Thorne & Derrick’s POWER Blog is regularly updated with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.
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We focus on 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 HV
We provide guidance and technical support for the installation of LV, MV & HV Cable Joints, Terminations, Substation & Electrical Equipment from our Key Suppliers including:
| 3M | CMP | Ellis Patents |
| Nexans Euromold | Elastimold | Pfisterer |
| Prysmian | Alroc | CSD |
| Roxtec | CATU Electrical | Cembre |
| Lucy Zodion | ABB | Emtelle |
With Photo Blog contributions from our social network of utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.
JOINT ♦ TERMINATE ♦ CONNECT ♦ GLAND ♦ CLEAT ♦ CRIMP ♦ DUCT ♦ SEAL ♦ REPAIR ♦ CABLE ♦ SPLICE ♦ INSULATE
Published 23 Jul 2026
Surface tracking is an electrical insulation failure process where leakage current forms a conductive path across the surface of an insulating material. In MV and HV cable systems, surface tracking is most commonly discussed around cable terminations, where electrical stress, moisture, contamination and poor installation conditions can create a...
Published 23 Jul 2026
Trefoil cable formation is an installation method where three single core power cables are arranged together in a triangular, shamrock-style formation. Each cable normally represents one phase of a three-phase electrical circuit, and the three cables are held together using trefoil cable cleats or cable clamps. Trefoil formation is...
Published 23 Jul 2026
Earth mats, earth tape and portable earthing devices all form part of electrical earthing and safety systems, but they are not the same thing. Some are permanent components buried or fixed into an earthing system, while others are temporary safety devices used during maintenance, isolation and work on electrical...
Published 22 Jul 2026
Alroc cable jointing tools are specialist cable preparation tools used by cable jointers to strip, cut, remove, chamfer and prepare LV, MV, HV and EHV power cables before installing cable joints, terminations and connectors. In medium and high voltage cable systems, preparation accuracy is critical. Before an 11kV, 33kV,...
Published 02 Jul 2026
Marconite earthing is used to help create low resistance, stable and long-lasting earthing systems by surrounding earth electrodes with an electrically conductive concrete. Marconite is a conductive aggregate that is mixed with cement and water to form a conductive concrete around earth rods, copper earth tapes, earth mats or...
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