Cable Joints & Terminations LV

Submersible Cable Repair | Repair Damaged Offshore Firepump Cables

Cable: Hydrocable Systems Ltd

• uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager

Cable Repair

Harsh Environment, Hazardous Area & Offshore Cable Repairs

Thorne & Derrick distribute cable repair products to enable the effective re-instatement of cable sheath damage to all types of onshore and offshore LV Low Voltage, MV Medium Voltage & HV High Voltage cables.

The zero halogen flame retardent polyurethane cable sheath suffered service damage in an offshore location (non-hazardous) providing low voltage power to critical submersible firepumps – the sheath required repair to prevent seawater ingress into the cable which would cause severe corrosion to the wire braided cable and compromise the electrical insulation levels and operability of the firewater cables, pumps and fire protection system.

With an outside diameter of 21.7mm around the cable sheath the 3M 82F2 cable joint with a range-take of 20-30mm cable diameters were specified and supplied by Thorne & Derrick to effect the cable repair. Where significant damage is inflicted into the cable sheath, wire braid armour or insulation (EPR XLPE) a complete submersible cable joint can be provided.

The cable repair solution features seawater resistant and flexible 3M Scotchcast 2131 resin which provides stable performance in offshore seawater exposed locations without comprising the flexibility of cable circuit.

Basically, a wraparound mould is placed onto the cable to cover the nick to the sheath and then encapsulating Scotchcast resin is poured into the joint mould to achieve both electrical insulation and mechanical protection to the cable.

Repair & Joint Submersible Cables

Thorne & Derrick International, based in the UK, distribute an extensive range of Offshore Cable Joints to suit halogen free (zero halogen), flame retardant, MUD resistant, heat resistant and fire resistant offshore and shipboard power, control and instrumentation cables.

Cable Repair Systems | Cold Shrink Tubes | Heat Shrink Wraparound

See also: Offshore Cable Joints

How To Repair Damaged Armoured Power Cables

• uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager

Cable Repair Kits | LV Low Voltage | Heat Shrink Wraparound Kits By 3M

The following damaged cables were identified in a works rectification report for the site subcontractor to remedy and repair – repairing damaged cables is not uncommon where often complex cable configurations and large diameter power cables must be installed or pulled onto containment or into trench under pressure from working conditions on site.

The BS5467 power cables form part of the gantry supplies to a LV cable installation of a building service project where work access was confined to a restricted corridor area.

The damaged low voltage feeder cables were classified as non-conformant by the Electrical Manager due to the sheath damage and consequent exposure of the armoured power cables to moisture or contaminants  – the root cause analysis attributed “bad supervision” as the reason for the cable damage and better management of cable installation methods required to prevent reoccurrence.

The confirmed corrective action was to re-instate the cable sheath and repair the damaged cables using heat shrink cable repair kits manufactured by 3M Electrical – the versatile and reliable wraparound repair kits permit immediate repair of nicks, slits and tears to cable sheaths onsite without resort to replace or disconnect the power cable supply.

Where “hot-working” is disallowed and access to a disconnected cable circuit is feasible the tubular cold shrink repair sleeve could be used – heat shrink is a layflat design which effectively “wraps around” the damaged cable section and is then sealed and closed using the provided fixing channel and rail.

Where the inflicted cable damage has penetrated into the wires of the armoured cables we recommend you review our range of armoured cable joints.

Pictured: Damaged BS5467 XLPE Insulated, SWA Armoured Power Cables 4 Core 120sqmm Stranded Copper Conductors

LV, MV & HV CABLE JOINTING, EARTHING, SUBSTATION & ELECTRICAL EQPT

T&D are Specialist Distributors of products to provide safe and reliable LV HV Electrical Cable & Power Distribution Systems  – we are highly customer responsive and absolutely committed to providing a world-class service.

We provide expert technical support and supply from a multi-million pound stock holding:

BS6387 Fire Performance Cable Joint Kits For Prysmian Max-FOH LV Cables

Cable Joints

• uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager

Cable Joints

BS6387

Prysmian FRZHMPJ are Fire Performance & Fire Resistant Cable Joints suitable to install as straight joints for LV Unarmoured and Armoured (SWA AWA) Max-FOH cables with copper conductors up to 1000V:

• Single Core 1.5sqmm-1000sqmm
• Multi Core 1.5sqmm-400sqmm

See the following download for the full and complete technical specification for Prysmian FRZHMPJ cable joints.

