Killark KRS-218-220 - Suitable where a connection is required for portable or movable equipment such as tools, motors, hand lights, etc. Wire leads for termination. Factory sealed receptacles. Copper free aluminum housing. Straight or angle type back boxes. Delayed action contacts ensure safe interconnect. Extra long grounding pin makes contact first and breaks contact last Factory sealed receptacles. Copper free aluminum. Delayed action contacts. Extra long grounding pole makes contact first and breaks contact last. Heavy duty construction to withstand rough and constant usage. - Class I, Divisions 1 & 2, Groups C, D - Class I, Zones 1 & 2, Groups IIB,IIA