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Pioneering Safety in Onshore & Offshore Wind: First Graduates of New GWO High Voltage Cable Pulling Standard

The Wind Academy

The Wind Academy, the UK leading facility delivering GWO and Technical Trade Training Courses, has marked a major milestone in onshore and offshore wind technician training with the successful delivery of the first-ever GWO High Voltage Cable Pulling (HVCP) Training Standard.

Hosted at their brand-new Training Facility at the Port of Blyth, this pilot programme has produced some of the very first professionals in the world to gain certification under this innovative new standard — developed by the Global Wind Organisation (GWO) to boost safety, reduce cable damage, and improve operational uptime across the wind sector.

What is the HVCP Module?

The HVCP module forms part of the new GWO High Voltage Training Standard and equips participants with the skills, safety awareness and confidence to carry out high voltage cable installation both onshore and offshore.

Aimed at commissioning and service technicians, this standard supports work in HV operations or cable pulling under a Safe System of Work (SSOW). The HV Standard has been highly requested by many of the leading members of the Global Wind Organisation with input from Cubico Sustainable Investments, ENERCON, ENGIE, GE Vernova, Nordex Group, Northland Power Inc., Ørsted, RWE, Siemens Gamesa, SSE Renewables and Vestas.

Why This Matters for the Industry

By standardising HV cable pulling procedures and ensuring rigorous training, the new GWO HVCP standard helps:

• Prevent costly cable damage during installation

• Protect worker safety in challenging offshore conditions

• Maintain uptime and reliability of wind farm assets

HV Jointer Training at the Wind Academy

The Wind Academy also provides brand-specific Cable Termination Courses for leading cable accessory manufacturers including Nexans (Euromold), Pfisterer (Connex), 3M Electrical, and NKT.

Thorne & Derrick

Leading Specialist Electrical Distributor to the Global Renewable Energy Industry

Thorne & Derrick supply High Voltage Cable Accessories, Jointing Tools & Power Distribution Equipment up to 66kV – we hold several Framework Supply Agreements with international energy providers, OEM’s and High Voltage Power Energy Companies.

From the largest stocks in the UK & EU we supply global projects with HV Cable Accessories to energise projects – this includes Nexans Euromold, Pfisterer Connex & 3M Cold Shrink Separable Connectors, Joints & Terminations at 11kV/33kV/66kV.

This is complemented by the most extensive stocks of Cable Preparation, Cutting, Crimping & Spiking Tools for insulation, screen, sheath removal of MV & HV cables including Alroc, Ripley, Hivotec, Cembre, Klauke, Boddingtons and PENTA.

Supplying Cable Termination, Jointing, Pull-in & Electrical Equipment up to 66kV

OSHA’s First Arc Flash Safety Update in 20 Years — What It Means for You

In November 2024, OSHA released its first significant update to arc flash safety guidance in nearly 20 years. The revision is designed to reduce arc flash incidents and align safety practices with the NFPA 70E: 2024 standard.

This Article from CBS ArcSafe covers the implications to industry of this significant electrical safety guidance renewal and outlines their extensive range of remote-racking products for the safer operation of LV MV HV electrical equipment, including circuit breakers.

“It’s been two decades since OSHA updated its arc flash safety guidance. That just changed — and it’s a big deal.”

Electrical Safety Myth-Busting & Best Practices

What’s New in OSHA’s Arc Flash Safety Update?

Myth-Busting Electrical Safety

• Myth: De-energized equipment is automatically safe.
  Reality: Without proper lockout/tagout, dangerous energy may remain.
• Myth: Low-voltage systems cannot cause arc flash.
  Reality: Arc flashes can happen at relatively low voltages — OSHA now requires appropriate PPE for energized work above 50 V.

“Any energized work above 50 V requires appropriate PPE — low voltage doesn’t mean no hazard.”

Defining Arc Flash Boundaries

OSHA clarifies three approach zones used to reduce shock and arc blast injuries. These align with NFPA 70E Tables for voltage, fault current and incident energy.

• Limited Approach Boundary — safe distance for unqualified workers.
• Restricted Approach Boundary — qualified workers with PPE only.
• Arc Flash Boundary — distance where incident energy reaches 1.2 cal/cm², enough to cause second-degree burns.

Raising aRC fLASH Hazard Awareness

• Inspect for damaged equipment before work.
• Always verify de-energization and follow lockout/tagout.
• Wear correctly rated arc flash PPE based on the hazard assessment.

Protecting eLECTRICAL Workers

OSHA supplies an Employer Guide and three concise worker one-page sheets covering hazard assessment, administrative controls, PPE selection and training.

Safety is a system, not an afterthought. The update encourages using the hierarchy of controls — elimination, engineering, administration, and PPE — and involving workers in safety programs to move from reactive to proactive safety practices.

