3M LC7 Cold Shrink Cable Joint
3M LC7 Cold Shrink Cable Joint 4 Core 240sqmm-300sqmm XLPE EPR Cables
3M LC7
3M LC7 cable joint uses Cold Shrink technology for repairing, splicing and jointing polymeric (XLPE EPR) cables eliminating resin handling or exposure to naked flames associated with heat-shrink joints.
Selection guide for jointing multicore power cables using 3M LC7 joint kit:
- Single Core 1kV – NA
- 2 Core 1kV – NA
- 3 Core 1kV 300sqmm
- 4 Core 1kV 240-300sqmm
- 3 Core 3.3kV – 300sqmm
- 3M LC1 Cable Joint Diameter Range 62.5-128.5mm
Cold Shrink tubes are quick, easy and safe to install providing a reliable cable joint and environmental seal resistant to acid, alkalis, ozone and UV light.
With smooth profile, minimal space displacement and lightweight design the cable joints are suitable for installation in cable congested and confined areas, such as cable trays.
For direct burial of 3M LC7 cable joints additional underground mechanical protection could be required.
LC7 cold shrink cable joint kit, manufactured by 3M Electrical, is designed for use on XLPE/PVC/EPR, insulation, Lead Sheath, Steel Wire Armoured (SWA), Galvanised Steel Wire Braided (GSBW) and PVC Sheathed cables up to 3.3kV – complete range of Cold Shrink terminations available for connection of LV power cables 600/1000v / 3.3kV.
Each 3M LC7 cold shrink joint kit comprises of outer protection tube, copper braid stocking, constant force springs, Scotch 2228 mastic tape and Scotch 23 self-amalgamating tape.
Blog ➡ Watch, Listen & Learn about the benefit of Cold Shrink tubes
T&D stock a full range of cold shrink cable joints including 3M LC7 available ex stock, contact us for price delivery or to place an order.
3M Cold Shrink Cable Joints
Multicore Cable Joint
To cable joint multi-core power cables:
- Single Core 1kV – N/A
- Two Core 1kV – N/A
- Three Core 1kV – 300sqmm
- Four Core 1kV – 240 – 300sqmm
- Three Core 3.3kV – 300sqmm
- Cable Diameter Range – 62.5mm – 128.5mm
3M lc7 Cold Shrink Cable Joint Kit List
- Cold Shrink Pre-Stretched Outer Tube
- Self Amalgamating Insulation Tape
- Armour/Earth Connection
- Cable Jointing Installation Instructions
CABLE Jointing Wire Armoured Or Braided Cables
3M LC7 cable joint can be used joint XLPE steel wire armoured (SWA) or EPR galvanised steel wire braided (GSWB) cables – the armour continuity is provided by a copper wire stocking attached to the cable armour using 3M constant force springs for cable diameters 44-70mm.
Hazardous Areas
Without the requirement to provide a heat source, such as a Jointers gas torch with naked flames as required to install heat shrink cable joints, the LC7 kit is safe and cold-applied for use in potentially explosive atmospheres and hazardous area locations. Where advanced and proven resistance to hydrocarbons is required, typically Zone 1 & Zone 2 locations according to the ATEX Directive, see the 3M Scotchcast Resin range of hazardous area cable joints.
| 3M Cold Shrink Cable Joint Part Number | Cross Sectional Area (mm²) | Cable Diameter Range (mm) | Cable Armour Range (mm) | ||||
| Single Core 1kV | Two Core 1kV | Three Core 1kV | Four Core 1kV | Three Core 3.3kV | |||
| LC1 | N/A | 1.5 – 4 | 1.5 – 4 | 1.5 – 2.5 | N/A | 16.1 – 33.1 | 9 – 15 |
| LC2 | 50 – 95 | 6 – 10 | 6 – 10 | 4 – 6 | N/A | 16.1 – 33.1 | 14 – 22 |
| LC3 | 120 – 150 | 16 – 50 | 16 – 25 | 10 – 16 | N/A | 16.1 – 33.1 | 18.5 – 29 |
| LC4 | 185 – 400 | 70 – 120 | 35 – 70 | 25 – 50 | 16 – 50 | 24.9 – 56.4 | 23.5 – 37 |
| LC5 | 500 – 630 | 150 -185 | 95 – 150 | 70 – 120 | 70 – 150 | 37.8 – 84.3 | 31 – 50 |
| LC6 | 800 – 1000 | 240 – 300 | 185 – 240 | 150 -185 | 185 – 240 | 37.8 – 84.3 | 44 – 70 |
| LC7 | N/A | N/A | 300 | 240 – 300 | 300 | 62.5 – 128.5 | 44 – 70 |
The following 3M Electrical video demonstrates the procedure for installing 3M LC7 Cold Shrink joints – for further information or to discuss a particular jointing application please do not hesitate to contact us.
➡ For jointing medium and high voltage power cables, please see 11kV-33kV-66kV Cold Shrink Joints in the MV-HV section of our website.
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