Junction Boxes

What are junction boxes used for?

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 Width Height Material Dimensions L x W x H IP Rating Number of Terminals Number of Ways Colour Hazardous Area Certification Cable Entry Current Rating Diameter Series
RS Stock No. 455-706
Mfr. Part No.12812 M128120020
BrandABB
SGD54.12
Each
units
- 275mm 220mm - - IP65 - - - - - - - -
RS Stock No. 365-9273
Mfr. Part No.81091001
BrandSpelsberg
SGD45.745
Each (In a Pack of 2)
units
140mm 140mm 79mm Polystyrene 140 x 140 x 79mm IP65 - 12 Grey - - - - -
RS Stock No. 905-4396
Mfr. Part No.CEP121290PA
BrandCE-TEK
SGD152.52
Each
units
122mm 120mm 90mm Polyester 122 x 120 x 90mm IP66 10 4 Black ATEX M20 - - -
RS Stock No. 454-955
Mfr. Part No.00846 M008460000
BrandABB
SGD7.34
Each
units
100mm 100mm 50mm Thermoplastic 100 x 100x 50mm IP65 - - Grey - - - - -
RS Stock No. 700-0798
Mfr. Part No.61779
BrandWISKA
SGD15.307
Each (In a Pack of 3)
units
110mm 110mm 66mm Polypropylene 110 x 110 x 66mm IP66, IP67 - 10 Black - - - - -
RS Stock No. 699-7118
Mfr. Part No.WPJB
BrandRagni
SGD16.83
Each
units
62mm 110mm 110mm - 62 x 110 x 110mm IP66 5 5 - - M20 Knock out - - -
RS Stock No. 455-071
Mfr. Part No.1SL0856A00 1SL0856A00
BrandABB
SGD52.90
Each
units
220mm 170mm 80mm Thermoplastic 200 x 170 x 80mm IP65 - - Grey - - - - -
RS Stock No. 229-0744
Mfr. Part No.16122209.8
BrandRose
SGD352.19
Each
units
91mm 120mm 90mm Glass Fibre Reinforced PET 220 x 120 x 90mm IP66 20 2 Black ATEX - - - -
RS Stock No. 730-385
Mfr. Part No.GB 255 - 730385
BrandBartec
SGD537.69
Each
units
255mm 250mm 120mm Glass Fibre Reinforced PET 255 x 250 x 120mm IP66 20 8 Black ATEX - 11.5A - -
RS Stock No. 455-716
Mfr. Part No.12814 M128140020
BrandABB
SGD109.06
Each
units
- 275mm 370mm - - IP65 - - - - - - - -
RS Stock No. 229-0700
Mfr. Part No.16880200.8
BrandRose
SGD123.28
Each
units
121mm 121mm 75mm Glass Fibre Reinforced PET 121 x 121 x 75mm IP66 6 2 Black ATEX - - - -
RS Stock No. 151-612
Mfr. Part No.ENN05002
SGD6.772
Each (In a Pack of 5)
units
65mm 45mm 65mm ABS 88 x 88 x 45mm IP55 - 4 Grey - - - - -
RS Stock No. 730-379
Mfr. Part No.GB 160 - 730379
BrandBartec
SGD315.20
Each
units
160mm 160mm 90mm Glass Fibre Reinforced PET 160 x 160 x 90mm IP66 15 6 Black ATEX - 15A - -
RS Stock No. 730-363
Mfr. Part No.GB 122 - 730363
BrandBartec
SGD239.29
Each
units
122mm 120mm 90mm Glass Fibre Reinforced PET 122 x 120 x 90mm IP66 10 6 Black ATEX - 15A - -
RS Stock No. 499-5974
Mfr. Part No.KL1503510
BrandRittal
SGD64.08
Each
units
- 300mm 200mm Steel - IP66 - - Grey - - - - -
RS Stock No. 700-0802
Mfr. Part No.COMBI 308/5
BrandWISKA
SGD12.296
Each (In a Pack of 5)
units
85mm 85mm 51mm Polypropylene 85 x 85 x 51mm IP66 - 8 Grey - - - - -
RS Stock No. 266-3136
Mfr. Part No.38102400
BrandBopla
SGD41.13
Each
units
98mm 64mm 34mm Polyamide 98 x 94 x 34mm IP65 - 4 Grey Silver - - - - -
RS Stock No. 504-4544
Mfr. Part No.235472
BrandBartec
SGD305.67
Each
units
160mm 160mm 90mm Glass Fibre Reinforced PET 160 x 160 x 90mm IP66 15 - - ATEX - 21A - -
RS Stock No. 508-6419
Mfr. Part No.870-910/21
BrandSpelsberg
SGD170.90
Each
units
450mm 300mm 132mm Plastic 450 x 300 x 132mm IP54 / 65 - 4 - - - - - -
RS Stock No. 455-700
Mfr. Part No.12816 M128160020
BrandABB
SGD95.72
Each
units
- 275mm 570mm - - IP65 - - - - - - - -