Cable Terminations | Heat Shrink | Cold Shrink | Push-On | MV HV Medium & High Voltage
Nexans GTS1 type MV cable joints are straight heat shrink joints for jointing single core polymeric insulated medium voltage cables with extruded easy strip conductive screen or bonded extruded conductive screen. Nexans GTS1 heat shrink cable joints are fully screened, submersible and can be directly buried into cable trench.
Nexans cable joints are available in both heat shrink and cold shrink technologies for jointing and repairing medium/high voltage cables up to 33kV – single core and 3 core cable joints kits are available for MV-HV cables with paper or polymeric insulation, copper wire or copper screen and armoured/unarmoured construction. The cable joints accommodate both shearbolt cable connectors or crimp connectors.
The installation Cable Jointing Video focuses on ➡
The following table enables the selection of Nexans GTS1 heat shrink cable joints for 11kV, 24kV, 33kV and 42kV voltage cables:
| Straight Cable Joint Type | Voltage Um kV | Cable Joint Length “L” (mm) | Conductor Sizes | |
| Min | Max | |||
| Nexans 17GTS1 | 6/10kV | 750-1000mm | 25sqmm | 1000sqmm |
| Nexans 24GTS1 | 12/20kV | 1000mm | 35sqmm | 1000sqmm (1,200sqmm on request) |
| Nexans 36GTS1 | 18/30kV | 1000mm | 50sqmm | 1000sqmm (1,200sqmm on request) |
| Nexans 42GTS1 | 20.8/36kV | 1000-1200mm | 50mm | 1000mm |
➡ More Cable Jointing Videos | Heat Shrink Terminations | Heat Shrink Joints Transition | Separable Connectors | Cold Shrink Joints | Cold Shrink Terminations
THORNE & DERRICK Product Categories: Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HVÂ
The Euromold range of Separable Connectors are suitable for the termination of power cables onto all MV-HV bushing interfaces:
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View the complete range of Nexans Terminations | Joints | Connectors
Cable Terminations | Heat Shrink | Cold Shrink | Push-On | MV HV Medium & High Voltage
Nexans GTM3.1 type MV cable joints are transition cable joints using heat shrink technology for jointing three core paper cables (PILC draining and non-draining) to three core polymeric cables (XLPE). Nexan’s GTM3.1 heat shrink cable joints are designed for use with paper insulated belted or screened cables with a common lead sheath and are fully screened, submersible and can be directly buried into cable trench.
Nexans cable joints are available in both heat shrink and cold shrink technologies for jointing and repairing medium/high voltage cables up to 33kV – single core and 3 core cable joints kits are available for MV-HV cables with paper or polymeric insulation, copper wire or copper screen and armoured/unarmoured construction. The cable joints accommodate both shearbolt cable connectors or crimp connectors.
âž¡ Paper Cables (eg PILC) + Polymeric Cables (eg XLPE) = Transition Cable Joint
High Voltage Cable Preparation
Essential to the safe and reliable performance of all MV HV Joints & Terminations is the standard of cable preparation achieved by the Jointer. Pictured here is an example of excellent workmanship where the XLPE and PILC cables are stripped and prepared ready for transition jointing in the cable trench.
Image: Dave Boyd – EHV Cable Jointer. Owner/Company Director of HVÂ Cablepower Pty Ltd.
Transition Cable Joint
The installation Cable Jointing Video focuses on ➡
The following table enables the selection of Nexans GTM3.1 heat shrink cable joints for 11kV, 24kV and 33kV voltage cables:
| Transition Heat Cable Joint | Voltage Um kV | Transition Cable Joint Length “L” (mm) | Conductor Sizes | |
| Min | Max | |||
| Nexans 17GTM3.1 | 11-12-17.5kV | 1800 | 25sqmm | 400sqmm |
| Nexans 24GTM3.1 | 24kV | 1800 | 25sqmm | 400sqmm |
| Nexans 36GTM3.1 | 33-36kV | 1800-2300 | 35sqmm | 400sqmm |
➡ More Cable Jointing Videos | Heat Shrink Terminations | Heat Shrink Joints Straight | Separable Connectors | Cold Shrink Joints | Cold Shrink Terminations
THORNE & DERRICK Product Categories: Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HVÂ
The Euromold range of Separable Connectors are suitable for the termination of power cables onto all MV-HV bushing interfaces:
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View the complete range of Nexans Terminations | Joints | Connectors
by Chris Dodds T&D - estimated reading time 5 minutes
Ormazabal are leading manufacturers of Medium Voltage Switchgear & Electrical Distribution Products – this includes:
The following post shows the range of Euromold Connectors which are suitable for and manufacturer approved for use with Ormazabal medium/high voltage equipment bushings according to IEC 50181. BS EN 50181:2010 is the industry standard for plug-in type bushings above 1kV up to 52kV and from 250A to 2,50kA for MV-HV switchgear and transformers.
