Blog
Electrical Breakdown Of Air & Solid Dielectrics
August 20th, 2019
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uploaded by Chris Dodds - Thorne & Derrick Sales + Marketing Manager
In this first of a series of 15 blogs we provide Chapter breakdowns for the Nexans published book, “Medium Voltage Cable Accessories, A Theoretical and Practical Approach”.
Today, we overview Chapter 2, Electrical Breakdown Of Air & Solid Dielectrics.
The book covers the installation of medium voltage cable terminations, separable connectors, cable joints and associated LV MV HV Power Cable Accessories such as cable glands, lugs and cable cleats.
Great emphasis is placed on failure modes of medium voltage cables and methods of preventing potential problems in service of electrical power systems operating typically at 11kV/33kV.
Essential reading for:
- Lead Electrical Engineers
- Electrical Project Engineers
- Principal Electrical Engineers
- Plant Engineers
- LV HV EHV Cable Jointers
- ATEX Inspectors
- Substation Commissioning Managers
- LV HV EHV Project Managers
- Buyers & Procurement Managers
- SAP’s
- Sales Managers & Engineers
The book is an instant hit with DNO’s, IDNO’S, ICP’s, MV HV Cable Jointers, Cable Contractors, Cable Jointer Training Centres, Electrical Contractors and Substation Engineers.
Chapter 2
Electrical Breakdown of Air & Solid DielectricsÂ
from Medium Voltage Cable Accessories
- 2.1 Electrical breakdown of air
- 2.2 Electrical breakdown of solid insulating materials
- 2.3 Effect of air/solid combinations on voltage distribution
- 2.3.1 Voltage distribution between infinite parallel plates
- 2.3.2 Voltage distribution between concentric cylinders
- 2.3.3 Voltage distribution between concentric cylinders with two dielectrics
- 2.3.4 Maximum electric stress in a cylindrical dielectric
Nexans (Euromold) manufacture high voltage Screened Separable Connectors (Elbow & Bolted Tee), Cable Joints & Cable Terminations (Cold Shrink & Heat Shrink), Bushings and Surge Arresters are available to suit 11kV, 33kV and up to 66kV distribution networks.
Medium Voltage Cable Accessories Book Published By Nexans
- Format: Hardback
- Extent: 160pp
- Size: 300x215mm [Nexans 11kV 33kV Cable Jointers Book]
- ISBN: 978-0-9573785-0-6
- RRP: £79.99
- Illustrations: Nexans Power Accessories (UK)
- Publication Date: March 2013
Medium Voltage Cable Accessories Book Published By Nexans
NEXANS pOWER CABLE ACCESSORIES
In January 2018 Thorne & Derrick International, based in the UK, signed a UK Distribution Agreement with Nexans Power Accessories UK.
T&D 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 maintenance and installation of HV transformers and switchgear.
- Slip-on Cable Terminations
- Cold-shrink Cable Terminations
- Heat-shrink Cable Terminations
- Cable Joints – Heat & Cold-shrink
- Separable Connectors (Euromold)
- Surge Arresters & Switchgear/Transformer Bushings
Signing the new Nexans Power Accessories UK Distribution Agreement is a key part of Thorne & Derrick’s growth strategy for the next 5 years.
With T&D’s knowledge and experience of stocking and supplying Medium & High Voltage Cable Accessories this new partnership with Nexans delivers the most complete range of Joints, Terminations and Connectors for medium voltage power systems.
Training Courses & Services For Cable Jointers
Empower your CV and skill-set by grasping the 66kV Jointer Training opportunity. Jointers must currently be 33kV Competent and experienced to be ready to undertake the step-up to 66kV from 33kV. 11kV Jointer Training Courses also available.
Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.
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 MV HVÂ
Earthing | An Introduction To Earthing & Earthing Designs | Part One
August 19th, 2019
An Introduction To Earthing & Earthing Designs
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uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager
Earthing
Earthing & Earthing Designs
AN Wallis
In this 2 part series of articles AN Wallis introduces earthing system designs including earth electrode systems designed to safely dissipate fault current or other unwanted electrical current to the general mass of earth and also an introduction to lightning protection focusing on systems, strategies and earth terminations and networks.
