Electrical equipment

Select protection by system voltage, rated current, pole count, breaking capacity and the required protection function. Distinguish MCB/MCCB/ACB, RCD/RCCB/RCBO, fuses, SPDs and switch-disconnectors. See how to choose electrical protection and switching devices, volt (V) and what is electric current (A).

Consider circuit/module capacity, load architecture, mounting method, DIN-rail/busbar compatibility, enclosure material and environmental protection. See how to choose an electrical panel, distribution board and enclosure and what is an IP rating.

Choose contactors, relays, timers, motor starters, overload relays, soft starters and variable-frequency drives by load type, current, coil/control voltage, phase arrangement and control architecture. Read how to choose contactors, relays and motor control devices.

Choose domestic or industrial sockets and plugs, switches, adapters, power strips, extension leads and cable reels by voltage/current, grounding, conductor size, IP rating and real load. See how to choose sockets, plugs, extension leads and power strips and how to use an extension cord safely.

Power/control cables and wire, conduit, trunking, cable tray, glands, lugs, ferrules, terminal blocks and connectors must suit conductor size, insulation, installation method and load. See how to choose electrical cable, conduit, trunking and connectors and what is insulation class.

For transformers, AC/DC power supplies, voltage stabilizers, UPS systems, inverters or power-conditioning equipment, match input/output voltage, VA/W capacity, starting current, waveform, backup duration and phase count. See how to choose a transformer, power supply, voltage stabilizer, UPS and inverter and what is frequency (Hz).

Choose energy meters, panel meters, network analyzers, current transformers and monitoring relays by single-/three-phase system, current range, accuracy class, communications and mounting method. Read how to choose electrical metering and monitoring devices.

Treat earth electrodes, bars, clamps, bonding conductors/connectors and lightning-protection components as one coordinated system, with SPDs selected in coordinated protection stages. See how to choose grounding and lightning protection equipment and essential fire safety rules.

Choose luminaires, work/emergency lighting, LED drivers, sensors and central emergency-lighting components by lighting task, power, environment, IP rating and required emergency runtime. Read how to choose lighting and emergency lighting electrical equipment.

For smart switches/actuators, sensors, thermostats, building-control devices or EV chargers, verify supply voltage, operating/charging current, control protocol, connectivity, protective devices and installation environment. See how to choose building control and EV charging electrical equipment.