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 Double Wall Light Switch, 2 Way, Raised and Slim Profile, Round Edges, Nexus Metal, Brushed Steel, 20A, 16AX, NBS42

Product ID: 49020447

Details

Brand
British
Connector type
Screw
Contact type
Normally Open
Current rating
20 Amps
Item dimensions L x W x H
8.6 x 3 x 8.6
Material
Alloy Steel

⚡20A high current rating

🔄2-way switching versatility

🛠️Easy installation with screws

NZ$24

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Description

⚡ Switch to sleek power — control your space with style!

EFFORTLESS SETUP - Comes with all necessary screws and clear instructions for a hassle-free installation experience.
COMPACT DURABLE - Slim profile with rounded edges crafted from robust alloy steel for lasting style and strength.
DUAL CONTROL CONVENIENCE - 2-way switching lets you control lights from two locations—perfect for dynamic living spaces.
POWERFUL 20 AMP CAPACITY - Handles high loads effortlessly, ensuring reliable performance for all your lighting needs.
SLEEK BRUSHED STEEL FINISH - Elevate your space with a modern, slim metal design that blends seamlessly with any décor.

The BG Electrical Double Wall Light Switch (NBS42) offers a premium brushed steel finish with a slim, raised profile and rounded edges. Rated for 20 amps and 16AX inductive loads, it supports 2-way switching for versatile lighting control. Designed for easy installation with included screws and instructions, this durable alloy steel switch fits standard mounting boxes with a minimum depth of 16mm. Ideal for modern homes seeking both functionality and aesthetic appeal.

Specifications

ASIN	B007CXBGE2
Actuator Type	Rocker
Best Sellers Rank	981 in DIY & Tools ( See Top 100 in DIY & Tools ) 10 in Wall Electrical Outlets
Brand	British General
Circuit Type	2-way
Colour	Brushed Steel
Compatible Devices	Light bulbs, lamps
Connectivity Protocol	Wi-Fi
Connector Type	Screw
Contact Material	Metal
Contact Type	Normally Open
Control Method	Touch
Control Type	2-way touch
Controller Type	Push Button
Country Of Origin	China
Current Rating	20 Amps
Customer Reviews	4.7 4.7 out of 5 stars (2,868)
EU Spare Part Availability Duration	25 Years
Included Components	switch
International Protection Rating	IP00
Item Dimensions	8.6 x 3 x 8.6 centimetres
Item Type Name	10AX Double 2-Way Metal Brushed Steel Light Switch
Item Weight	0.12 Kilograms
Lower Temperature Rating	10 Degrees Celsius
Manufacturer	Nexus (Jiaxing)
Manufacturer Part Number	NBS42-01
Material	Alloy Steel
Model Number	NBS42-02
Mounting Type	Wall Mount
Number of Items	1
Number of Positions	2
Operating Voltage	220 Volts
Operation Mode	ON-OFF-ON
Product Warranty	1 year
Specification Met	CE
Switch Type	Rocker
Terminal	Screw
Unit Count	12.0 gram
Upper Temperature Rating	40 Degrees Celsius
Wattage	4400 watts

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NZ$24

Duties & taxes included

In stock

Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to New Zealand.

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TrustScore 4.5 | 7,300+ reviews

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