An earth electrode system, professionally designed by competent Engineers, is essential to ensure the safety of personnel and the protection of equipment from dangerous voltages in and around LV MV HV substations.
AN Wallis are able to offer earth electrode system designs and associated testing services using the most up-to-date equipment and design software ‘CDEGS’. All this is carried out by competent and highly experienced Electrical Engineers and Technicians.
All design works are carried out in accordance with BS 7430:2011 — The code of practice for protective earthing of electrical installations and BS EN 50522:2010 — Earthing of power installations exceeding 1 kV a. c. amongst other specifications.
All materials supplied by A. N. Wallis have been tested and certified by an independent body ensuring the highest quality materials are made available to you.
âž¡ Lightning | An Introduction To Lightning Protection | Networks, Strategy & Systems | Part Two
Earthing System Design
Considerations
An earth electrode system should be designed to safely dissipate fault current or other unwanted electrical current to the general mass of earth. This could include power transmission and distribution, static dissipation, lightning protection as well as other associated systems.
The main considerations of an earth electrode system design should be:
- Is the system safe and suitable for the purpose for which it is intended?
- Is the system rated to carry the design fault currents?
To achieve this a number of steps are required and are detailed below.
Soil Resistivity Surveys
BS 7430:2011 states that ‘on-site resistivity testing should always be carried out prior to carrying out an earth system design and installation’.
The soil resistivity survey is the first step in ensuring the correct design of an earth electrode system. It is essential that accurate measurements are taken at this stage as this data is used to determine what conductors are required in the finished earthing system to give a safe and suitable design. Corrupt data taken with inadequate test equipment could lead to a vastly over- or under-engineered solution.
ANÂ Wallis use high specification test equipment to carry out soil resistivity testing, gaining data from tried and tested methods. This raw data is then analysed using CDEGS software to produce a representative electrical equivalent soil model which can then be used in the earthing design process.
Earth Electrode System Design
Earth Rods
There are many factors that go into producing a compliant earth electrode system design: fault current levels, fault duration, ground make up and interconnected sites are but a few.
All of the parameters are analysed using the CDEGS software to ensure Touch, Step and Rise of Earth Potentials are within safe levels.
Our team of competent Engineers consider all of the above and more to ensure the final design is not only safe and suitable for its purpose, but also to ensure the system can be installed using the most economic processes giving you the most cost effective solution.
Overall System Testing
BS 7430:2011 states that ‘all work should be carried out under the control and direction of a competent person.’
AN Wallis are able to offer test and inspection services for both new and existing installations. All works are carried out in accordance with BS 7430:2011 by our trained and competent Engineers and Technicians.
The period between periodic inspection and tests can only be determined by the environment that the system is installed in, for example the harsher the environment the more regular the inspection.
Please feel free to contact us to discuss your particular requirements.
Earthing – Copper Earth Tapes | Bars | Clamps | Rods
THORNE & DERRICK
T&D are Specialist Distributors to UK Distribution Network Operators (DNO’s), NERS Registered Service Providers, ICP’s and HV Jointing Contractors of an extensive range of LV, MV & HV Jointing, Earthing, Substation & Electrical Eqpt – this includes 11kV/33kV/66kV cable joints, terminations and connectors for both DNO and private network applications.
Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.
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 MV HVÂ
Arc Flash | 3 Articles from a High Voltage Specialist
August 1st, 2019
“30,000 Arc Flash Incidents per year” Source: ISHN
Arc Flash Articles
Thorne & Derrick International would like to thank Pat Mynett for allowing us to publish his series of Arc Flash articles – over the course of these articles we have discussed the definitions, dangers, statistics, causes, prevention and protection against arc flash.
Pat is CEO at HV Training and Consulting Pty Ltd and is a High Voltage Specialist.
âž¡ Read More:
PROGARM THE ARC FLASH SPECIALISTS
ProGARM are the leading UK manufacturer of high quality Arc Flash Clothing, Garments & Workwear – Thorne & Derrick work successfully with them Protecting Lives.
