4 Pole 100A Main Switch with Twin Screw Terminals – WME4100
£18.15
£24.50
18th Ed. Compliant
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The WME4100 is a 4 pole 100A main switch with twin screw terminals, designed for secure, reliable isolation on three-phase consumer units and distribution boards. With dual top terminal screws and a colour coded handle, it is built for installers who want a stronger, more dependable connection on higher-demand boards....
The WME4100 is a 4 pole 100A main switch with twin screw terminals, designed for secure, reliable isolation on three-phase consumer units and distribution boards. With dual top terminal screws and a colour coded handle, it is built for installers who want a stronger, more dependable connection on higher-demand boards.
Rated at 100A and suited to 400V applications, this unit is ideal where all three phases and neutral need to be switched together. The twin screw terminal format helps improve cable security and termination confidence compared with standard single-screw arrangements.
Installer note: This is the 4 pole twin screw terminal version, suited to three-phase board applications. Image currently shown is the 2 pole version for illustration only until the correct product image is uploaded.
- 4 pole 100A main switch – for three-phase isolation
- Twin screw terminals – improved connection security
- 400V rated – suited to three-phase board applications
- Colour coded handle – clear identification on site
- Designed for consumer units and distribution boards
- Compact format – 70 x 103 x 65mm
Compare Twin Screw Main Switches
| Model | Poles | Terminal Style | Typical Use |
|---|---|---|---|
| WME2100 | 2 Pole | Twin screw terminals | Single-phase consumer units and board incomers |
| WME4100 (This Product) | 4 Pole | Twin screw terminals | Three-phase consumer units and distribution boards |
| WIS2100 | 2 Pole | Twin screw terminals | Single-phase switching duties |
| WIS4100 | 4 Pole | Twin screw terminals | Three-phase switching and board isolation |
For more three-phase switching options, browse our Main Switches & Rotary Isolators or view related Three-Phase boards and accessories.
What is the WME4100 used for?
The WME4100 is used as a 4 pole 100A main switch for three-phase consumer units and distribution boards, where all phases and neutral need to be isolated together.
What is the benefit of twin screw terminals?
Twin screw terminals provide a more secure connection by improving conductor clamping and reducing the risk of loose terminations on higher-demand board applications.
Is this suitable for single-phase installations?
No. This model is the 4 pole version and is generally intended for three-phase systems. For single-phase applications, use the WME2100 2 Pole Main Switch.
What is the difference between WME4100 and WIS4100?
Both are 4 pole 100A twin screw main switches, but they belong to different product series. Check board compatibility, dimensions and assembly requirements before ordering.
Does this isolate all phases and neutral together?
Yes. As a 4 pole main switch, it is designed to isolate all three phases and the neutral together.
- Model: WME4100
- Product Type: 4 Pole Main Switch
- Rated Current: 100A
- Rated Voltage: 400V
- Number of Poles: 4 Pole
- Terminal Type: Twin screw / dual top terminal screws
- Handle: Colour coded
- Dimensions (W x H x D): 70 x 103 x 65mm
- Application: Three-phase consumer units and distribution boards
This 4 pole 100A main switch should be installed by a qualified electrician as part of a compatible three-phase board or distribution assembly.
- Suitable for three-phase switching applications rated up to 100A
- Twin screw terminals should be tightened correctly for secure cable retention
- Check enclosure and board compatibility before fitting
- Ensure safe clearance for handle operation and isolation access
- Verify full phase and neutral isolation after installation
