechanical damage. Daily pre-use inspections and air tests are required, with periodic electrical retesting every 6 months per OSHA. Repairs are limited to cuff areas; defects in hand/finger areas require glove replacement.
How do voltage classes for rubber insulating gloves relate to safe use on typical plant distribution voltages?
Under ASTM D120 and OSHA 1910.137, each glove class has a maximum use voltage and a higher proof-test voltage. For 480/600 V AC systems, Class 0 or Class 1 gloves are typically specified, ensuring the class equals or exceeds the system's nominal voltage and expected transient exposure.
What is the functional difference between Type I and Type II rubber insulating gloves?
Type I gloves are non-ozone-resistant, while Type II are ozone-resistant. The electrical rating (classes 00–4) is independent of Type. In environments with significant ozone (e.g., near high-voltage switching), Type II gloves resist cracking and surface degradation, preserving dielectric integrity.
How do water soak and moisture conditions affect rubber insulating glove performance?
OSHA requires gloves to withstand AC proof-test voltage after a 16-hour water soak, ensuring dielectric strength even when saturated. However, surface moisture with conductive contaminants can alter creepage paths and flashover behavior, so gloves must be kept clean and dry in practice.