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345kV USI PPL HPPT Straight Joint – Boston USA
April 28th, 2021Image Courtesy of: Steve Fielder – HV/EHV Cable Jointer at S Fielder Jointing Ltd Grade 1/Leading Hand 400kV Oil 500kV XLPE Senior Cable Jointing Technician.
We are delighted to feature the work of Steve Fielder on our Jointers PhotoBlog – Thorne & Derrick are committed to highlighting the high skill levels and expertise required in the cable jointing industry at a time when widespread concerns prevail about declining jointers workmanship.
Pictured: 345kV USI PPL HPPT Straight Joint

Steve Fielder – Technical Qualifications
- ABB Jointing XLPE Power Cables 52-170kV
- BBUSL (J19) Plumbing Refresher
- Prysmian 132kV DELFT Transition Joint
- BBUSL (J13) Aux Cable Testing
- Nexans Transition Jointing 132kV XLPE/LPOF cables
- Nexans Jointing & Termination 132kV XLPE cables
- Prysmian 132kV XLPE Outdoor Sealing Ends, Gas Immersed Termination
- BBUSL (J11) 275/400kV Fluid Filled Cables
- BBPN (J9) 132kV F/F Cable Jointing
- BICC (J25) Plumbing Part 3 Fluid Filled PPL Cables
- BICC (J2) Plumbing Part 2 Fluid Filled Cables
- BICC (HV3) 66/200kV Fluid Filled Cable Jointing
- CEAT CAVI Field Factory Joint 33kV EPR Insulated Cables (Italy)
- BICC (HV5) 66/500 XLPE Cable Jointing
- BICC (J28) XLPE MIG Welding
- Prysmian Oil Filled MIG Welding
- BICC CAD Welding
- BICC 33kV Solid & Oil Filled Cable Jointing
- BICC (J1) Plumbing Part 1
- Prysmian 132kV 3 Core Oil Click Fit Transition Joint
- Brugg Joints & Terminations for Polymer Cables up to 170kV
- Raychem 11kV-33kV Cable Joints and Terminations
- Tyco 11kV- 33kV Cable Joints and Terminations
- 3M 11-33kV Cable Joints & Terminations
- C & W 33kV Hot Splice Transition Cable Joints
- Prysmian 400kV Oil Filled GIS Cable Terminations
Further Reading
More of Steve’s work
- 110kV G&W Cable Termination – HPFF High Pressure Fluid Filled
- 138kV HPPT
- G&W Gas Straight Joint (40kV 3 Core PILC)
- Masterclass – 400kV Low Pressure Oil Filled Prysmian Extended Ferrule Straight Cable Joint

Jointers blog
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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.
INVITE WEBINAR – The Industry’s Best Online Event For Utility Safety & Operations Professionals
April 27th, 2021
Utility Safety Virtual Conference & Expo
LIVE EDUCATION SCHEDULE May 4-6, 2021
Session: How Does Underground Integrity Management Lead to Public and Worker Safety
Identifying underground defects – before they become hazardous and create emergency work scenarios – helps to eliminate the opportunity for injuries in this type of work.
REGISTER HERE
When: Tuesday, May 4 – Thursday May 6
Time: 11:00 am – 12:15 pm ET
https://utilitysafetyconference.com/

Join this session to:
- Learn how reactive work increases injuries and how being proactive drives them down
- Understand what you need to know about system reliability
- Acquire knowledge about technology that pinpoints important issues to drive a proactive work environment
Presenters:
Ben Browne CUSP Browne, CUSP IMCORP
Ben Lanz, Technology IMCORP
To see the full agenda for the 3 days please click the link: https://utilitysafetyconference.com/agenda/
IMCORP is the technology leader in Medium & High Voltage Power Cable Systems life cycle condition assessment and performance – IMCORP have been helping their clients achieve maximum cable reliability for more than 20 years and have assessed over 130,000 5kV to 500kV cable systems spanning in excess of 160 million feet.
IMCORP Precision ReliabilityTM approach integrates asset condition intelligence into optimized work management processes to maximize cable system reliability at the lowest possible life cycle cost.
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.
All international sales enquiries can be serviced and supplied by our Export Power Team.
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 HV

