Image Courtesy of: Dan Chessher at Energi Cable Services
The trailer mounted degasifier trailer prepares oil for use in extra high voltage cables and circuits – the compact unit makes it easier to access remote and difficult locations that standard oil lorries and trucks struggle to reach or need temporary roads built to get to the worksite.
The pictured degasifier trailer was custom manufactured to a client specification by ECS.
Subscribe now to our POWER NEWSLETTER– a monthly email circulation packed with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.
Includes access to our popular JOINTERS BLOG with contributions from utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.
15,000+ Subscribers. ➡ 
Image Courtesy of: Sam Rowe – Estimator at F B Taylor (Cable Contractors) Ltd
Subscribe now to our POWER NEWSLETTER– a monthly email circulation packed with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.
Includes access to our popular JOINTERS BLOG with contributions from utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.
15,000+ Subscribers. âž¡
by Chris Dodds T&D - estimated reading time 3 minutes
Thorne & Derrick | Approved Suppliers Distributors
Ensto Utility Networks offer comprehensive solutions for overhead and underground distribution of electricity and are built to withstand the toughest conditions on earth. Durable products mean uninterrupted service, lower maintenance costs and, above all, satisfied customers.
ENSTO Low Voltage Overhead Line Equipment
Ensto offers accessories and solutions for low voltage overhead lines focused on Aerial Bundled Cable Systems, medium voltage overhead lines (for bare and covered conductor lines), low and medium voltage underground cable networks, power quality and network automation including:
Ensto’s Four Core system has four insulated conductors constructed from aluminium that share the tensile load equally and have a size range of 16-185sqmm. Insulation of the cores is typically made of XLPE or PE and the cable can be supplied with one or two insulated conductors for street lighting.
An insulated messenger wire cable (IMWS) consists of one to five black, weather resistant, high density or cross-linked, polyethylene insulated conductors twisted around an insulated aluminum alloy messenger (typical tensile strength 300 N/sqmm)
The uninsulated messenger wire system (AMKA) is a reliable, safe and easy way to build a low voltage overhead line system. Because of the small amount of components and short poles it is easy to build and preferred by many professionals.
THORNE & DERRICK are national distributors LV, MV & HV Cable Installation, Jointing, Substation & 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.
Image Courtesy of: David Young – HV / EHV Cable Jointer / Company Director at CRS (Cable Repair Services) Ltd
Pictured: 275kV Fluid Filled Straight Cable Joints
Subscribe now to our POWER NEWSLETTER– a monthly email circulation packed with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.
Includes access to our popular JOINTERS BLOG with contributions from utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.
15,000+ Subscribers. âž¡
Earthing Studies for Power Systems | Avoiding Step & Touch Potentials
Guest Blog Courtesy of Covol - thanks to Paul Callaghan for allowing T&D to republish.
Experts in Engineering Compliance for Industries in Electrical, Control and Instrumentation Services
Visit Covol
Earthing of electrical systems has been around almost as long as the electrical system itself.
While there are still some specialised electrical systems out there that don’t need to be earthed as part of their design and operation, the vast majority of the ones we deal with do!
Quite simply, Earthing Systems exist to safeguard us against electrical shock. Electrical shock incidents can result in harm to a person with various degrees of consequence ranging from burns to death.
There are different codes of practice regarding earthing that depends on where you are in the world. Consequently, they all approach this subject in different ways through national regulations and standards. However, they all share the aim to achieve specific common objectives: the most important of which being safety to personnel.
When an electrical fault occurs, the short circuit energy must be dissipated as safely and as quickly as possible for the protection system to interrupt the current flow. Typically, the short-circuit current flows to earth rods and disappears into the Earth, causing a potential rise in hazardous conditions in and around the area of the earth rods.
The difference in the surface potential experienced by a person bridging a distance with their feet apart without contacting any other grounded object is often referred to as Step Voltage Potential. You could be at risk of injury during a fault simply by standing near the grounding point.
The potential difference between the ground potential rise and the device surface potential at the point where a person is standing while in contact with the faulted structure is often referred to as Touch Voltage Potential.
There are a variety of causes that lead to high Step and Touch potentials. An excellent earthing design and its continued upkeep is essential to avoid electric shock events. A well designed earthing system considers all possible causes to provide an effective means of dissipating the fault current into the earth without exceeding the safety boundaries or adversely affecting continuity of service. It provides a safe environment to protect personnel in the vicinity of those grounded facilities from dangers of electric shock under the fault condition.
You should understand what earthing arrangements are in place, which should be documented, reviewed and tested and above all, you need to be clear that any mitigation you have in place is sufficient. If you don’t, then seeking the advice and support from a professional electrical engineering company would be a great place to start.
Above all, always remember that the earthing of electrical systems serves an invaluable purpose to keep both people and equipment safe.
At Covol, we undertake studies to determine the overall effectiveness of the various earthing systems in order to satisfy the requirements of the HSE.
These cover the following areas:
For the original blog article click here.
Thorne & Derrick are national distributors of LV, MV & HV Cable Installation, Jointing, Substation & Electrical Equipment – servicing businesses involved in cabling, jointing, substation, earthing, overhead line and electrical construction at LV, 11kV, 33kV, 66kV and EHV. Supplying a complete range of power cable accessories to support the installation and maintenance of low/medium and high voltage power systems:
Key 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 MVÂ
Published 18 Mar 2026
INDUSTRIAL LABEL PRINTING SOLUTIONS When clear, durable and professional identification is required across control panels, cable systems, production facilities and industrial installations, print quality, reliability and ease of use are critical. Cembre industrial label printers are designed to support...
Published 18 Mar 2026
HIGH VOLTAGE JUNCTION BOXES & ENCLOSURES When high-voltage power distribution and cable termination are required, safety, enclosure integrity and long-term reliability are critical. HV Junction Boxes and Electrical Enclosures manufactured by Abtech are engineered for the safe distribution, cable termination and protection...
