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

€ 21.58

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Description

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

STAY IN THE KNOW - Integrated LED indicator light keeps you informed of switch status at a glance.
POWER UP WITH CONFIDENCE - Handles a robust 20 amps for reliable outdoor performance.
BUILT TO BRAVE THE ELEMENTS - IP66 rating ensures total protection against dust and powerful water jets.
TRUSTED DURABILITY GUARANTEED - Backed by a 25-year warranty for peace of mind in every switch.
FLEXIBLE INSTALLATION ZERO HASSLE - Multiple 20mm knock-out entries and clearly marked terminals speed up setup.

The BG Electrical Outdoor Double Switch WP42 is a high-impact, weatherproof 2-way switch rated at 20 amps and IP66 for dust and water resistance. Featuring an LED indicator for clear operational status and multiple cable entry options, it ensures flexible, safe, and reliable outdoor electrical control. Designed for easy installation with captive screws and backed by a 25-year warranty, it’s the ultimate choice for professional-grade outdoor electrical setups.

Specifications

ASIN	B004R21LNW
Actuator Type	Switch
Best Sellers Rank	3,512 in DIY & Tools ( See Top 100 in DIY & Tools ) 28 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
Connector type	Screw
Contact Material	Plastic
Contact Type	Normally Open
Contact type	Normally Open
Control Method	Touch
Control Type	2-way
Controller Type	Push Button
Country Of Origin	China
Current Rating	20 Amps
Current rating	20 Amps
Customer Reviews	4.6 out of 5 stars 230 Reviews
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
Operating voltage	250 Volts
Operation Mode	ON-OFF
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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€ 21.58

Duties & taxes included

In stock

Sold byAmazon SpainDelivered 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 Spain.

Secure transaction

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Fast, free shipping, member pricing & priority support.

Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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