EN 50181 IEC Bushing Types
Ormazabal recommends the use of Euromold connectors for the termination of MV-HV cables as they have been tested in the Ormazabal CGMCOSMOS system cubicles.
CGMCOSMOS is part of the Ormazabal Medium Voltage Switchgear Secondary Distribution range – a fully gas-insulated modular and compact (RMU) system up to 24kV.
3 different types of EN 50181 (IEC) bushing types that are manufactured in epoxy resin and conform to the dielectric and partial tests.
• Plug-in Bushing up to 250 A
• Plug-in Bushing up to 400 A
• Screw-in Bushing up to 630 A
MV-HV bushings are located in the cable compartment or can also be placed on the side of the cubicles for direct supply to the main busbar via plug-in or screw-in connectors rated current greater than 400A or short-circuit current equal to or higher than 16kA.
250AÂ plug-in cable connectors (straight or elbow type for rear exit of cable) in outputs to transformer (cable compartment) for fuse protection functions and shielded connectors for circuit-breaker protection functions.
Cross Section of Euromold Cable Connector
| MV HV Cable Type | Cable Connector Type | 12kV Connector Type | 12kV Cross Section mm² | 24kV Connector Type | 24kV Cross Section mm² |
| Dry Cable | Elbow Connectors | Euromold 158LR | 16 – 150 | Euromold K-158LR | 16-150 |
| Dry Cable | Straight Connectors | Euromold 152SR | 16 – 150 | Euromold K-152SR | 25-120 |
| MV HV Cable Type | Shielded/Unshielded | Current Rated [A] |
12kV Connector Type | 12kV Cross Section mm² | 24kV Connector Type | 24kV Cross Section mm² |
| Dry Cable | Shielded | 400A | Euromold 400LR | 70-300 | Euromold K-400LR | 25-300 |
| 400A | Euromold 400TE | 70-300 | Euromold K-400TE | 25-300 | ||
| 630A | Euromold 450SR | 70-300 | Euromold K-450SR | 25-300 | ||
| 630A | Euromold 400LB | 50-300 | Euromold K-400LB | 50-300 | ||
| 630A | Euromold 400TB | 70-300 | Euromold K-400TB | 35-300 | ||
| 630A | Euromold 440TB | 185-630 | Euromold K-440TB | 185-630 | ||
| Unshielded | 630A | Euromold 15TS | 35-630 | Euromold UC412L | 50-240 | |
| Cable With Paper Insulation Oil Impregnated |
Shielded | 630A | Euromold K-400TB-MInD | 25-240 | Euromold K-400TB-MInD | 25-240 |
Euromold K158LR Connector – Elbow Plug-in Terminal
Euromold K152SR Connector – Straight Plug-in Terminal
Euromold K400TB Connector – Screw-in T-Terminal
| Euromold Accessory Description | Up to 24kV |
| Plug-in shunt in T | 250A |
| Plug-in shunt in cross formation | 250A |
| Insulating plugs | 250A |
| Reducers | 250A |
| Connection terminals | 250A |
| Surge arresters | 5kA |
 ➡ More Reading: Euromold 400LR 33kV Connections Into Ormazabal MV Switchgear
âž¡ View the complete range and specifications of electrical equipment bushings for medium/high voltage switchgear and transformers.
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11kV 33kV Terminations
T&D are Main UK Distributors for Nexans Power Cable Accessories – this includes heat shrink and cold shrink cable joints and terminations and the Euromold range of screened separable connectors extensively installed to terminate MV-HV power cables.
T&D Product Categories:Â Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars |Â Cable Joints LV | Joints & Terminations MV HVÂ
Thorne & Derrick distribute Nexans Cable Terminations for medium and high voltage electrical cable systems, 11kV/33kV – we provide competitive prices for both heat shrink and cold shrink terminations from extensive stocks to UK and international destinations.
Nexans cable terminations are used for connecting 11kV/33kV power cables into MV-HV electrical equipment including switchgear, transformers and substations – heat shrink terminations are available for both single and 3 core polymeric (XLPE EPR) cables.
âž¡ Read how Thorne & Derrick are now UK Main Distributors for Nexans Power Accessories.