Stockists for 3M Cold Shrink Electrical | Nexans Euromold | Pfisterer CONNEX

RSCT Connectors | Ground Tap Connectors for Rail Cables & Conductors
April 27th, 2021
RSCT Connectors
RSCT Connectors
Simple & Secure Grounding on Rail Infrastructure
On railway systems, all trackside equipment that has the potential to become live has to be earthed, to protect both people and the environment. This applies not only to catenary pylons, but also to signalling systems, bridge railings, fences, etc. Pfisterer has now developed the RSCT Connectors – a simple, safe, and reliable solution for protecting people and the environment without needing to strip cable insulation.
The RSCT is designed to save a great deal of time in comparison with established practice. The ground tap connector for earth connection cables on railway systems combines almost 100 years of contact technology experience at Pfisterer with its expertise as a “full-service provider” in the field of rail infrastructure.
➡️ Designed specifically to be used with the 265.8mm² ‘Cockroach’ Return Screen Conductor, with 120-150mm² Cu RM or 157.5mm² Al RM ‘Hornet’ bonding cable as Branch Conductor.
- Network Rail PADS Approved Connectors
- Return Screen Conductor T-Connectors
- Pfisterer Sicon 332 846 001

RSCT Connectors Installation
Installation up to 50% Faster
Using insulation piercing technology, main and tap cables are installed without having to strip the insulation. The compression of grounding and tap cables that was previously used, as well as the restoration of the insulation with a Heatshrink sleeve, is no longer necessary. The plastic enclosure with its seals guarantees electric shock protection in accordance with IP1X.
Simple Installation in the Existing System
The RSC-T ground tap connector comprises several parts and can be mounted directly onto an existing system. The bolts of the RSC-T are based on the proven SICON technology (SICON 332 846 001) typical to their range of shearbolt lugs and connectors.
The ground cable is laid in place without any preparatory work and enclosed by the connector using a locking bolt. The SICON piercing bolts penetrate the insulation to establish safe and reliable contact with the ground conductor. Any possible damage to the metallic conductor is avoided by means of the proven SICON technology.

Pfisterer RSCT Connectors
RSCT Customisation
Pfisterer also manufactures RSC-T ground tap connectors to meet individual customer requirements, where experts will carry out all the necessary consultation, dimensioning, engineering, pilot production, testing, and series production.
Patented Contact Technology
The bolts of the RSC-T are based on the proven SICON technology. The patented shear bolt has a stepless construction and utilizes the full load capacity of the thread at all times. The friction disc at the end of the bolt prevents the metal conductor from being damaged. For the RSC-T, the proven SICON bolt has been further developed and equipped with a friction disc which features insulation piercing technology. This establishes a reliable contact with optimum contact force. The SICON bolt is installed using a standard tool and gently shears off on successful installation.
Pfisterer RSCT Benefits
- Reliable contact between grounding and tap
connector - Compatible with anti-theft cables
- No interruption of the main conductor
- Shock-proof in accordance with IP1X
- No open blade for installation
- Saves up to 50% of installation time
- No flame on the track

Technical Connector Information
- Conductor cross-section
- Ground or main conductor: 265.8 mm² *
- Tap conductor: 157.5 mm² *
- Conductor material: copper, aluminium
- Dimensions: 150 × 130 × 60.5 (L × W × H in mm)
- Weight: 1.15 kg
- Other conductor cross-sections available
on request
Rail Cable Accessories, Electrification
& Installation Equipment
Thorne & Derrick supply an extensive range of 400V-33kV Rail Cable Accessories & Power Distribution Systems including feeder pillars to contractors undertaking Low Voltage Power Distribution, HV Electrification & Substations, DC Traction & Networks, OLE and Track Feeder Cable Renewals – a complete range of Network Rail PADS approved track terminations, cable joints, cable repair and connection products up to 25kV AC.
Full range of Cable Pulling Equipment & Products to ensure safe and efficient of rail cables in to cable ducts and containment infrastructure including cable troughs.

Stocking & Supplying | Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Jointing Tools | Cable Pulling Eqpt | Earthing & Lightning Protection | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HV | Live Line Testers

Network Rail PADS Approved | Cable Joints, Terminations & Connections | Distributors & Stockists for 3M Cold Shrink | Nexans Euromold | Pfisterer CONNEX
Live Line Testers | Network Rail PADs Approved 25kV a.c. Capacitive Live Line Tester
April 23rd, 2021
PR by Chris Dodds Sales & Marketing Manager at Thorne & Derrick | 13.04.2021
Following extensive and successful field trial testing the Pfisterer range of Live Line Testers have now received Full Acceptance by Network Rail with Official PADS Approval – specifically this includes Pfisterer KP-Test 5HL Capacitive Live Line Testers for 25kV AC Rail Electrification systems.
The product authorisation by Network Technical Head Power Distribution HV/LV on behalf of the Network Rail Acceptance Panel (NRAP) permits the installation of the Live Line Testers on Network Rail controlled 25kV a.c. infrastructure as a separate device with approved live line poles for:
Pfisterer KP-Test 5HL Capacitive Live Line Testers | With UK specific insulating rod of greater than 600mm length| Pfisterer Part Number | PADS Catalogue No 0040/090157
Pfisterer KP-Test 5HL Capacitive Live Line Testers | Unit as a separate device without an integrated insulated pole | PADS Catalogue No 0040/090158
➡ Certificate of Acceptance PA05/06351 | Network Rail Certification
Thorne & Derrick are currently supplying this range of live line testers to several UK rail projects – we are Approved Vendors to Network Rail, CP6 Framework Delivery Partners and several HS2 Joint Ventures working on rail transport projects.
➡ For further information on Live Line testers by Pfisterer please refer to this download