How CBS ArcSafe Helps

As a distributor of CBS ArcSafe, Thorne & Derrick provide technologies that reduce worker exposure – this is a customer focussed, consultative process involving site surveys to assess risk and deliver user training to ensure optimum use of CBS ArcSafe remote racking equipment.

Remote racking and switching devices allow technicians to operate breakers and switchgear from outside the arc flash boundary.

• Remote racking & switching solutions
• Arc flash & power system studies
• Field services & equipment maintenance
• Extensive inventory of low- & medium-voltage equipment

“Safety starts before the spark.”

Remote Racking Systems

Universal Rotary Remote Racking System CBS ArcSafe RRS-1

A versatile remote racking system designed for safe and reliable operation of low, medium, and high voltage circuit breakers.

View CBS ArcSafe RRS-1 →

Lightweight Rotary Remote Racking System CBS ArcSafe RRS-1 LT

Compact and lightweight remote racking system ideal for confined spaces and quick deployment in the field.

View CBS ArcSafe RRS-1 LT →

Dual-Mode Rotary Remote Racking System CBS ArcSafe RRS-4

Features dual operational modes for enhanced flexibility and safety in remote racking applications.

View CBS ArcSafe RRS-4 →

Partner with Thorne & Derrick

Partner with Thorne & Derrick for your next electrical safety upgrade.

We provide technical expertise, online demos, and reliable specification and supply of CBS ArcSafe remote racking and switching solutions.

Contact Us Today

Explore CBS ArcSafe Range

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Electrical Safety for Low & High Voltage Power Systems

Thorne & Derrick are the UK’s leading Specialist Distributor of Electrical Safety Equipment to provide protection to personnel, plant and assets depending on the reliable operation of underground power cables and overhead line conductors.

We protect substation engineers, AP’s & SAP’s, cable jointers, overhead linesmen and utility workers with PPE and electrical safety products including insulating gloves, voltage detectors, insulating matting and portable earthing – we stock and supply products to ensure worker safety when carrying out maintenance, repair and construction on LV MV HV switchgear, substations, cables and electrical equipment from market-leading manufacturers including PENTA and Catu Electrical, part of the Sicame Group.

UK & Export Sales | Technical Support | Customer Service & Sales

Step-by-Step Guide for a 33kV T-Boot Termination

In this guide, Harvey Ross (HV Harv) demonstrates the key stages of a 33kV T-boot termination on a Nexans GT1 incomer. This process requires accuracy to ensure a watertight seal, maintain insulation integrity, and meet manufacturer specifications. Using specialist tools – including the Ripley Tools, US15 Pro Max, US02 & US10, as well as the ALROC LH2 – Harvey shows how each stage can be completed efficiently and to a high standard. All tools featured are available from Thorne & Derrick, jointing tool stockists, suppliers & distributors, trusted by HV professionals worldwide. The video below shows the full process, with our step-by-step breakdown following.

jointing Tools Used in This T-Boot Termination

Ripley US15 Pro MAX

High-precision insulation removal tool designed for fast, consistent results on medium and high-voltage cables.

View Ripley US15 Pro MAX →

Ripley US02

Reliable semi-con screen removal tool ensuring smooth, damage-free stripping for high-voltage cable preparation.

View Ripley US02 →

Ripley US10

Lightweight tool engineered for quick and precise chamfering of conductor ends to improve termination quality.

View Ripley US10 →

Alroc LH2

Heavy-duty cable cutter with a flexible cutting head for easy access to cables in confined spaces.

View Alroc LH2 →

PF CLeaning Wipes

Industrial-grade wipes for effective cleaning and surface preparation during cable jointing and termination work.

View PF Cleaning Wipes →

All of these tools are available from Thorne & Derrick (Power and Cables) – trusted by LV, MV & HV professionals for safety, precision, and performance.

Cable Preparation & Initial Measurements

1. Measure the Bushing

   • Begin by measuring the bushing depth.

   • Measure back 285mm from the bushing end.

   • Sand 65mm of insulation to ensure a watertight seal.

2. Clean the Surface

   • Wipe the prepared surface thoroughly with a PF cleaning wipe.

XLPE Insulation Removal with Ripley US15 Pro Max

3. Remove Outer Insulation

   • Use the Ripley US15 Pro Max to make a circumferential cut, then transition to a spiral cut.

   • This tool excels in tight spaces and removes thick insulation with ease.

4. Finish the Cut

   • Use a hooked cable knife (a “hold-to-fall knife”) to flick out the final insulation section.

5. Remove Water Barrier & Copper Tape

   • Strip off the water blocking layer.

   • Remove the copper binding tape.

   • Clean the outer sheath again with a PF wipe.

Install Mastic & Prepare the Screen

6. Apply Water Mastic

   • Apply mastic around the cable as per kit instructions.

