LV Cable Joints & Terminations - Cold Shrink, Heat Shrink & Resin
Cable joints are available from stock in several technologies to suit the low voltage (LV) installation application and cable type to be repaired or jointed; this includes i) Cold Shrink ii) Heat Shrink and iii) Resin.
Thorne & Derrick supply 3M, Prysmian, Filoform and SPS low voltage cable joints suitable for connecting and jointing single and multi-core/pair power, control and instrumentation cables up to 600/1000V (3.3kV) in industrial and hazardous area locations – specialist applications include fire resistant, low smoke zero halogen, hydrocarbon resistant and utility cable joints.
Jointing kits are available for both unarmoured and armoured type cables including:
- STA | Steel Tape Armour (Multi-core)
- SWA | Steel Wire Armour (Multi-core)
- AWA | Aluminium Wire Armour (Single-core)
Jointing Cables Effectively To Eliminate Failure
Careful consideration must be given to the specification of the cable to be jointed, the installation application and environmental factors to prevent the risk of future failure when specifying LV cable joints.
XLPE, EPR and PILC insulated cables with wire armour or braid and lead sheath cover can be jointed effectively and safely in straight, branch, transition, mains and service arrangement – joints are suitable for direct burial in underground trench, seawater immersion offshore, location on cable tray (vertical/horizontal) and underground rail tunnels where zero halogen specification is required.
Hazardous area cable joints are available from stock for both onshore and offshore cables in the oil, gas and petrochemical industry – suitable for Zone 1 and Zone 2 explosive atmospheres where exposure to corrosive and flammable gases, vapours or mists would cause the degradation and premature failure of standard cable joints.
Pictured opposite is a heat shrink cable joint failure caused by the jointer not providing adequate connection of the earth continuity across a jointed shipwiring braided type cable. Consequently, hydrocarbons contaminated the cable via a pathway along the wire armours and eroded the cable sheath.
LV Cable Joints
Cold shrink, heat shrink and resin type cable joints suit the operating requirements for the jointing of LV cables in industrial, marine and offshore, oil and gas, substation and utilities, rail and electrical construction sectors where high quality and performance joints ensure the continued distribution of power supply to critical circuits.
Contact Thorne & Derrick to discuss your application – we can provide expert technical support and specification advice to ensure the correct supply of electrical LV cable joints to suit your requirement.
Specialist Cable Joints
To meet the performance and specification requirements for planned maintenance, project installations and fault repair work, T&D can deliver from stock LV cable joints to suit:
- Fire Resistant & FP Fire Performance Cables – Fire Alarm, Emergency Lighting & Power BS7846
- Low Smoke Zero Halogen Cables – LSZH, LSF, OHLS & ZHLS
- Flexible & Trailing Cables – Protolon, Panzerflex & Mining
- Utility Cables – Waveform, Mains & Service
- Marine & Offshore Cables – BFOU RFOU IEC NEK606 (Mud Resistant)
- Medium & High Voltage MV HV Cable Joints
Zero Halogen Heat Shrink Joints
In this training video excerpt the Jointer Trainer is shown using a gas torch to heat shrink tubes onto the cable cores and conductors of a rail power cable to complete a zero halogen cable joint. The cable joints utilise specialist zero halogen tubing with a low emission of toxic and corrosive gases approved by London Underground and Network Rail to establish cable joints in subsurface applications, such as tunnels.
The XLPE cable insulation has been stripped from the cable conductors and the cores cropped using ratchet cable cutters. Connectors have been installed using hydraulic crimping tools – note the connector heat shrink insulation tubes are positioned centrally over the compression ferrules within the cable joint, where confined space is a limiting factor the cable connectors can be staggered to provide a more smooth profile joint to reduce footprint of the jointing kit.
3M Network Rail Cold Shrink Joints for Track Feeder Cables
3M Cold Shrink Network Rail cable joints are used for the cable jointing and cable terminating of track feeder cables. 3M Cold Shrink cable joints require no hot-work permit or special tools for installation.
Track feeder cable joints are approved for cable jointing Network Rail NR/PS/ELP/21101, BS6360 and BS6899 specification single core copper and aluminium cables, 650/750 DC supply.
CSP sheathed track feeder cables provide power supply from the substation to the rail track side.
3M Cold Shrink Cable Sealing Tubes are specified for rail cable sealing, insulation and protection and are approved by Network Rail for live rail terminations and inline cable joints for DC track feeder cable applications.
3M Cold Shrink provides a permanent radial seal, expanding and contracting with the rail cable under load conditions. 3M Cold Shrink Tubes are made from EPDM rubber, expanded onto a removable supporting plastic core.
As the core is unwound, the 3M Cold Shrink insulating sleeve shrinks to form a tight seal around the cable terminal or splice.
3M LA11 and 3M LO42 form part of the 3M Electrical range of EPDM Cold Shrink tube ranges with LUL TfL Approval – for fire resistance and conformance to S1085 Standard the tube should be covered and over-protected using 3M STFF product.
|Cable Joint/Termination Application||Cable Joint Kit||Min Diameter||Max Diameter||Cold Shrink Length|
|500/630/1000mm² 3rd Rail Terminations||LO41||24.4||98.2||228mm|
|161/1240mm² Inline Joints or Terminations||LO42||15.2||61||191mm|
|500/630/800/1000 Inline Joint||LA11||38.1||114||457mm|
➡ View the complete range of LV Cable Joints.
Cable Joints ♦ LV Voltage Cables ♦ Cold Shrink ♦ Heat Shrink ♦ Resin Cast ♦ Hazardous Area ATEX ♦ Fire Resistant ♦ Zero Halogen