Isolators vs breakers vs contactors: Isolators give manual, lockable disconnection for maintenance and do not protect against overload or faults. Circuit breakers and earth leakage units protect wiring and people from overload, short circuit and earth faults. Contactors switch motors and loads automatically from a starter, timer or control circuit.
Voltage, phase and rating: Confirm single-phase (230V) or three-phase (400V) before ordering. Match the component to the circuit's maximum load, not just the connected device, and check the breaking capacity (kA) of breakers and fuses in industrial or high-demand installations.
IP ratings: IP44 suits general indoor or covered outdoor use. IP65 is dust-tight and protected against water jets, so it suits outdoor and washdown areas. IP66/IP67 handles harsher, high-pressure water exposure. Match the rating to where the enclosure or isolator will be installed.
Enclosures and distribution boards: Size an enclosure for the components it must house, plus wiring space and future additions. For distribution boards, count the circuits (ways) needed now and allow spare capacity.
Wiring accessories and terminals: Choose switches, sockets and plates in a matching range for a consistent finish. For panel wiring, DIN rail terminal blocks, glands and trunking keep cabling tidy and serviceable.
Safety: Installation and wiring work must be done by a suitably qualified electrician in line with South African wiring regulations. Zisabo supplies components for qualified installers; please confirm compatibility and compliance before installation.
Still unsure? WhatsApp us your application, voltage/phase and rating and we'll recommend the correct component.