LV – Low Voltage Cable Joints, Glands, Cleats, Lugs & Accessories (1000 Volts)
MV HV – Medium & High Voltage Cable Joints, Terminations & Connectors (11kV 33kV EHV)
Cable Laying – Underground Cable Covers, Ducting, Seals & Cable Pulling Equipment
T&D’s Power Blog covers: LV MV HV & EHV Transmission & Distribution, Substations, Switchgear, Cable Jointing & Termination, Cable Fault & Repair, Underground Cables.
âž¡ Visit Power Blog.
A series of How-To videos for repairing, jointing and terminating cables using 3M Cold Shrink & Scotchcast products.
This video by 3M Electrical shows in what situations you would require a hazardous area joint such as 3M Scotchcast LVI/3 for jointing power cables in Zone 1 and Zone 2 hazardous areas and
potentially explosive atmospheres according to the ATEX Directive.
3M LVI-3/x hazardous area resin cable joint kits are designed to be used for multi-core, armoured polymeric insulated, low voltage energy cables.
The 3M video explains how hazardous area cable joints are designed for applications where the cable joints must be flame retardant, halogen free and hydro carbon resistant.
3M have been supplying cable accessories and electrical insulating Scotchast resins for use in hazardous areas for more than 25 years and have carried out extensive research into the effects of hydrocarbons in chemical solvents and resin encapsulants.
3M products have been successfully installed in areas such as mines and quarries, underground applications, petrochemical sites and offshore areas where there is a risk of flame or explosion due to the atmospheric presence of flammable gases.
A specialised joint shell which is flame retardant, hydro carbon resistant and halogen free is filled with a 3M 1402FR resin which has been highly modified by the inclusion of various chemical additives. These additives make the resin flame retardant, halogen free and virtually unaffected by immersion and hydro carbons or chemical solvents.
➡ For further information read: ATEX Cable Joints – Jointing Cables In Hazardous Areas Zone 1 & Zone 2
Cold Shrink – invented by 3M over 40 years ago and now the preferred technology for heat-free jointing, terminating, sealing and abandonment of LV HV cables
We hope you find this video informative and educational, contact T&D for technical support, quotations and stock availability for 3M Hazardous Area Cable Joints.
| Conductor CSA (mm2) | 3M LVI-3 Scotchcast Resin Kit Reference For Jointing Power Cables In Hazardous Areas | |||||
| 1 Core 1kV | 2 Core 1kV | 3 Core 1kV | 4 Core 1kV | 1 Core 3.3kV | 3 Core 3.3kV | |
| Â 1.5 | Â – | LVI-3/2 | LVI-3/2 | LVI-3/2 | – | – |
| Â 2.5 | Â – | LVI-3/2 | LVI-3/2 | LVI-3/2 | – | – |
| Â 4 | Â – | LVI-3/2 | LVI-3/2 | LVI-3/2 | – | – |
| Â 6 | Â – | LVI-3/2 | LVI-3/2 | LVI-3/2 | – | – |
| Â 10 | Â – | LVI-3/3 | LVI-3/3 | LVI-3/3 | – | – |
| Â 16 | Â – | LVI-3/3 | LVI-3/3 | LVI-3/3 | – | LVI-3/4 |
| Â 25 | Â – | LVI-3/3 | LVI-3/4 | LVI-3/4 | – | LVI-3/4 |
| Â 35 | Â – | LVI-3/4 | LVI-3/4 | LVI-3/4 | – | LVI-3/4 |
| Â 50 | LVI-3/2 | LVI-3/4 | LVI-3/4 | LVI-3/5 | LVI-3/3 | LVI-3/5 |
| Â 70 | LVI-3/3 | LVI-3/4 | LVI-3/5 | LVI-3/5 | LVI-3/3 | LVI-3/5 |
| Â 95 | LVI-3/3 | LVI-3/5 | LVI-3/5 | LVI-3/6 | LVI-3/3 | LVI-3/6 |
| Â 120 | LVI-3/4 | LVI-3/5 | LVI-3/6 | LVI-3/7 | LVI-3/4 | LVI-3/6 |
| 150 | LVI-3/4 | LVI-3/6 | LVI-3/7 | LVI-3/7 | LVI-3/4 | LVI-3/6 |
| 185 | LVI-3/4 | LVI-3/6 | LVI-3/7 | LVI-3/7 | LVI-3/4 | LVI-3/7 |
| 240 | LVI-3/5 | LVI-3/7 | LVI-3/7 | LVI-3/8 | LVI-3/5 | LVI-3/7 |
| 300 | LVI-3/5 | LVI-3/7 | LVI-3/7 | LVI-3/8 | LVI-3/5 | LVI-3/8 |
| 400 | LVI-3/5 | LVI-3/7 | LVI-3/8 | – | LVI-3/5 | LVI-3/8 |
| 500 | LVI-3/5 | – | – | – | LVI-3/5 | – |
| 630 | LVI-3/6 | – | – | – | LVI-3/6 | – |
| 800 | LVI-3/6 | – | – | – | LVI-3/6 | – |
| 1000 | LVI-3/7 | – | – | – | LVI-3/7 | – |
3M LVI-3 Scotchcast resin cable joints are tested according to EN50393.
