Electrical insulated rubber gloves should be used to protect users from electrical shocks and burns.
According to OSHA (29 CFR 1910.137(c)(2)(viii) and the referenced Table I-5), all electrical gloves must be tested periodically and prior to being placed into service. In accordance with Table I-5, rubber insulating gloves must be tested before first issued and every six months thereafter or upon indication that the insulating value is suspect, after repair, after use without protectors, and when showing any signs of defects upon inspection.
Electrical safety gloves are categorized by the level of voltage protection they provide and whether or not they are resistant to ozone (which can be generated from oxygen by many electrical processes).
Ozone resistance is broken down into either Type I or Type II: Type I: not resistant to ozone; Type II: resistant to ozone.
If the electrical insulated gloves show any signs of the defects such as tears, holes, swelling, etc. upon inspection, they should be taken out of service for cleaning and retesting or replacement.
Leather protector gloves should be worn over a rubber insulating glove to provide protection from cuts, abrasions and punctures.