Flame retardant UL 94V-2 thermoplastic shell provides excellent electrical insulation. Temperature rating 105°C (221°F). Fixed, precise square wire spring provides secure gripping of conductors. Deep skirt entry provides protection from flashover and shorts. Sure-grip ribs improve gripping ability and comfort. Compact design ensures proper installation especially in tight spaces. Threaded funnel entry guides the wires into the connector easily. Pre-twisting of wires is not necessary. 1,000 volt maximum in fixtures and signs.