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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 CategoriesDuct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder PillarsCable 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

MV HV Cables 11kV 33kV

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.

Joints Terminations Connectors - Nexans Euromold Pfisterer 3M

JOINT ♦ TERMINATE ♦ CONNECT ♦ GLAND ♦ CLEAT ♦ CRIMP ♦ DUCT ♦ SEAL ♦ REPAIR ♦ CABLE ♦ SPLICE ♦ INSULATE


You are currently filtering by: Medium Voltage Cable Accessories - Best Practice Guide

Medium Voltage Cable Accessories – Best Practice Guide

Published 12 Jan 2020

Medium Voltage Cable Accessories – Best Practice Guide

uploaded  by Chris Dodds - Thorne & Derrick Sales | Marketing Manager This series of Blogs have been written by MV Cable Accessory Manufacturers to help promote ‘best practice’ in the installation of their products including joints, terminations and connectors for medium voltage power cable systems. It is principally...

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MV Cables | Electric Field & Stress Control

Published 10 Jan 2020

MV Cables | Electric Field & Stress Control

Electric field and stress control All cables for MV and higher voltage ratings, whether paper or polymeric insulated, have a metallic screen which is connected to earth. In addition, polymeric cables have a conductive polymeric screen as described in earlier sections. This semicon screen ensures that the electric field...

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MV Cables & Causes of MV Cable Failures

Published 10 Jan 2020

MV Cables & Causes of MV Cable Failures

      MV Cables As well as causing disruption to power supply, accessory failures are potentially dangerous especially if they occur in public areas such as under roads or walk-ways. Figure 46 shows the immediate result of electrical breakdown and arcing in a cable joint installed in a...

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MV Cable Accessory Technologies | Heat Shrink, Cold Shrink & Push-on

Published 10 Jan 2020

MV Cable Accessory Technologies | Heat Shrink, Cold Shrink & Push-on

      Installers should always receive Jointer training in the MV cable accessory technologies that they will work with. Each technology has its own peculiarities and practice will be needed for the installer to become familiar with the individual skills needed. Installation instructions always have detailed information on...

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Earth Bonding | Joints & Terminations & Overheating Prevention

Published 10 Jan 2020

Earth Bonding | Joints & Terminations & Overheating Prevention

      Earth Bonding Earth bonding across joints and at terminations does not always receive the level of care and attention that it requires. An ineffective earth bond can be just as damaging to MV cable accessory performance as inadequate phase conductor connections. It is also possible that...

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