7. Bend Back Copper Screen Wires

   • Fold the screen wires back neatly in preparation for earth bonding.

Stress Control & Semi-Con Removal

8. Measure for Stress Control Tube

   • Mark 65mm from the screen cut to guide the positioning of the stress control tube.

9. Remove Semicon Layer

   • Use the Ripley US02 to remove the semi-conductive layer down to 30mm.

   • Tie off and sand as necessary for a smooth surface.

Cable Stripping & Chamfering

10. Strip Primary Insulation

    • Using the ALROC LH2, set the blade to the depth of the lug barrel.

    • Strip the insulation cleanly.

11. Chamfer the Conductor

    • Use the Ripley US10 to add a smooth chamfer to the end of the insulation.

    • This compact tool creates a clean finish, reducing stress points.

12. Prep Conductor

    • Tape the conductor end to prevent strand splay.

    • Clean the insulation and apply the termination grease (usually supplied with the kit).

Connector Assembly & Final Termination

13. Install Stress Control Tube

    • Slide it down to the 65mm marker created earlier.

14. Install Lug

    • Prep the conductor.

    • Slide on the lug and shear it off according to manufacturer torque ratings.

    • Clean and reapply grease.

15. Fit the T-Boot

    • Apply termination grease to:

      • The lug

      • Stress control tube

      • Inside of the T-body boot

    • Slide the boot on facing the correct direction.

Final Steps: Earth Bonding and Securing

16. Mount the Termination

    • Push the booted termination onto the bushing.

    • Fit the cleat to secure the assembly.

17. Dress Earth Wires

    • Straighten and align the copper screen wires.

    • Use one wire to wrap and secure the bundle for a clean finish.

Complete 33kV T-Boot Termination

What you now have is a fully installed Nexans 33kV T-boot termination, completed with precision using high-quality Ripley cable preparation tools.

Want to place an order for the tools used in this termination? Contact our team of experts – offering 40+ years of industry experience, we distribute the most extensive range of 11kV 33kV 66kV MV HV Medium & High Voltage Cable Joints, Terminations & Connectors from manufacturers including Südkabel, 3M, Prysmian, Nexans Euromold, Elastimold, Pfisterer CONNEX & SEANEX and Shrink Polymer Systems.

Contact Our Experts

Why Should You Separate Electrical Cables?

Separating electrical cables

Prevent Trip Hazards with CableSafe Safety Hooks

Thorne & Derrick supply a comprehensive range of Safety Tools and Equipment to support safe working practices across industries including construction, renewables, data centres, rail, manufacturing, and the oil, gas, and petrochemical sectors. We also offer a specialist range of Push Pull Tools designed to reduce hand injuries and enhance workplace safety.

Separating electrical cables isn’t just good practice—it’s essential for ensuring safety, system performance, and regulatory compliance. Whether you’re working in industrial, commercial, or residential settings, here are five key reasons why cable separation matters:

Cable & Electrical Safety

When power cables are bundled together tightly, they can generate excessive heat. If not properly ventilated or separated, this heat can lead to insulation damage, short circuits, or even fire hazards. Separating cables helps reduce this risk and ensures safer operation.

Electromagnetic Interference (EMI) Reduction

Electrical cables, especially those carrying high current, emit electromagnetic fields. If signal or communication cables run too closely alongside power cables, they can pick up unwanted interference. Separating them helps maintain signal integrity and reduces noise or data errors in sensitive equipment.

Ease of Maintenance & Troubleshooting

Organised and separated cables make it easier to identify, inspect, or replace specific lines when necessary. This reduces downtime during maintenance and makes installations more professional and manageable.

Prevention of Mechanical Damage

When cables are tangled or stacked together, there’s a higher chance of bending, pulling, or abrasion—especially during equipment movement or vibration. Separation prevents wear and tear and extends the cable lifespan.

Compliance with Electrical Standards

Many safety codes and regulations (like NEC, IEC, or OSHA standards) recommend or require physical separation between certain types of cables, especially in industrial or hazardous environments.

CableSafe Safety Hooks in Use Preventing Trip Hazards and Ensuring Electrical Cable Separation on Industrial Walkways

Cable Safety Equipment | Cable Stand | Cable Bridge | Cable Rail | Cable Guard | Dropped Object Prevention Mats

Cable Management Practices

Separating electrical cables is not just about tidiness—it’s a fundamental part of designing safe, efficient, and reliable electrical systems. Whether you’re an installer, maintenance engineer, or system designer, adopting good cable management practices is a small step that can make a big difference.

Looking for reliable cable management solutions?

Thorne & Derrick are UK specialists in electrical safety equipment. Contact our team for expert advice or to request a quote on CableSafe hooks and other safety tools.