Cable Joint Kit Standards

The cable joint kits and shells include rigid glass reinforced phenolic joint shells which are fire retardant and LSOH (Low Smoke Zero Halogen) – the following fire tests have been conducted on the cable joints:

• BS EN 50393:2015 – Test methods and requirements for accessories for use on distribution cables of rated voltage 0.6/1 (1.2)kV.
• BS6387:2013 – Test method for resistance to fire of cables required to maintain circuit integrity under fire categories (Categories C, W & Z).
• IEC 61034-2:2005+A1:2013 – Measurement of smoke density of cables burning under defined conditions

♦ BS6387 – Test method for resistance to fire of cables required to maintain circuit integrity under fire conditions.

Thorne & Derrick are distributors for the complete range of Prysmian Cable Joints for the reliable and safe jointing of industrial, hazardous area and fire resistant power cables to BS6387 standard.

View our complete range of LV Cable Joints.

Cable Sheath Repair | 3M Cable Joints | 3M Cold Shrink | 3M Scotchcast Resins

Street Lighting Cut Outs From Lucy Zodion – WPD Approved (G81)

Street Lighting Cut Outs

• Uploaded By - Chris Dodds (Thorne & Derrick Sales & Marketing Manager)

Press Release: Lucy Zodion

Street Lighting Cut Outs

Lucy Zodion Ltd have secured sole approval for street lighting cut outs in the Western Power Distribution (WPD) Network – the Lucy SLCO cut outs are now approved by all UK Distribution Network Operators (DNO’s).

Lucy Zodion Ltd, leading UK manufacturer of cut-outs, controls, feeder pillars and street lighting isolators, is pleased to announce its street light cut outs (SLCOs) are now part of the G81 specification framework, won by Lucy Group for industrial and commercial underground connected loads up to and including 11kV.

WPD exclusively specifies a number of Lucy Group secondary power distribution solutions throughout the East and West Midlands, South West and Wales regions.

The updated specification means that Lucy Zodion’s street lighting cut-outs are now approved by every Distribution Network Operator (DNO) throughout the UK – the Lucy Titan range of cut outs include several market-leading design features such as the cam lever handle that enables effortless release of the fuse carrier in one movement or the generous cabling space to terminate a wide variety of conductor types and sizes. Where dual or triple cable entries are required, a choice of either insulated or brass cable gland plates is available, the latter being specifically provided for the termination of armoured SWA cables.

➡ For further information about how Lucy Zodion provide control and power distribution products for street lighting applications, please review the Lucy Titan (Cut-outs) and Lucy Trojan (Isolators) ranges of products.

Should you require any technical support or have any commercial requirements about G81 Approved 11kV/33kV Cables & Accessories please do not hesitate to contact Thorne & Derrick Sales Team.

Lucy Titan2 Street Lighting Cut Outs

Furthermore, Western Power Distribution (WPD) specifies Lucy Zodion SLCOs onto contract for exclusive use within their region.

The G81 standard included cut-outs for street lighting control are:

• Lucy THM0048847 SLF IPC Type 1 Cut Out (SNE) HEX Drive Clear Cover
• Lucy THM0041767  SLF IPC Type 2 Cut Out (CNE) HEX Drive Clear Cover

Lucy Zodion is one of the UK’s leading manufacturers of street lighting cut outs and is dedicated to adhering to industry standards, as well as its own quality procedures.

Lucy Zodion’s SLCOs are compliant with BS7654, which covers all aspects of the cut out from the materials in which it is manufactured, to a series of tests relating to temperature, ingress protection, current and mechanical strength.

Other features of the approved products include clear covers, enabling quick and safe inspections, Insulating Piercing Connectors (IPC) to protect against insulation shrink back, as well as many more high quality benefits associated with the Lucy Zodion SLF range.

Street Lighting Cut Outs | Isolators | Feeder Pillars

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 HV 

3M Scotchcast Cable Joints – Your Cable Circuit Is Only As Strong As Its Weakest Link

3M Scotchcast Resins – Powerful Cable Joints

uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager

Selection Factors, Specification Considerations & Application Notes

Why Gamble With Your Power Supply By Installing Underspecified Cable Joints?

