Description
The Knightsbridge PM4W is a 10AX 3-gang 2-way wide rocker switch with a white screwless faceplate and anti-microbial surface treatment. The switch is designed to meet Part M Building Regulations for accessible dwellings, with wide rocker paddles that provide easier operation for users with limited dexterity and a light reflectance value of approximately 8.9 that creates visual contrast between the switch, plate and wall.
Designed for lighting circuits in residential, care home and accessible housing installations, the 10AX rating handles loads up to 2,300W per gang (230V lighting circuits). The 2-way switching configuration allows the same light to be controlled from two different wall positions, typical for staircases, hallways and landings. The screwless cover plate clips onto a separate metal sub-frame, concealing fixings for a cleaner finish.
The white thermoset resin construction provides a durable finish that resists discolouration and mechanical wear. The anti-microbial treatment is tested to ISO 22196:2011, reducing bacterial growth on the switch surface in environments where hygiene matters. The switch fits a standard 16mm minimum back box depth and projects 14.6mm from the wall once installed. Knightsbridge backs this switch with a 25-year guarantee.
Specification
| Height |
86mm |
| Width |
86mm |
| Depth |
28.9mm |
| Projection |
14.6mm |
| Recessed Depth |
14.5mm |
| Min. Mounting Box Depth |
16mmmm |
| Plate Depth |
9.5mm |
| Construction |
Thermoset resin |
| Finish |
Anthracite |
| IP Rating |
IP20 |
| Primary Voltage |
230V 50Hz |
| Anti-Microbial Properties |
3rd Party Tested to ISO 22196:2011 |
| Warranty |
25 Year Guarantee |
Downloads
Product Specification Sheet
Frequently Asked
What makes this switch Part M compliant?
Part M Building Regulations require switches in accessible dwellings to provide visual contrast and ease of operation. This switch has wide rocker paddles for easier activation and a light reflectance value of approximately 8.9, creating sufficient contrast against typical wall colours and the white plate itself.
What is 2-way switching?
2-way switching allows the same light to be controlled from two different wall positions. This is standard for staircases, hallways and landing areas where you need to turn lights on at one end of the space and off at the other. Each gang on this switch can be independently configured as part of a 2-way circuit.
What does the anti-microbial treatment do?
The anti-microbial treatment reduces bacterial growth on the switch surface. It has been tested to ISO 22196:2011, making it suitable for care homes, hospitals, kitchens and other environments where surface hygiene is important. The treatment is embedded in the thermoset resin and does not wear off with regular cleaning.
Can the screwless plate be removed for decorating?
Yes. The white cover plate clips onto a separate metal sub-frame fixed to the back box. The plate can be removed for painting or wallpapering around the switch and re-clipped without re-wiring.