Thorne & Derrick are leading Specialist Distributors & Stockists of LV, MV & HV Cable Installation, Jointing, Substation & Electrical Equipment.
THORNE & DERRICK SPECIALIST ELECTRICAL DISTRIBUTOR
LVÂ ♦ MVÂ ♦ HV
Thorne & Derrick International, based in the UK, distribute the most extensive range of LV, MV & HV Cable Jointing, Terminating, Pulling & Installation Equipment – we service UK and international clients working on underground cables, overhead lines, substations and electrical construction at LV, 11kV, 33kV and EHV transmission and distribution voltages.
T&D, CATU Electrical Safety & Arc Flash Protection Specialists for SAP’s, Linesmen, Jointers & Electrical Engineers – Largest UK Stockist
INVITATION
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.
Arc Flash – The Electrician’s Insidious Companion
July 31st, 2019
Arc Flash – The Electrician’s Insidious Companion Image: Safety Management Services, Inc.
Arc Flash
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Blog Written By Patrick Mynett -
CEO / High Voltage Specialist at HV Training and Consulting Pty Ltd
Thorne & Derrick International would like to thank Pat Mynett for allowing us to publish his article Arc Flash – The Electrician’s Insidious Companion.
Pat is CEO at HV Training and Consulting Pty Ltd and is a High Voltage Specialist.
In 2014, Pat Mynett decided there was room in the market for another RTO to provide quality electrical training. Especially from a person with recent industry experience, whose main interest was in the electrical safety of workers and the welfare of the plant. Arc flash safety training was a glaring omission in the industry so he developed, wrote and registered a nationally accredited arc flash course for those who work in an arc flash hazard zone.
This is Part 2 in a series of 3 articles about the dangers of arc flash – over the course of these articles we have discussed the definitions, dangers, statistics, causes, prevention and protection against arc flash.
- Introduction to Arc Flash
- Arc Flash – The Electrician’s Insidious Companion
- Overcoming Arc Flash Hazards
The Electrician’s Insidious Companion
Your insidious companion is always lurking there in the background, looking to pounce on people who take short cuts, ignore rules or do not understand how to ban him from the worksite. If your insidious companion pays you a visit you may receive serious burns or pass on to the next world. Do not let this happen to you.
What is an uncontrolled Arc Flash?
A type of electrical explosion that results from a low-impedance (Short Circuit) connection to earth or another voltage phase in an electrical system.
It is the light and heat produced from an electrical arc supplied with Sufficient Electrical Energy to cause fatalities, serious injury, substantial damage, fire, or worse.
What is Sufficient Electrical Energy
In rough figures, a 125kVA transformer 400V (LV) supply would have a fault current capacity of over 3600amps. This just gives an illustration of the current available at the transformer LV terminals.
At the main switchboard this could have dropped considerably, depending on the impedance of the mains, but will always significantly exceed the switchboard load rating.
Padmount transformers can be 20 times the capacity of the above example.
Severity of an arc flash
The severity of an arc flash depends on the amount of fault current available and the duration (Time) the fault is on the system. The system’s voltage is only significant at LV where the volt drop across the arc can be up to 60% of the Low Voltage, so it appears to the protection as a high impedance fault, which therefore clears slowly.
This delay may mean the difference between serious and fatal burns. The careless worker is therefore completely dependent on the distance from and size of, the feeding transformer and most importantly, the switchboard and protection design, commissioning and ongoing maintenance (including tripping batteries) being done correctly.
Overcoming Arc Flash Hazards
Energy received from an arc flash
The energy produced by an arc flash and the energy received from an arc flash are two different things. The energy received from an arc flash is measured in Incident Energy (cal/cm2) depends on the distance from the arc flash. The further you are away from the arc flash source the less the incident energy.
What events can cause an arc flash?
An arc flash initiated when the system is static, no movement of system devices. These events can be caused through vermin (rats, mice, etc.) and hot joints. These events generally occur without injury to personnel as no work is being carried out in the vicinity. However, these events can and do cause significant damage to equipment.
An arc flash initiated when there is movement in the system.
