FSQC 30, 60 and 100 A Series Receptacles incorporate an interlocked disconnect switch for added safety in hazardous environments. The explosionproof and dust-ignitionproof FSQC is designed for use with Powertite® plugs. Simply insert the plug and rotate the receptacle face to the ON position to lock it in place and energize the receptacle. For installations where different line voltages are used, a special polarization option prevents plug insertion into a receptacle wired for a different voltage.