Twin Screw 100A Main Switch 2 Pole WIS2100

The WIS2100 2-Pole 100A Main Switch provides safe and reliable isolation for residential, commercial, and light industrial electrical systems. Designed with twin screw terminals for a secure and stable fit, this switch ensures strong connections that reduce the risk of loose wiring or overheating.

Its double-pole design isolates both live and neutral conductors, making it an essential choice for consumer units, submains, and distribution boards. A colour-coded operating handle improves visibility and ease of operation, ensuring quick identification in an emergency or maintenance scenario.

Compact at only 35mm wide, this 100A main switch is ideal where space is limited, while still delivering the high capacity required for modern electrical installations. For pre-fitted options, see our 6 Way Consumer Units or 8 Way Consumer Units.

• Model: WIS2100
• Rated Current: 100A
• Poles: 2 Pole (Double Pole)
• Voltage Rating: 230V AC
• Terminal Type: Twin screw terminals for secure wiring
• Handle: Colour-coded for easy identification
• Dimensions: 35mm (W) x 103mm (H) x 65mm (D)
• Construction: Durable materials for long service life
• Conforms to IEC/EN standards

• Ensure power is fully isolated before installation.
• Mount securely within consumer units or distribution boards.
• Twin screw terminals allow for a more secure grip — torque screws as per manufacturer guidance.
• Designed for 230V systems — verify compatibility before use.
• Complies with BS 7671 requirements for main isolation switches.

Is this main switch suitable for residential use?

Yes – the WIS2100 is widely used in consumer units for homes, providing safe isolation of both live and neutral conductors.

What does “twin screw terminals” mean?

Each terminal uses a double screw design, ensuring a stronger and more stable grip on the conductor, reducing the risk of loose wiring. For installations requiring full external isolation, see our 100A Meter Isolator.

Can this be used as the main isolator in a submain?

Yes – the 100A rating and 2P design make it suitable for submains, backup systems, or as the main isolator in smaller boards. For larger three-phase setups, consider our 125A 3 Phase Distribution Board.

Does it fit standard consumer units?

Yes – at 35mm wide, this main switch is compact and designed for integration into most standard distribution boards and consumer units. For added protection, pair it with a Type 2 SPD.