Thorne & Derrick International are Specialist Suppliers to the UK and international Offshore Wind Industry of products to provide safe and reliable LV HV Electrical Cable Termination, Jointing, Installation & Power Systems up to 66kV.
We are based in North-East England, recognised as a key strategic location to service the offshore renewables energy market in the UK, from the North Sea to the Nordics – our Exports Division support international offshore wind power projects from USA to China.
Key Product Categories: Connectors, Joints & Terminations MV HV | Cable Preparation & Jointing Tools | Duct Seals | Cable Transits | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Clothing & Protection | Cable Pulling | Earthing & Lightning Protection | Feeder Pillars
Main UK Stockists for:Â 3M Electrical, PFISTERER Connex, Nexans Power Cable Accessories (Euromold), Alroc, Ellis Patents, ABB, Roxtec, Cembre & CATU Electrical.
1 Block Island Offshore Wind Farm USA | GE Renewable Energy | Thorne & Derrick, as Approved Vendors to GE Renewable Energy, supplied Earthing, Static Discharging & Electrical Safety Equipment to the substations plus a 33kV Cable Accessories package to power, joint and connect the medium voltage switchgear and transformers.
2 Operational Offshore Wind Farms (12 Locations) | Orsted | Thorne & Derrick, as Approved Vendors to Orsted, supplied both standard and customised heat shrink joints manufactured by Nexans to enable planned maintenance and repair of the ABB, NKT, TFK & Prysmian High Voltage Cables – included land and subsea cable systems operating at 33kV.
3 Multiple Offshore Wind Farm Assets | JDR Cable Systems | Thorne & Derrick, as Approved Vendors to JDR Cable Systems, developed MV Jointers Tool Kits to provide offshore wind technicians with the specialist tools needed to prepare inter array cables up to 33kV prior to the installation of joints, terminations or connectors to the highest standard – included tools to enable the removal of the cable outersheath, insulation (XLPE) and semicon screens.
The Jointers Tool Kits are designed to provide their jointers with the specialist cable tools needed to prepare inter array cables up to 33kV prior to the installation of joints, terminations or connectors to the highest standard.
4 Bespoke & Standard Cable Clamps, Saddles & Cleats | Developed client customised cable support and cleat systems for high voltage cables in the nacelle/tower of WTG’s for a world leading manufacturer of wind turbines currently under NDA.
We are also approved vendors to SSE Renewables, Swire Energy Services (ALL NRG), Vestas Wind Systems A/S, Correll Group, Van Oord, Vattenfall, Boskalis and other leading renewable energy companies throughout the world.
5 Cable Pull-in Equipment | Working with Balfour Beatty plc on the Viking Link project Thorne & Derrick supplied a range of cable drum handling, socks, rollers and lubrication products to enable the safe pulling and trenching of high voltage power cables.
Image Courtesy | Max States Site Engineer at Balfour Beatty plc (Viking Link) – here the EHV 526kV cable is pictured being pulled from a 62 tonne cable drum (1240m circuit) into the cable trench via rollers in July 2021. Viking Link is a 1,400 MW HVDC submarine power cable under construction between the United Kingdom and Denmark.
Specialist Distributors to the UK and international Offshore Wind & Renewable industry to provide safe and reliable LV HV Electrical Cable & Power Distribution Systems up to 66kV – we are highly customer responsive and absolutely committed to providing a world-class service. Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.
See how T&D support, supply and service the Renewable Energy industry.
Stockists & Suppliers | UK & International Projects
Cable Pulling Equipment | Greenlee
In 1996, Klauke the leading manufacturer of cable cutting and crimping tools expanded its electrical product portfolio with the acquisition of the Greenlee brand – with the focus on punching tools and cable management, Greenlee supports the safe and reliable installation of electrical cables and equipment to provide power distribution at LV MV HV networks.
Speedy Spinner | Cable Pulling Device
Easy Rollers | Cable Drum RollersÂ
Polyester Butler & Smart Bulter | Fibreglass Cable Pulling System
Fish Tapes | Conduit Rod TapesÂ
Cable Installation Lubricant | Electrical Cable Lubrication
Contact Thorne & Derrick for competitive prices, stock availability and technical customer support on the complete range of Greenlee products for Pulling & Laying cables.