| Type of Test According To EN50393 Table 3 / I / A1 | Results |
| AC Voltage Withstand Test In Air 4kV AC / 1 min | Passed |
| Insulation Resistance Test In Air 1kV DC | > 10,000MΩ |
| Heat Cycle In Air 63 Cycles: 5h/3h | Passed |
| Heat Cycle In Water 63 Cycles: 5h/3h | Passed |
| AC Voltage Withstand Test In Water 4kV AC / 1 min | Passed |
| Insulation Resistance Test In Water 1kV DC | > 10,000MΩ |
âž¡ Visit 3M Electrical for further information about joints, terminations, tapes and insulation to seal, repair, splice and connect LV MV HV cables.
Cold Shrink | Joint | Terminate | Seal | Repair | Splice | LV MV HV Cables | 3M
Euromold | 66kV Joints Connectors Terminations Surge Arresters
Thorne & Derrick are leading specialist distributors of MV HV Joints, Terminations & Connectors for use on 11kV/33kV/66kV cable networks – sadly cable failures are increasingly common on onshore and offshore medium/high voltage cable networks.
A toxic cocktail of unskilled labour which is untrained in both basic cable preparation and tool use is usually the cause – this lethal combination unleashes devastation on clients assets nevermind the incalculable cost of downtime associated with power outages.
This investigation and report explains the causes into why the below 66kV cable joints failed by dissecting the cable joints one by one and recording findings to what could have caused the cable failings.
Specialist cable jointing tools to effectively prepare and remove semicon screens on 11kV/33kV and 66kV power cables should always be used by jointers – cable jointers should be trained and competent to install manufacturers products.
The cable joint failure was caused by the poor removal of the semi-conductive and the very bad XLPE insulation preparation. Deep and dirty cuts and burrs can seen in the insulation causing the XLPE insulation to be over stressed and this was what ultimately caused the insulation failure.
All HV cable joints and accessories should only be installed by trained professionals with all the correct accreditation. Any other terminations that have been installed by the above ‘jointer’ should be checked and replaced immediately.
3M pioneered the development of Cold Shrink technology for use as a material for the jointing, termination and connection of medium/high voltage cables. Since then cold shrink has been adopted by global utilities as a user-friendly and reliable MV-HV cable accessory range with high performance, stable life cycle and minimal joint or termination failure rates.
Should you require any support with the specification or supply of MV HV joints, terminations or connectors for use on 11kV/33kV/66kV energy networks please do not hesitate to contact us.
Cold Shrink Reliability Low Failure Rates
0.067% Cold Shrink Cable Joints/Splices
0.022% Cold Shrink Cable Terminations
*Data based upon U.S. failure data of U.S. manufactured 3M Cold Shrink Medium & High Voltage Cable Accessories between 2009 and 2012.
THORNE & DERRICK are national distributors LV, MV & HV Cable Installation, Jointing, Substation Earthing & Electrical Equipment – we service UK and global businesses involved in cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.
Since 1985, T&D have established an international reputation based on SERVICE | INTEGRITY | TRUST.
Contact us for 3M Electrical, ABB, Alroc, AN Wallis, CATU Electrical, Cembre, Centriforce, CMP, CSD, Elastimold, Ellis Patents, Emtelle, Euromold, Filoform , Furse, Lucy Electric & Zodion, Nexans, Pfisterer, Polypipe, Prysmian, Roxtec, Sicame, WT Henley.
Thorne & Derrick invite you to join LinkedIn’s largest LV-HV Electrical Discussion Group : Low & High Voltage Power, Cabling, Jointing & Electricals. Discussion subjects include cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV. Network, engage and promote your profile, company or products with over 10,000 influencers.
Published 02 Sep 2026
Celebrating Charlie & Ella’s Level 4 Sales Executive Apprenticeships At Thorne & Derrick International, we are proud to champion talent development and recognise the dedication required to achieve professional growth. We are therefore delighted to congratulate Charlie Baines and...
Published 11 Aug 2026
Thorne & Derrick will be Exhibiting at Solar & Storage Live UK 2026 at the NEC Birmingham from 22nd–24th September, showcasing our support for HV Cable Accessories, Joints, Terminations, Separable Connectors, Cable Tooling and Grid Connection Products used across...