The movements can be;
- working live,
- operator error,
- closing, opening and racking of circuit breakers,
- operating switches/isolators live,
- inappropriate operation of switchgear,
- trying to operate damaged switchgear,
- dropping tool/ equipment on live conductors/busbars,
- circumventing interlocks etc.
When arc flash events are due to movement, fatalities or significant injuries can occur, as well as major damage to equipment.
What can you do to protect against an arc flash incident?
- Do not take short cuts!
- Do not work live!
- Do not operate faulty equipment!
- Get an understanding of arc flash, its causes, its hazards and how to mitigate the hazards!
- Know when it is not safe to proceed with the work!
- Know the correct PPE to select and wear!
- Get training in arc flash hazards and mitigation!
arrow: Protecting Cable Jointers & Electrical Engineers When Working Live On Cables & Switchgear – comprehensive ranges of insulating matting and insulated tools.
Training to recognise Arc Flash Hazards
Now there is training available for people who work at the coal face and operate electrical equipment. This arc flash training imparts the knowledge to recognise, risk assess, mitigate, select the correct PPE for arc flash hazards and know when it is not safe to proceed with the work.
Arc Flash | Jackets | Coveralls | Trousers | Sweatshirts | Helmets | Gloves ProGARM
Selecting appropriate PPE
Wearing the correct type of PPE when working in an arc flash environment is imperative. If an arc flash occurs, without PPE you may not go home for a long time or you may not go home at all.
 ➡ Further Reading
- Arc Flash Clothing & Protection For Safe Windfarm & Wind Turbine Working
- Arc Flash Clothing – PPE To Protect Highways, Street Lighting & Utility Contractors
- Eliminate Arc Flash To Minimise Downtime & Repair Costs At The Circuit Breaker
- Do Insulating Gloves Provide Arc Flash Protection?
- Can Arc Flash Clothing Save Utility Workers Lives?
- Electrical Safety – Arc Flash Accidents & Electrocution In LV-HV Installations
- Arc Flash Calculation – Selecting Clothing & PPE To Protect Lives Against Arc Hazard
THORNE & DERRICK SPECIALIST ELECTRICAL DISTRIBUTOR
LVÂ ♦ MVÂ ♦ HV
T&D distribute the most extensive range of LV, MV & HV Cable Jointing, Terminating, Pulling & Installation Equipment – we service UK and international clients working on underground cables, overhead lines, substations and electrical construction at LV, 11kV, 33kV and EHV transmission and distribution voltages.
- Key Products: MV-HV Cable Joints & Terminations, Cable Cleats, Duct Seals, Cable Transits, Underground Cable Protection, Cable Jointing Tools, Feeder Pillars, Cable Ducting, Earthing & Lightning Protection, Electrical Safety, Cable Glands, Arc Flash Protection & Fusegear.
- Distributors for: 3M, ABB, Alroc, Band-It, Catu, Cembre, Centriforce, CMP, Elastimold, Ellis Patents, Emtelle, Furse, Lucy Zodion, Nexans Euromold, Pfisterer, Polypipe, Prysmian, Roxtec.
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, CATU Electrical Safety & Arc Flash Protection Specialists for SAP’s, Linesmen, Jointers & Electrical Engineers – Largest UK Stockist
INVITATION
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.
Arc Flash Learning & Resources
Thorne and Derrick are proud to be distributors of ProGARM arc flash coveralls and protection.
We can help – should you require arc flash calculators or advice on the type of clothing and protection available please do not hesitate to contact us.
Introduction To Arc Flash
July 31st, 2019“30,000 Arc Flash Incidents per year” Source: ISHN
Arc Flash
-
Blog Written By Patrick Mynett -
CEO / High Voltage Specialist at HV Training and Consulting Pty Ltd
Thorne & Derrick International would like to thank Pat Mynett for allowing us to publish his article Introduction To Arc Flash.
Pat is CEO at HV Training and Consulting Pty Ltd and is a High Voltage Specialist.
In 2014, Pat Mynett decided there was room in the market for another RTO to provide quality electrical training. Especially from a person with recent industry experience, whose main interest was in the electrical safety of workers and the welfare of the plant. Arc flash safety training was a glaring omission in the industry so he developed, wrote and registered a nationally accredited arc flash course for those who work in an arc flash hazard zone.
