Grace Engineered Products' R-3W2 Voltage Indicator

R-3W2 externally mounted voltage indicator provides a visual indication of electrical energy inside an electrical panel. For UL Class 1 Div 2 areas and rated for UL Type 4X, 12 and 13 environments, it has a 40-750 Vac/30-1000 Vdc range, and carries a Category 3 and Category 4 surge rating for reliability on main power distribution buses.