A Failed Cable Joint

Since 1985, Thorne & Derrick International, have stocked and distributed 3M Scotchcast cable joints renowned for their field service record and dependability for the connection and repair of existing damaged cables or the extension or diversion of new cable installations.

Whether XLPE, EPR, PILC or other cable type, Scotchcast joints are the preferred option for LV power, instrumentation or control cables.

The primary purpose of any LV cable joint is to remove a damaged or faulted section of cable and re-instate the electrical performance of the jointed cable as closely as possible to the original manufactured condition.

The specification, selection and installation of Low Voltage Resin Cable Joints varies according to industry. So, without a universal methodology the selection factors are usually specific to the cable and industry. Several key factors include : cable function, cable reliability, installation application and consequential loss due to outage or downtime.

Standard resin cable joints are often inadvertently installed forming weak links in many industrial cable networks.

Scotchcast Joints

Whether by Land, Air or Sea

3M Scotchcast resin cable joints provide reliable and safe performance in the construction, rail, renewable, airfield lighting, port authority, offshore, marine, mining, utilities and hazardous area (oil, gas and petrochem) industries.

“Scotchcast” has now become a byword for cable joints.

Scotchcast resins are synonymous with reliability, quality and dependability when jointing cables, whether above or below ground – a comprehensive range of jointing resins have been developed by 3M with fire resistance, flame retardant, low smoke zero halogen and hydrocarbon resistant performance.

Deep Underground 

3M Scotchcast 82-F cable joints are specified for the straight and branch jointing of flexible mining and trailing cables. Utilising flame retardant and flexible 3M Scotchcast 2131 resin with Mine Safety and Health Administration (MSHA) Acceptance 07-KA060002-MSHA.

3M 82-F flexible cable joints do not impair the bend radius of frequently coiled cables – the submersible cable joints are also seawater resistant for connecting cables by divers to ROV (Remotely Operated Underwater Vehicles).

♦ Further Reading : Top 10 Deepest Mines In The World

Seeing Beyond The Surface – Worker & Site Safety With 3M Cable Joints

The World’s Biggest Coalmine : Peabody Energy’s operations in the Powder River Basin of Wyoming USA. 40% of America’s coal comes out of the North Antelope Rochelle Mine. Photograph: Mae Ryan for the Guardian

Offshore Cable Joints

3M Scotchcast resin cable joints are specified by the global oil and gas exploration companies for the low voltage jointing of power, instrumentation and control cables.

3M LVI3 resin cable joints suit offshore and marine power, instrumentation and control cable (BS6883, IEEE, UL, UK00A, NEK606 BFOU RFOU types) and instrumentation cable (pair, triple, quad types) – typically used to joint and connect cables in Zone 1 and Zone 2 hazardous areas to provide low voltage electricity distribution to power and lighting in potentially explosive atmospheres.

3M LVI3 joints are hydro-carbon resistant based on the specification performance of 3M Scotchcast 1402FR and resist degradation by drilling fluids (mud) – the ability of offshore topside and shipboard cable joints to withstand degradation by hydro-carbons and drilling MUD is vital avoid potential cable faults.

3M : Specified By Global Oil & Gas Industry

Repairing Damaged Cables

Cable damage is common offshore due to the extreme mechanical conditions caused by vibration, shock and movement on oil and gas platforms.

Overtime, EPR type rubber cable sheaths are degraded and complete cable change-out can be cost prohibitive or actually impossible.

3M LVI cable joints provide an excellent cable repair or full cable joint to damaged offshore cables preventing possible downtime caused by cable failure due to salt sea atmospheres reacting with cable braiding and conductors and causing a short circuit.

The wrap-around or snap-on 2 part type cable joint moulds permit mid-span cable repairing or jointing without requiring cable disconnection from the remote end – refer to our recent post about repairing damaged cables for further information and solutions including use of cold shrink tubes.

3M Cable Joints are installed on offshore oil and gas platforms, FPSO’s, FPS’s, oil tankers and carriers

With You In The Cable Trenches

Image : Lovink.

Bent double in a muddy hole in the ground wrestling with a post-war imperial PILC cable.

And if you’re cable jointing in the UK then it’s probably raining.

We know the score. Hence, 3M cable joints are designed by jointers for jointers.