Thorne & Derrick distribute the most extensive range of Low & High Voltage Cable Installation & Electrical Distribution Equipment to the Power Transmission & Distribution industry in the onshore and offshore wind, solar, rail, oil/gas, data centre, battery storage and utility sectors – this includes the most extensive range of Cable Pulling & Cable Laying Equipment to enable the installation of low, medium and high voltage power cables into underground trench or duct.
We service UK and international clients working on underground cables, overhead lines, substations and electrical construction at LV, 11kV/33kV and up to EHV transmission and distribution voltages.
Key Products: MV-HV Cable Joints & Terminations, Cable Cleats, Duct Seals, Cable Transits, Underground Cable Protection, Copper Earth Tapes, Cable Jointing Tools, Feeder Pillars, Cable Ducting, Earthing & Lightning Protection, Electrical Safety, Cable Glands, Arc Flash Protection & Fusegear.
Distributors for: 3M Electrical, ABB, Alroc, Band-It, Cembre, Centriforce, CMP, Elastimold, Ellis Patents, Emtelle, Furse, Greenlee, Lucy Zodion, Nexans Euromold, Pfisterer, Polypipe, ProGARM, Prysmian, and Roxtec.
Specialist Distributors | LV MV HV Jointing, Earthing, Substation & Electrical Eqpt
Pictured: Class-leading workmanship and Jointer competency demonstrated in the installation of NKT separable connectors shown here terminating medium voltage power cables at 33kV into Siemens 132-33kV 130MVA power transformer.
Project | Lucite (Billingham)
Sector | Chemical Manufacturing
Date | November 2011
Smith Brothers Ltd is a large, turnkey electrical contractor with over 20 years’ experience. Since their inception in 1999, they have worked on a vast portfolio of projects throughout the UK and overseas, both as an ICP and EPC contractor on schemes up to 132kV. Offering a range of services and can cater for everything from the delivery of a turnkey project – including design, the supply and commissioning of equipment and cabling installations from LV up to 132,000 volts (220,000V in ROI).
Cable and jointing services provided by Smith Brothers Ltd including cable management, installations and fault finding.
Services by Smith Brothers
• Cabling & Jointing
• Containerised Substations
• Extra High Voltage (EHV)
• Engineering, Procurement & Construction (EPC)
• Emergency Callouts
• Industrial, Commercial, Manufacturing
• Maintenance & New connections
• Onshore & Offshore Jointing
• Optical Fibre Installation
• Power System Design
• Switchgear & Transformers
• Testing & Commissioning
Nov 2020 | Lower Strensham – Western Power Distribution (WPD). Smith Brothers Contracting Ltd was commissioned by Next Energy to provide turnkey electrical engineering services for the development of a 125-acre solar farm in Strensham, Worcestershire.
Dec 2020 | The Grange – Western Power Distribution (WPD). Smith Brothers Contracting Ltd was commissioned by Next Energy to provide turnkey electrical engineering services for the development of a 125-acre solar farm in Strensham, Worcestershire.
Nov 2016 | Western Power Distribution (WPD) – North Steads Wind Farm – Northern Power Grid (NPG) 33kV Loop In Loop Out.
Smith Brothers was employed by I & H Browns to undertake the balance of plant electrical works of North Steads Wind Farm. This 18MW Wind Farm development consists of nine Senvion 2.05MW turbines which are connected to NPG’s 66kV network, The contract covered the following scope of works:
Design, supply, installation and commissioning of the electrical equipment within the substation building, including:
LV MV HV Jointing, Earthing, Substation & Electrical Eqpt
Thorne & Derrick distribute the most extensive range of MV HV Medium & High Voltage Cable Joints, Terminations & Connectors from manufacturers including 3M, Prysmian, Nexans Euromold, Elastimold, Pfisterer CONNEX and Shrink Polymer Systems.
