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Junction Boxes

Our range of Knightsbridge junction boxes covers connections for lighting, power and data wiring. Weatherproof IP68 gel boxes in three and four-way, rated 24A, suit outdoor and underground runs, with a clear 16A version and a blue 5A series-wiring box too. Resin terminal boxes come in three, four and six-terminal types from 5A to 60A in white, black and brown, plus a CAT6 box for network cable.

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What junction boxes are for

Junction boxes are enclosures that hold and protect a join in cable, covering connections for lighting, power and data wiring. They keep a connection tidy and shielded inside a case, whether the run is hidden in a wall, tucked into a loft or exposed outdoors. The right box depends on where the join sits and what it needs to stand up to.

Gel and weatherproof types

Weatherproof IP68 gel boxes are made for outdoor and underground runs, sealing the connection against moisture so it can sit below ground or on an exposed wall. They come in three and four-way versions rated at 24A, with a clear polycarbonate 16A version and a blue 5A box for series wiring. The gel fill means the join stays protected even when buried.

Resin terminal boxes

Resin terminal boxes cover indoor and protected connections, with three, four and six-terminal types from 5A up to 60A. The terminals let you land conductors securely without separate connectors,. Higher amp ratings suit power circuits, while lower ratings cover lighting and lighter loads.

Materials and finishes

Bodies are made from resin, polycarbonate or ABS depending on the type, balancing strength against where the box will sit. Finishes run across white, black, brown, blue and grey, so a surface-mounted box can be matched to nearby fittings or kept discreet against a wall.

How to choose

Start with the location. For outdoor or underground joins, choose an IP68 gel box, and for indoor or protected runs a resin terminal box. Then match the amp rating to the circuit and the terminal count to the number of conductors you need to join. Free UK delivery over £99, worldwide shipping.

Frequently Asked Questions

Which junction box should I use outdoors or underground?
The weatherproof IP68 gel boxes are made for this. The gel seals around the cable to keep moisture out, and the 24A three and four-way versions are rated for outdoor and underground use. A clear IP68 16A box is also available where you want to see the connections.

What do the terminal counts and amp ratings mean?
Terminals are the connection points inside: three-terminal boxes suit a simple junction, while four and six-terminal boxes handle more conductors. Ratings here run from 5A up to 60A, so pick a box rated for the circuit current it sits on.

Can I use one of these for network or data cable?
Yes. The CAT6 UTP junction box is made to join data cable runs and keep the connection tidy, rather than for mains wiring. The terminal and gel boxes are intended for lighting and power circuits.

Do I need an electrician to install a junction box?
A junction box that joins fixed mains wiring should be installed by a qualified electrician. The resin terminal boxes are made to be enclosed once the connections are done, so siting and access matter when you plan the run.

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