This is Part 1 in a series of 3 articles about the dangers of arc flash – over the course of these articles we have discussed the definitions, dangers, statistics, causes, prevention and protection against arc flash.
- Introduction To Arc Flash
- Arc Flash – The Electrician’s Insidious Companion
- Overcoming Arc Flash Hazards
What is an Arc Flash?
An electric arc occurs whenever a circuit breaker, switch or isolator (Device) is opened and when there is current is flowing in the circuit. However, most devices under normal operating conditions are designed to control the arc when opening or closing.
An arc flash may occur when the arc is uncontrolled and there is sufficient energy released to cause harm or damage.
Arc flashes occur both at high voltage and at low voltage. There is little discrimination, low voltage arc flashes injuries are just as damaging at high voltage injuries.
An arc flash is the light and heat produced from an electrical arc supplied with sufficient electrical energy to cause substantial damage, harm, fire, or injury.
What is sufficient electrical energy, lets look at two situations, firstly a domestic situation and then a commercial, industrial or mining situation.
A domestic situation:Â In most domestic dwellings, even though the risk of electric shock is present, the risks of an arc flash are only minor, as there is normally insufficient energy to cause a serious arc flash. The main switch / main circuit breaker is normally quite a distance from a transformer. The distance and smaller cables sizes results in much higher circuit impedance and lower fault current.
A commercial, industrial or mining situation:Â This is a different story, as the results of an arc flash can be catastrophic. The main switch / main circuit breakers may be only a few meters from a transformer, fed by busbars or large cables. This results in extremely low impedance and very high fault currents.
What can initiate an Arc Flash?
There are many things that can initiate an arc flash, they can be divided into two groups.
- Group 1: An arc flash when the electrical system is static and
- Group 2: An arc flash when there is movement in the electrical system
Group 1:Â An arc flash can occur and be caused by items such as vermin, hot joints etc. Â In these cases, there can be substantial damage to equipment, but injury to people is extremely rare. Vermin avoid areas when people are around.
Group 2: Â An arc flash can occur and be caused or initiated by items when there is movement in the system, such as closing or opening of circuit breakers, switches or isolators, applying earths, opening enclosures, dropping tools, inappropriate use of tools etc.
This is where the majority of arc flash injuries occur.
Arc flash can be caused by; switching devices being operated that are faulty or damaged, circuit breakers racked when closed, isolators opened on load, applying earths to energised conductors, closing a switch onto an earthed conductor, inadvertent contact through working close to live conductors, dropping tools onto live conductors, drilling into enclosures and the drill contacts an energised conductor.
Many of these causes are due to human error, working live, complacency, lack of training, lack of maintenance, taking short cuts etc.
Who are the people that get hurt
from an Arc Flash?
Nearly all arc flash injuries occur to people in two distinct groups.
Electrical workers and non-electrical workers.
Injuries to electrical workers make up the majority of arc flash injuries. They are the people that generally operate electrical switchgear, work on or close to energised conductors.
Injuries to electrical workers occur due a to lack of understanding, lack of training, complacency and ignoring or short cutting safety rules. There is tremendous pressure on electrical workers to keep electricity supply on when working on or close to energised conductors.
This pressure is applied by people who do not have any understanding of electrical hazards. Legislation in Australia only allows work on or close to energised conductors under strict conditions. Yet many electrical workers still work on or close to energised conductors.
Non- electrical workers who operate industrial switchgear is the other group where arc flash injuries occur.
There are many non-electrical workers in industry that switch industrial electrical low voltage loads on and off.
There are some that operate high voltage switchgear to create an isolation point for non-electrical work. Most of these non-electrical workers would not know what an arc flash is.
How many people get hurt in Australia
through Arc Flash and what can we learn in the UK?
Arc flash injury statistics are hard to acquire and quantify. In many cases this is due to arc flash injuries recorded at electrical injuries.