Heat shrink, cold shrink, push-on and slip-over cable accessories enable the jointing, terminating and connection of 11kV-33kV and 66kV-132kV cables to oil, air or gas insulated switchgear, transformers, motors and overhead lines distributing electricity at MV HV.
MV HV High Voltage Cable Joints | Cable Terminations | Cable Connectors | Distributed from Stock | UK & Export Sales
HYSO QD from Socomore is the former PF-QD manufactured by PT Technologies Europe – HYSO QD is a quick drying residue free manual cleaning solvent for surface cleaning and degreasing in manufacture, maintenance and fabrication activities. HYSO QD removes general soils, oils, greases and combustion residues.
Features & Benefits of HYSO QD
HYSO QD is a fast evaporating and odourless solvent for zero residue cleaning and degreasing of low and high voltage switchgear. A non corrosive electrical cleaning solvent on metal such as copper, aluminium, magnesium and stainless steel – suitable for use on metal and painted switchgear surfaces. Compatible with resins, plastics and elastomeric rubbers, the low surface tension provides excellent wetting action, even with difficult plastics.
HYSO QD is suitable for a variety of LV-HV switchgear cleaning applications, in general and specific niche industries such as aerospace and power.
* Switchgear cleaning and maintenance
* Surface cleaning and preparation
* Removing petroleum based oils
* General cleaning and degreasing in manufacture, fabrication and maintenance applications
HYSO QD has additional worker benefits along with its impressive compatibility and cleaning abilities : quick drying, non toxic, has a low skin irritation potential and as it is odourless, eliminates strong smells in the workplace – especially important for those working in confined spaces on low and high voltage switchgear and cabinets.
1. Apply a thin film of cleaning solvent using the liquid or impregnated wipe.
2. Allow 1-2 minutes for surface action to dislodge switchgear contaminants.
3. Wipe off with the same wipe or with a clean, dry lint free cloth (recommended). Repeated use of the impregnated cleaning wipe without further solvent addition is possible until the cleaning wipe becomes saturated with contaminant.
See Also | PF Wipes Cable Cleaning Solvents & Products
Techlube | Market-leading Cable Pulling Lubricant
Thorne & Derrick International are the UK’s leading stockist and supplier of Cable Pulling & Cable Laying Equipment for the installation of underground land and subsea power cables and overhead lines up to 400kV – the products support cable pulling teams to install LV MV HV cables into trench, cable duct, risers and all forms of cable containment.
T&D distribute the complete range of LV-HV Cable Pulling and Laying Equipment including cable rollers, cable socks, cable jacks, cable drum trailers, cable lubricant, underground cable protection and conduit duct rod.
By Stephen Harrison | Training & Technical Manager Current Training Service Pty Ltd
The image shows a shed (rain shed) – this is a heat shrink moulded part and component of standard medium voltage cable terminations. The installed rain shed is in operation on a 33kV indoor installation – tracking and discharging can be seen on the outside of the shed (rain shed) element of the cable termination and if left unchecked this will eventually cause the MV cable to fail in the field. At 33kV (Um 36kV) this cable termination was suffering a tough time whilst in service and it was eventually pulled out of operation after the discharge was identified. The discharge and tracking can be seen between the surface of the anti-tracking tube and the shed (rain shed) collar which is due to poor installation by the cable jointer. Sheds (rain sheds) must be shrunk down with collar connecting to the anti-tracking tubes evenly. If in doubt how and where the shed (rain shed) is to be installed, refer to manufacturer’s instructions.
Thorne & Derrick | Distributors of Medium Voltage Joints, Terminations & Connectors
3M Electrical | Nexans Euromold | Pfisterer CONNEX | Main UK Stockists
Published 22 May 2026
The following article on Cable Asset Management has been published with the kind permission of ERPA. ERPA (Electric Power Reliability Alliance) are a collaborative practitioner community that works to advance awareness and understanding of electric power reliability. ERPA are...
Published 22 May 2026
Restoring transformer termination integrity with LoviSil A Modern Solution for Ageing PILC Networks UK DNO Approved For 25 Years+ When a major site recently experienced a fault on an 11kV transformer termination, the challenge was clear: restore the system...