PENTA MTAG | Enhancing Rail Safety with High Voltage Detectors

PENTA MTAG

High Voltage Detector

Now Available from Thorne & Derrick

At Thorne & Derrick, we support the UK rail industry by supplying safety-critical technology designed to protect workers and infrastructure. As an authorised distributor of PENTA Electrical Equipment, we provide a range of innovative products that enhance rail safety across the medium and high voltage power network (MV HV) – the voltage detectors are used to ensure electrical safety on typical voltage distribution systems at 11kV, 25kV, 33kV and 66kV.

Maintenance engineers working on high-voltage railway networks now have a powerful new tool to ensure their safety during critical maintenance operations.

One such product is the PENTA MTAG — a smart high voltage detector recently featured in Rail UK News.

The PENTA MTag is a state-of-the-art voltage detector designed specifically for proving dead on high-voltage distribution systems from 1kV to 69kV, including the 25kV railway network commonly used in overhead line electrification systems.

Developed to meet IEC standards and refined through feedback from industry experts, the PENTA MTag offers unparalleled reliability, durability, and ease of use, providing maintenance crews with confidence when verifying the absence of voltage.

Voltage Detectors | Pictured MV Voltage detector MTAG from PENTA | These voltage detectors are designed for “proving dead”, making sure that nominal voltage is actually absent on a circuit in a high voltage distribution system between 1kV and 66/69kV (no-voltage verification).

What is Penta MTAG?

The PENTA MTAG is a portable, intelligent high-voltage detection system that offers workers in the rail industry a reliable method of confirming that overhead lines are de-energised before work begins. With automatic detection and clear visual/audible alarms, PENTA MTAG enhances electrical safety for teams working on or near electrified tracks.

This technology is a step forward in improving protection during routine maintenance, emergency repairs, and infrastructure upgrades on 25kV OLE Systems.

Key Features

• Non-contact high voltage detection

• Automatic activation when magnetically attached to the conductor

• Failsafe warning system with high-visibility LED lights and audible alerts

• Rugged, compact design built for the rail environment

• Lightweight and easy to deploy in seconds

Engineered for safety in real-world conditions

Railway maintenance often takes place in demanding environments, where visibility, weather, and noise can interfere with safety checks. The PENTA MTag has been designed with these challenges in mind.

Its 100 dB sound signal can be heard even in heavy traffic or high winds, thanks to a natural acoustic horn that amplifies the sound. In addition, the voltage detection device features a wide-angle visual indicator that remains clearly visible in all common working environments, including direct sunlight and fog. The innovative optic ring design ensures visibility even from the side, improving awareness of the whole team at the job site.

Built to withstand the rigors of outdoor use, the PENTA MTag features a sealed, watertight electronics compartment that prevents moisture ingress, ensuring long-term reliability. Maintenance crews and safety teams will appreciate the direct access to the battery, which simplifies replacements and minimises downtime – complete range of extendable and telescopic insulating and operating poles are available.

Engineer installs PENTA MTAG high voltage detector on overhead power line using hot stick

A game-changer for railway maintenance

Safety is paramount in high-voltage railway maintenance, and the PENTA MTag addresses the specific needs of engineers working on 25kV overhead line systems. The voltage detection device has been optimised to ensure that maintenance crews can quickly and confidently verify no-voltage conditions before conducting work, minimising risks associated with high-voltage circuits.

Its reliable detection capabilities even in railways stations or multiple parallel lines, and durable design, make it a trusted tool for maintenance professionals working on railway networks around the world.

Designed with the user in mind

“The PENTA MTag is the result of years of feedback from maintenance professionals,” said Bill Earlie, Commercial Manager for PENTA UKI. “We’ve developed a tool that meets the exacting safety standards of the railway industry while ensuring ease of use and long-term reliability.

The PENTA MTag offers audible and visual feedback that cuts through the noise and visibility challenges faced by railway maintenance engineers every day.”

PENTA is a leader in the development of high-voltage testing equipment for critical sectors such as railways, energy utilities and Industries. With, a commitment to innovation and reliability for safety and performance, PENTA continues to develop products that meet the evolving needs of maintenance professionals worldwide.

Why Choose PENTA?

PENTA is a UK-based manufacturer of specialist safety equipment for the rail and electrical engineering sectors. Their solutions are trusted by Network Rail and contractors nationwide to meet the highest standards of safety and compliance.

Thorne & Derrick – Your Rail Safety Partner

We supply the full range of PENTA products including:

• MTAG High Voltage Detectors

• Portable Earths & Short-Circuiting Equipment

• Line Testers & Voltage Detectors

• Insulated Tools & Rail-Specific PPE

Whether you’re working trackside, in depots, or on infrastructure upgrades, Thorne & Derrick can help you specify and supply the correct Medium & High Voltage equipment to protect your people and operations.