
Collingwood JB3 Waterproof Junction Box

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Rated five stars by thousands of customers since 2014 - see our full review history here
1 year Warranty
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A Dry, Secure Home For Outdoor Cable Connections
Running RGB or RGBW lighting outside means dealing with joins in the cable at some point, and every one of those joins needs to stay dry. The Collingwood JB3 gives you a small, tough box to make that connection properly instead of relying on tape or a bag over the wires.
Built For Collingwood's RGB and RGBW Cable
The JB3 is made from plastic and measures 85mm by 85mm by 50mm, small enough to tuck away in a border or under a step. It's built around a 5 way terminal block with one input and up to seven outputs, so a single box can split a feed several ways. It's designed specifically for Collingwood's 4 x 0.75mm PVC RGB cable, so it isn't a general purpose connector for standard 2 core cable.
How It Works
Cable enters through one of the box's sealed glands and lands on the terminal block inside. From there, up to seven separate cables can branch off to feed different fittings or continue a run further round a scheme. The lid clips down over an O ring seal, closing the whole connection off from rain, soil moisture and standing water.
Where It Works Best
Use the JB3 wherever an outdoor RGB or RGBW lighting run needs to branch, extend or join. That could be a flower bed where several ground lights need feeding from one cable, a spot under decking where a run has to change direction, or any exposed corner of a garden scheme where a bare joint would otherwise be at risk. If a scheme needs more outputs than one box can provide, further JB3 boxes can be daisy chained together to keep expanding it.
About Collingwood Lighting
Collingwood Lighting designs and manufactures its LED products from Sywell in Northamptonshire, and has specialised in LED technology since 2002. The brand says it was among the first to bring fully waterproof, sealed for life LED products to the UK electrical wholesale market, which fits a product whose entire job is keeping a wired joint dry for good. Collingwood has also been awarded a Gold medal by EcoVadis, placing it in the top 5% of companies assessed globally for sustainability.
Good to Know
- Rated IP66, sealed against dust and powerful water jets, so it's suited to exposed outdoor spots such as flower beds, borders or under decking.
- Made from plastic and covered by a 1 year warranty.
- Designed for Collingwood's 4 x 0.75mm PVC RGB cable rather than standard 2 core cable, so check compatibility before ordering.
- Built around a 5 way terminal block, 1 input and up to 7 outputs, and multiple boxes can be daisy chained for larger schemes.
Questions People Ask
Can I use the JB3 with standard 2 core cable?
No. The JB3 is designed for Collingwood's 4 x 0.75mm PVC RGB cable, so it isn't intended as a universal connector for standard 2 core wiring.
How many outputs does one JB3 have?
It's built around a 5 way terminal block with one input and up to seven outputs, so a single box can split a run in several directions.
Can I connect more than one JB3 together?
Yes. Multiple JB3 boxes can be daisy chained where a lighting scheme needs more outputs than one box provides.
Is the JB3 suitable for wet or exposed locations?
Yes. It's rated IP66, which means it's sealed against dust and powerful water jets, making it suitable for exposed outdoor spots like flower beds or under decking.
We offer free standard delivery on orders within the UK Mainland* (an additional fee applies for the Isle of Wight, the Isle of Man, the Scottish Isles, parts of Scotland, Northern Ireland, the Republic of Ireland, the Channel Isles and International).
*Collingwood orders under £150 incur a delivery fee of £9.95 inc. VAT.
*Any order under £49 incurs a delivery fee of £9.95.

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