Description
The Knightsbridge 8301BN is a 1-way trailing edge pull cord dimmer switch rated for 10-150W incandescent loads or 5-100W LED loads, housed in a 75mm diameter black nickel ceiling rose. The trailing edge dimming technology provides smoother control for both modern LED and older incandescent bulbs, with an integrated potentiometer allowing the dimming curve to be fine-tuned during installation to eliminate flicker with specific lamp models.
Designed for ceiling mounting in bedrooms, home offices and any space where wall access is impractical or where a pull cord fits the room's design, the switch operates on a simple pull mechanism: one pull turns the light on or off, while holding the cord dims the light up or down. The 1.5m black fabric-covered cable gives reach from standard ceiling heights, and the cable length can be shortened during fitting if needed.
The black nickel finish is a dark gunmetal tone that sits between matt black and polished chrome, providing a contemporary alternative to standard white or brass ceiling roses. The 75mm diameter rose and 36mm depth accommodate standard ceiling wiring, and the Class II double-insulated construction removes the need for an earth connection. The switch carries an IP20 rating for dry indoor use and is certified to EN 60669-2.
Compatibility with specific LED lamps varies by manufacturer — always verify dimmer compatibility with the lamp maker before installation, particularly with low-wattage LEDs under 10W where minimum load requirements can cause issues.
Specification
| Diameter |
75 mm |
| Height |
36 mm |
| Construction |
Premium grade steel |
| Construction 2 |
& ABS |
| Finish |
Black Nickel |
| Class |
II |
| IP Rating |
IP20 |
| Primary Voltage |
230V 50Hz |
| Cable Length |
1.5 m |
| Warranty |
2 |
Downloads
Product Specification Sheet
Product Manual
Frequently Asked
What's the difference between trailing edge and leading edge dimming?
Trailing edge dimming is designed for LED and low-voltage loads and typically produces less electrical noise and smoother dimming at the low end of the range compared to leading edge dimmers, which were designed for incandescent bulbs. This Knightsbridge switch uses trailing edge technology, making it more suitable for modern LED lamps.
How do I adjust the dimming curve?
The integrated potentiometer is accessed inside the ceiling rose during installation. Turn the adjustment screw clockwise or anti-clockwise to change the minimum dim level, which can eliminate flicker or buzzing with specific LED lamps. Consult the product manual for the exact adjustment procedure.
Can it be used in a bathroom?
The IP20 rating limits the switch to dry indoor locations only. It cannot be installed within zones 0, 1 or 2 of a bathroom as defined by BS 7671 wiring regulations.
What if my LED bulb flickers on this dimmer?
Flicker typically occurs when the LED's minimum load is below the dimmer's minimum output, or when the lamp is not designed for dimming. First verify the LED is marked as dimmable. If flicker persists, adjust the potentiometer inside the ceiling rose to raise the minimum dim level, or try a different LED model from the lamp manufacturer's list of compatible dimmers.