I need an outdoor junction box for 12.9mm armoured cable. I see that the holes on this are M20; is there space to drill out to M22?

Hi, thank you for your product enquiry.The knock-outs are 20mm diameter as standard but also have provision to be drilled out to a maximum size of 25mm, so they would be suitable for your requirements.

Are there terminal/conection points inside this junction box, Could really do with a picture of what's inside really.

Yes, there are terminal connectors inside the box. They are comprised of a (loose) strip of ordinary insulated connectors. It all works, 'though I would have preferred the connectors secured to the base of the box, like a junction box.

For the junction box if a cable comes in through the back how do I make it waterproof for water running down the wall?

You can buy a Wiring Grommet Rubber https://www.amazon.co.uk/FIXMAN-255645-Rubber-Grommets-35pce/dp/B01MA6T2HD/ref=alp_dpwidget_a_w_?th=1&psc=1&smid=A3P5ROKL5A1OLE If you search enough you can buy individual. I would suggest you also use a circle of sealant around the box for extra precaution.

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BG Electrical Outdoor Double Switch with LED Indicator, Weatherproof, Grey, Nexus Storm, 2-Way, 20A, IP66 Rated, WP42

BG Electrical Outdoor Double Switch with LED Indicator, Weatherproof, Grey, Nexus Storm, 2-Way, 20A, IP66 Rated, WP42

Product ID: 47925434

Details

Brand
British
Connector type
Screw
Contact type
Normally Open
Current rating
20 Amps
Item dimensions L x W x H
9 x 6.5 x 9
Material

⚡20A heavy-duty current

💧IP66 weatherproof & dustproof

🔆LED indicator for clear status

SAR 76

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Description

💡 Switch to Stormproof Power — Because your outdoor space deserves the best!

SMART LED INDICATOR - Stay informed at a glance with an LED light that signals switch status, customizable to your wiring needs.
POWERFUL 20 AMP CAPACITY - Handles high loads effortlessly, ensuring your outdoor circuits stay safe and reliable.
TRUSTED 25 YEAR GUARANTEE - Backed by BG Electrical’s quarter-century warranty, combining durability with peace of mind.
BUILT TO BRAVE THE ELEMENTS - IP66 rating means total protection against dust and powerful water jets—perfect for any outdoor setup.
FLEXIBLE INSTALLATION OPTIONS - Five 20mm knock-out entries on four sides give you ultimate cable routing freedom—no compromises.

The BG Electrical Outdoor Double Switch WP42 is a robust, IP66-rated weatherproof switch designed for 2-way control of outdoor electrical circuits. Featuring a 20 Amp current rating, a customizable LED indicator, and multiple cable entry points, it ensures safe, flexible, and reliable power management. With a 25-year warranty, it’s engineered for long-lasting performance in demanding environments.

Specifications

ASIN	B004R21LNW
Actuator Type	Switch
Best Sellers Rank	4,989 in DIY & Tools ( See Top 100 in DIY & Tools ) 41 in Switches & Dimmers
Brand	British General
Circuit Type	2-way
Colour	Light Grey Plastic
Compatible Devices	Weatherproof Electrical Devices
Connectivity Protocol	Wi-Fi
Connector Type	Screw
Contact Material	Plastic
Contact Type	Normally Open
Control Method	Touch
Control Type	2-way
Controller Type	Push Button
Country Of Origin	China
Current Rating	20 Amps
Customer Reviews	4.6 4.6 out of 5 stars (228)
EU Spare Part Availability Duration	25 Years
Global Trade Identification Number	05050765022149
Included Components	Single 2-Way, 2-Switch Outdoor Weatherproof Switch, IP66 Rated, 20 Amp
International Protection Rating	IP66
Item Dimensions	9 x 6.5 x 9 centimetres
Item Weight	0.2 Kilograms
Lower Temperature Rating	30 Degrees Fahrenheit
Manufacturer	Nexus (Jiaxing)
Manufacturer Part Number	WP42-01
Material	Polyvinylchlorid
Model Number	WP42-01
Mounting Type	Wall Mount
Number of Items	1
Number of Positions	2
Operating Voltage	250 Volts
Operation Mode	ON-OFF
Specification Met	[YES]
Switch Type	2-way
Terminal	physical
Unit Count	1.0 count
Upper Temperature Rating	100 Degrees Fahrenheit
Wattage	400 watts

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SAR 76

Duties & taxes included

In stock

Sold byAmazon KSADelivered 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 KSA.

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TrustScore 4.5 | 7,300+ reviews

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