Further Reading
- Network Rail Full Acceptance for Nexans Tee Connectors & Bushings for 25kV Power Transformers
- 25kV Live Line Voltage Indicators | Network Rail Approved
- Rail Cable Labels with Network Rail & London Underground (LUL) Approval
- Network Rail Approved Cable Trough Delivered to South Rail Systems Alliance
- 3M LO42 Cold Shrink Tube | Track Feeder Cable Joints | Network Rail Approved

Pfisterer CONNEX PADS Approved | Thorne & Derrick supply from stock Standard and Customer Variants of the CONNEX Connector for the termination of 33kV/52kV medium voltage power cables into gas insulated switchgear with inner cone bushings.
Rail Cable Accessories, Electrification
& Installation Equipment
Thorne & Derrick supply an extensive range of 400V-33kV Rail Cable Accessories & Power Distribution Sytems including feeder pillars to contractors undertaking Low Voltage Power Distribution, HV Electrification & Substations, DC Traction & Networks, OLE and Track Feeder Cable Renewals – a complete range of Network Rail PADS approved track terminations, cable joints, cable repair and connection products up to 25kV AC.
Full range of Cable Pulling Equipment & Products to ensure safe and efficient of rail cables in to cable ducts and containment infrastructure including cable troughs.

Joints & Terminations for Network Rail 25kV Electrification Projects | PADS Approved
April 21st, 2021
Joints & Terminations
The following 25kV Joints & Terminations manufactured by 3M Electrical utilising their innovative Cold Shrink Technology are Network Rail (NR) certified and PADS Listed as meeting the requirements for installation on their electrical infrastructure.
25kV single core cables are mainly used to carry 3-phase electrical power supplies from Network Rail trackside switching stations to the overhead line equipment on A.C electrified lines per cable specification:
NR/PS/ELP/00008 25/44kV MDPE High Voltage Power Cable
- Voltage Rating | 25/44kV
- Conductor | Class 2 Compacted Circular Stranded Copper
- Conductor Screen | Extruded Semi-conductive XLPE Bonded
- Insulation | XLPE
- Insulation Screen | Extruded Semi-conductive XLPE Strippable
- Bedding Tape | Water Swellable Semi-conductive Tape
- Screen | Copper Wire Screen 83sqmm
- Separator | Water Swellable Tape
- Cable Sheath | MDPE Graphite Coated

Joints & Terminations
Thorne & Derrick provide competitive prices and delivery from stock for a complete range of Joints & Terminations to suit NR/PS/ELP/00008 25/44kV cable.
3m cold shrink selection table
| 3M Electrical | Cable Accessory | PADS | Conductor Cross Section | Dia Over Insulation |
| 95-AC645-1-400/C | Joint | 054/064139 | 120-400sqmm | 31.5-53.8mm |
| 95-EB62-2 | Termination QTII | 054/064142 | 70-400sqmm | 33.0 – 53.0mm |
| 95-EP631-2 | Termination QTIII | 054/063136 | 240-500sqmm | 38.6 – 51.0mm |

QTII v QTIII Termination Technology
➡ Enquire about our complete range of jointing and preparation tools for peeling and stripping of XLPE insulation, semi-con conductive layer and outer sheath cable jackets from medium and high voltage power cables up to 132kV.

Alroc Tools – Cable Jointing Tools (MV HV)
Rail Cable Accessories, Electrification
& Installation Equipment
Thorne & Derrick supply an extensive range of 400V-33kV Rail Cable Accessories & Power Distribution Sytems including feeder pillars to contractors undertaking Low Voltage Power Distribution, HV Electrification & Substations, DC Traction & Networks, OLE and Track Feeder Cable Renewals – a complete range of Network Rail PADS approved track terminations, cable joints, cable repair and connection products up to 25kV AC.
Full range of Cable Pulling Equipment & Products to ensure safe and efficient of rail cables in to cable ducts and containment infrastructure including cable troughs.

Stocking & Supplying | Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Jointing Tools | Cable Pulling Eqpt | Earthing & Lightning Protection | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HV | Live Line Testers

Network Rail PADS Approved | Cable Joints, Terminations & Connections | Distributors & Stockists for 3M Cold Shrink | Nexans Euromold | Pfisterer CONNEX


