Apparatus, instruments and equipment for conducting, switching, transforming, accumulating, regulating or controlling electricity in particular explosion-proof apparatus, instruments and equipment, namely, junction boxes, enclosures for power controllers, electric control panels and power distribution panels, electric fuse boxes, electrical pull boxes, electrical terminal boxes, electrical terminal block housings and enclosures, electrical connection boxes, electrical distribution boxes, distribution boxes for electrical power, electric junction box housings and enclosures, electric control panels, electric control panel housings and enclosures, power distribution panels, power distribution panel housings and enclosures, electrical controlling devices, housings and enclosures for electrical controlling devices, housings and enclosures for electric current switches, housings and enclosures for power switches, housings and enclosures for electric splices and branch circuit taps, housings and enclosures for electric meters, housings and enclosures for electrical plug devices enabling connection and disconnection of power and/or control cables, housings and enclosures for electric relays, circuit breakers, circuit boards, electric circuit closers, circuit breaker panel boards and electric circuit switches; mounts and mounting devices specially adapted for the aforementioned electrical boxes, housings and enclosures; safety equipment, namely, explosive containment vessels specially adapted for electrical equipment, apparatus and instruments; protective covers for electrical equipment, apparatus and instruments, housings and enclosures for electronic motor switches for switching off motors, protective housings and enclosures for pilot lights, housings and enclosures for electrical plug devices enabling connection and disconnection of power and/or control cables