Is this a trailing edge dimmer switch please, for dimmable LEDs?

The info states: "COMPATIBLE WITH LED ...... LAMPS: Thanks to the intelligent trailing edge dimmers having a lower minimum load than leading edge dimmers." This implies to me that it is a trailing edge dimmer. However, the top left of the same page states that it is a leading edge dimmer, as does the 'specifications' pdf. This also states that the dimmer unit will emit a faint buzz. Clicking on the link to the 'user manual'' pdf takes me to Swordfish Paper Trimmers.

Can you still uses this as a 1 gang 1 way switch for bedroom

I would suggest using a different switch BG NBS12 which is a 1 gang 2 way but you can use it as a 1 gang 1 way switch too.

can you use these switches for 1 way as well as 2 way

I have just wired this four gang two way switch for one way operation, the wiring advice states live to common terminal and switched live to L1 terminal however this causes the lights to come on with the switches in the off position and be off in the on position. A continuity test showed that terminal L2 was acting as L! and L1 was acting as L2, so I used L2 for switched live and all is well in the kitchen! Hope this helps.

What depth back box do I need for this?

It says 35mm on the technical specs.

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BG Electrical Intelligent Quadruple Wall Dimmer Switch, 2 Way, Raised Profile, Round Edges, Nexus Metal Brushed Steel 200W, NBS84

Product ID: 52623405

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Details

Operation mode
Current rating
1 Amps
Operating voltage
250 Volts (AC)
Contact type
Normally Open
Connector type
Screw
Brand
British

⚡200W Power

💡Smooth Dimming

🔒25-Year Warranty

Description

Illuminate Your Space with Style! ✨

EASY INSTALLATION - Clearly marked terminals make setup a breeze, even for the DIY novice.
OVERLOAD PROTECTION - Built-in safety feature prevents failure by automatically adjusting to load changes.
SLEEK STYLISH DESIGN - Elevate your space with a brushed steel finish that complements any decor.
MOISTURE RESISTANT GASKET - Protects against tarnishing, ensuring your dimmer stays pristine even in humid conditions.
INTELLIGENT DIMMING TECHNOLOGY - Experience seamless dimming for LED, CFL, and traditional bulbs without the buzz.

The BG Electrical Intelligent Quadruple Wall Dimmer Switch combines a sleek brushed steel design with advanced dimming technology, ensuring smooth operation for various light types. With a moisture-resistant gasket and overload protection, this dimmer is built for longevity and safety. Plus, it comes with a 25-year manufacturer's warranty, making it a reliable choice for any modern home.

Specifications

Manufacturer	BG Electrical
Part Number	NBS84P-01
Product Dimensions	14.6 x 4.4 x 8.6 cm; 260 g
Item model number	NBS84-01
Size	Quadruple Dimmer Switch
Colour	Brushed Steel
Style	Quadruple Dimmer Switch
Thickness	10 Mils
Wattage	200 watts
Item Package Quantity	1
Switch Type	2-way
Included Components	Quadruple Dimmer Switch
Batteries included?	No
Batteries Required?	No
Item Weight	260 g

Reviews

H**N

Looks good quality.

Nice neat looking fuse holder, looks quite nice, quality finish, good enough for me, doesn't look out of place next to my flat stainless steel plug sockets.

9.08.2025

M**S

Quality value replacement Shaver socket

Cured a very noisy hot 22 year old socket. Good qualityvery easy to fit great value. Enhanced thelook of bathroom. Safe again to use.

13.08.2025

L**R

Easy to install but may have issues

It buzzes a little and sometimes one or two bulbs flicker, but it's probably because I have two light fixtures with 6 bulbs each.It was easy to install and looks nice

18.06.2025

B**R

Good product

As an amateur DIYer BG are my preferred make for switches, sockets etc so have been very happy with this dimmer switch. Easy to fit, decent quality and a good price. Ticks all the boxes for me

31.07.2025

J**K

Good item

Really good switch, looking amazing, love it

12.08.2025

A**N

Size was accurate

Looks great in the kitchen, good value

4.08.2025

J**E

Excellent quality and looks great on wall.

7.08.2025

M**T

Great Quality light switch at a great price

I bought 6 of these switches to replace the old tatty white plastic ones in my flat, they are super easy to install took me just 30 minutes to install all 6 and they look great a real upgrade on the old ones. I was lucky enough to get them on sale so at £3.49 each an absolute bargain!

22.05.2025

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