Junction Boxes

Junction boxes primary purpose is to connect and protect wiring that carry electrical current ensuring safe connections and security from the elements and unqualified engineers. Junction boxes are available in a variety of sizes, material types and colours. They are found in Industrial and commercial applications.

How do junction boxes work?

A junction box upon inspection offers points of entry for lighting and electrical cable, so its very important to have the correct junction box for the application. These points of entry consist of a knockout, integrated thread or self-sealing membranes.

Internally there are mounting points for screws in each corner, use the correct masonry plugs, anchors and fixings for the surface you are mounting to. Once the junction box has been mounted and all cables prepared, wire connections can be made using the correct cable terminals and splices. A sealed box lid or box cover then provides security for all the internal components.

What materials are they made from?

Junction boxes are made from various materials such as; ABS, Aluminium, Carbon Steel, Duro-plastic, Galvanised Steel, Glass Fibre Reinforced PET, GRP, Mild Steel, Nickel-Plated Steel, Plastic, Polyamide, Polybutylene Terephthalate, Polycarbonate, Polyester, Polypropylene, Polystyrene, PVC, Stainless Steel, Steel and Thermoplastic.

Where would you find junction boxes?

  • Lighting installation
  • Housing and wiring connections

Types of Junction boxes

Typical types of junction boxes include;

  • One-gang
  • Two-gang
  • Metal pancake
  • Four-square

What IP ratings are available?

IP ratings such as; IP20, IP2X, IP40, IP44, IP54, IP55, IP65, IP66, IP67 and IP68 are available

(IP) Ingress Protection and what it means

IP rating classifies the degrees of protection provided against the intrusion of solid objects (including body parts like hands and fingers), dust, accidental contact, and water in electrical enclosures.


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Description Price Length Material Width Dimensions L x W x H IP Rating Height Number of Terminals Number of Ways Colour Hazardous Area Certification Cable Entry Current Rating Diameter
RS Stock No. 776-7659
BrandRS PRO
£7.86
1 Pack of 5
Pack(s)
- - - - IP2X - 3 4 Black - Selective entry 30A 76mm
RS Stock No. 749-1857
BrandRS PRO
£76.43
Each
Units
150mm Stainless Steel 80mm 150 x 80 x 150mm IP66 150mm - - Unpainted - - - -
RS Stock No. 122-030
BrandRS PRO
£29.19
Each
Units
300mm Steel 200mm 300 x 200 x 120mm IP66 120mm - - Grey - - - -
RS Stock No. 776-7646
BrandRS PRO
£1.182
Each (In a Pack of 5)
Units
- - - - IP2X - 4 4 Black - Selective entry 5A 62mm
RS Stock No. 842-8311
BrandRS PRO
£80.87
Each
Units
300mm Stainless Steel 150mm 300 x 150 x 80mm IP66 80mm - 0 Unpainted - - - -
RS Stock No. 122-103
BrandRS PRO
£21.13
Each
Units
150mm Steel 150mm 150 x 150 x 80mm IP66 80mm - - Grey - - - -
RS Stock No. 842-8330
BrandRS PRO
£56.61
Each
Units
150mm Stainless Steel 150mm 150 x 150 x 80mm IP66 80mm - 0 Unpainted - - - -
RS Stock No. 842-8336
BrandRS PRO
£89.48
Each
Units
200mm Stainless Steel 200mm 200 x 200 x 120mm IP66 120mm - 0 Unpainted - - - -
RS Stock No. 749-1872
BrandRS PRO
£252.80
Each
Units
300mm Stainless Steel 120mm 300 x 120 x 300mm IP66 300mm - - Unpainted - - - -
RS Stock No. 776-7640
BrandRS PRO
£1.314
Each (In a Pack of 5)
Units
- - - - IP2X - 4 4 Black - Selective entry 20A 76mm
RS Stock No. 122-046
BrandRS PRO
£32.68
Each
Units
400mm Steel 200mm 400 x 200 x 120mm IP66 120mm - - Grey - - - -
RS Stock No. 749-1854
BrandRS PRO
£117.11
Each
Units
200mm Stainless Steel 120mm 200 x 120 x 200mm IP66 200mm - - Unpainted - - - -
RS Stock No. 122-068
BrandRS PRO
£41.21
Each
Units
400mm Steel 300mm 400 x 300 x 120mm IP66 120mm - - Grey - - - -
RS Stock No. 842-8308
BrandRS PRO
£22.25
Each
Units
150mm Steel 150mm 150 x 150 x 120mm IP66 120mm - 0 Grey - - - -
RS Stock No. 749-1860
BrandRS PRO
£97.53
Each
Units
150mm Stainless Steel 80mm 150 x 80 x 150mm IP66 150mm - - Unpainted - - - -
RS Stock No. 122-052
BrandRS PRO
£36.29
Each
Units
300mm Steel 300mm 300 x 300 x 120mm IP66 120mm - - Grey - - - -
RS Stock No. 749-1888
BrandRS PRO
£46.57
Each
Units
150mm Mild Steel 80mm 150 x 80 x 150mm IP66 150mm - - Grey - - - -
RS Stock No. 842-8320
BrandRS PRO
£115.74
Each
Units
300mm Stainless Steel 200mm 300 x 200 x 120mm IP66 120mm - 0 Unpainted - - - -
RS Stock No. 758-7046
BrandRS PRO
£93.70
Each
Units
300mm Stainless Steel 150mm 300 x 150 x 80mm IP66 80mm - - Unpainted - - - -
RS Stock No. 842-8318
BrandRS PRO
£98.30
Each
Units
300mm Stainless Steel 150mm 300 x 150 x 120mm IP66 120mm - 0 Unpainted - - - -
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