About three years ago figures were obtained from one Australian state’s hospitals on the number of people admitted with serious electrical (arc flash) burns. When these figures are extrapolated out to cover all of Australia. On average (30) thirty people each year get admitted to hospital with arc flash burns and (1) one fatality occurs every two years.
These figures can be backed up by the fact that in NSW/QLD and WA for the three months ending in November 2018, there was one fatality and 7 people who received serious burns.
In 2014 two fatalities occurred in WA.
It is unfortunate, that many arc flash injuries do not get reported and in some cases the information gets suppressed due to legal reasons.
The UK has 3 times the population of Australia, so it can be reasonably assumed that the numbers of injuries in the UK are 3 times greater.
90 people hospitalised and 1.5 fatalities each year.
What are the costs from an Arc Flash?
There are human costs and financial costs.
Human costs: It is not just the injury, it’s the trauma of recovery (burns take a long time to heal and scar for life), the family trauma (living with someone who is in constant pain and disfigured), loss of income (many burns victims never return to work). The divorce rate of burn victims is extremely high.
Financial costs: Loss of supply can be from an hour to several weeks. A single piece of equipment may only be damaged and easily replaced or a whole switchboard/transformer etc. may be damaged beyond repair. The costs can be from a few dollars up to millions of dollars. I would suspect that arc flash incidents cost Australian industries many millions of dollars each year.
In Conclusion
Arc flash is a real and present hazard.
Yet, it is often ignored or given the pretence to comply by industry.
The majority of electrical workers do not have an understanding of Arc Flash or its hazards, if they did we would not have the number of arc flash injuries that we do have at present. Arc flash training is available, but few companies take it up due to the lack of understanding of the subject.
arrow: Protecting Cable Jointers & Electrical Engineers When Working Live On Cables & Switchgear – comprehensive ranges of insulating matting and insulated tools.
Protect Yourself Against Arc Flash
Arc flash protection is provided by specialist clothing and garments for “head-to-toe” protection.
Enhanced and effective arc flash protection is safely achieved by wearing layers of protective clothing and garments manufactured from inherent fibres and which feature specific Arc Flash resilient components. Without the correct high-quality garments arc protection levels will be compromised.
âž¡ Further Reading
- Arc Flash Clothing & Protection For Safe Windfarm & Wind Turbine Working
- Arc Flash Clothing – PPE To Protect Highways, Street Lighting & Utility Contractors
- Eliminate Arc Flash To Minimise Downtime & Repair Costs At The Circuit Breaker
- Do Insulating Gloves Provide Arc Flash Protection?
- Can Arc Flash Clothing Save Utility Workers Lives?
- Electrical Safety – Arc Flash Accidents & Electrocution In LV-HV Installations
- Arc Flash Calculation – Selecting Clothing & PPE To Protect Lives Against Arc Hazard
THORNE & DERRICK SPECIALIST ELECTRICAL DISTRIBUTOR
LVÂ ♦ MVÂ ♦ HV
T&D distribute the most extensive range of LV, MV & HV Cable Jointing, Terminating, Pulling & Installation Equipment – we service UK and international clients working on underground cables, overhead lines, substations and electrical construction at LV, 11kV, 33kV and EHV transmission and distribution voltages.
- Key Products: MV-HV Cable Joints & Terminations, Cable Cleats, Duct Seals, Cable Transits, Underground Cable Protection, Cable Jointing Tools, Feeder Pillars, Cable Ducting, Earthing & Lightning Protection, Electrical Safety, Cable Glands, Arc Flash Protection & Fusegear.
- Distributors for: 3M, ABB, Alroc, Band-It, Catu, Cembre, Centriforce, CMP, Elastimold, Ellis Patents, Emtelle, Furse, Lucy Zodion, Nexans Euromold, Pfisterer, Polypipe, Prysmian, Roxtec.
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, CATU Electrical Safety & Arc Flash Protection Specialists for SAP’s, Linesmen, Jointers & Electrical Engineers – Largest UK Stockist
INVITATION
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.
Arc Flash Learning & Resources
Thorne and Derrick are proud to be distributors of ProGARM arc flash coveralls and protection.
We can help – should you require arc flash calculators or advice on the type of clothing and protection available please do not hesitate to contact us.
