Electrical Glove Classes — ASTM D120 (2026 Guide)
Electrical glove classes run from Class 00 at 500 volts to Class 4 at 36,000 — built to ASTM D120 and policed by OSHA 1910.137's 6-month retest clock, daily air test, and leather-protector rule. This guide decodes the voltage table, the label colors, the "insulated" naming trap, the defects that condemn a glove, and a worked 480 V spec.