Large shell 3M cable joints enable crimping tool access or mechanical shearbolt connector compatibility for simplified cable jointing in tight access cable trenches and cable containment.

Cross core and transition cable jointing of multi-core XLPE to PILC is enabled.

Strong impact resistant cable joints shells withstand trench backfill. Often sand backfill can be mixed with sharp stones, clay and organic detritus.

3M can cope.

Size Matters

The internal working space permitted by the cable joint shell design impacts upon the ability of the LV cable jointer to work comfortably and safely often in tough site conditions.

Ample work-room enables efficient and reliable armour bonding, cross-core jointing, transition jointing and conductor connecting.

Large cable jointing shells enable the use of mechanical shearbolt connectors, such as Pfisterer Sicon, ideal for imperial-metric-AWG connections and hydraulic crimp tool heads where close quarter working is needed.

Is The Cable Joint Shell Large Enough For The Crossing Of Phased Cores?

Whatever the Weather

Cable damage is common offshore due to the extreme mechanical conditions caused by vibration, shock and movement on oil and gas platforms. Challenging offshore weather conditions vary from brutal hurricanes in the Gulf of Mexico to violent Atlantic nor’easters.

Closer to home, the North Sea UK continental shelf regularly experiences violent Force 10 storms inflicting extreme wind and wave effects on offshore assets.

3M Scotchcast Standing Out From The Crowd

3M Scotchcast low voltage cable joints are designed to ensure the installation process is simpler, quicker and safer.

Some selection and specification considerations :

• Safety – 3M’s unique Advanced Delivery system provides integrated resin pour for the cable jointer eliminating vapour inhalation or direct skin contact
• Simplicity – one part, wraparound cable joint shell enables rapid installation. Reduced man-hours cuts installed cost and drives labour productivity gains often during tight time schedule shutdowns
• Reliability – eliminate or minimise cable faults

Specify and buy 3M Scotchcast cable joints for first class safety and service record without any hidden dangers.

3M Scotchcast Resin Advanced Delivery

 Just How Do 3M Do It?

• Single Piece Cable Joint Mould Shell – simpler installation process for the cable jointer. No cutting or sawing cable mould to size. Range taking foam seals at the ends of the cable joint shells provide an excellent tight and reliable seal – this adaptable 3M cable sealing system eliminates the need for the cable jointer to cut and tape the joint shell to size. Folding cable mould meets at the top of cable joint, not along both sides reducing potential resin leakage paths. 3M cable joint moulds resist cracks or breaks even at low temperatures. Suitable for direct burial.

Why Don’t I Need To Cut 3M Cable Joint Shell To Fit The Cable?  

• Earthing – 3M’s robust armour continuity earthing system suits both wire armoured (AWA single core and SWA multi-core), wire braided (copper and phosphur bronze) and lead sheathed cables. To avoid awkward manipulation of armour wires while trying to fit worm drive clips over the cable support rings, 3M have chosen to use constant force springs for earthing. Constant force springs offer significant advantages over “single wire type” earth continuity systems, which can fail if poorly positioned within wire armour cores that have “spread”. The flat soft copper earth braid ensures good electrical contact.

Safe & Sound With Constant Force Springs : Cable joints move and expand due to earth shift and heat from electrical current. Constant force springs react to this movement and maintain a sound electrical connection between the steel wire armouring and the earth continuity braid

• Mechanical Connectors –  fast, simple and range-taking conductor jointing of copper and aluminium conductors, whether stranded, sectoral or solid. Suits jointing of metric, imperial and AWG conductors.

• Resins – high quality cable jointing resin with good moisture resistance and always enough in the joint kit for the application. No need for “topping-up”.

1. Scotchcast 1402FR Resin,  Halogen Free – for public areas where fire, smoke and toxic fumes potentially threated lives and equipment
2. Scotchcast 1402FR Resin, Hydrocarbon Resistant – suit air exposed and contaminated ground installations
3. Scotchcast 2131 Resin, Seawater Resistant – salt water solution resistant to ISO 175

Did You Know?

3M Scotchcast resin cable joints, typically used for 600/100 volts cables, can be up-rated for 3.3kV cable jointing.

3M Scothcast Premium Low Voltage Inline Resin Cable Joint

THORNE & DERRICK SPECIALIST ELECTRICAL DISTRIBUTOR

LV ♦ MV ♦ 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, switchgear 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.