Blog

Fireproof Cable Joints For BS7846 Fireproof Mains & Control Cables (LSZH)

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

BS7846 Cables

Thorne & Derrick International distribute fireproof cable joints for LV Low Voltage fire resistant armoured (SWA) power cables to British Standards BS6387 and BS7846.

The BS7846 British Standard enhanced fire performance cable is specified for fire alarms and emergency lighting in both indoor and outdoor installations – general fire resistant power cables are used to protect emergency plant including sprinkler pumps, smoke extractors and fire dampers.

The British Standards

BS6387:2013 : Test Method For Resistance To Fire Of Cables Required To Maintain Circuit Integrity Under Fire Conditions.

BS 7846:2015 : Electric Cables. Thermosetting Insulated, Armoured, Fire-Resistant Cables Of Rated Voltage 600/1000 V For Fixed Installations (having low emission of smoke and corrosive gases when affected by fire).

BS7846 Cable Construction

BS7846 Cable Core Identification

BS7846 Cable Fire Resistance Categories 

The cables under the British Standard are categorised according to their special fire resistance characteristics:

Fire Resistant Armoured Power Cable For Essential Services

BS7846 fire resistant cable manufactured by Prysmian features a plain annealed stranded copper conductor, XLPE insulation, MICA fire resistant tape, polyester tape low smoke zero halogen bedding, fire barrier tape and black low smoke zero halogen outer sheath with a galvanised steel wired armour (SWA).

Low smoke zero halogen (LSZH) heat shrink cable joints with additional fireproof or fire resistant properties are available – typically used to connect, repair or joint Prysmian FP600S or Prysmian FP400 cables. The cable joints feature low smoke and corrosive gas emissions (LSOH) and are moisture resistant with LUL Approvals.

See also : Low Smoke Zero Halogen (LSOH) Cable Accessories

• BS6387/BS7846 Cable Enhanced Fireproof Mains Cable 

2, 3 & 4 Core 4sqmm – 400sqmm. Plain annealed stranded copper conductor, mica fire resistant tape, XLPE insulated, polyester tape, low smoke zero halogen (LSZH) bedding, fire barrier tape, galvanised steel wire armour, low smoke zero halogen (LSZH) outer sheath. Sheath Colour Black. 600/1000 grade volts.

Manufactured to meet the following standards – circuit integrity: BS8519-2010 120 minutes/BS8491, acid gas emission to IEC 60754, BS EN 50267, flame propagation to IEC 60332-3, BS EN 50265, BS EN50266 and smoke emission to IEC 61034, BS EN 50268.

Cable Joints

SPS fireproof cable joints utilise LSF zero halogen heat shrink tubes and fire barrier tubes – the joints incorporate mica tape over each of the conductor cores. Micaca tape is a slit silica tape constructed from 96% pure silica fibre, coated one side with a pressure adhesive backing that facilitates installation of the joint kit.

➡ Watch the Installation Video for Fire Resistant & Zero Halogen Cable Joints HERE.

Fire resistant cable joints ensure vital emergency circuit integrity in fire conditions – cable joint kit contents include fire protection sleeve, stainless steel clamping spring, inner and outer sealing sleeve, tinner copper earth braid, tinned copper earth mesh, insulation tubes, mica pads and crimp ferrules.

LONDON UNDERGROUND APPROVED

Developed specifically for London Underground Limited (LUL) and for use within underground rail tunnels and above surface at platform and station level, the low smoke zero halogen cable joint incorporates flame retardant, non halogen polyolefin heat shrink tubing with a meltable inner liner providing excellent flame retardant properties with reduced acid gas emission and smoke generation.

A complete range of multicore and multipair cable joints are available with LU approval for rail power, signals and telecoms cables.

London Underground Cable Joints

Fire Resistant Cable Accessories

Thorne & Derrick International distribute the complete range of Fire Resistant Cable Accessories to preserve and power low voltage electrical systems without compromising the manufacturing standards according to BS7846 – complete ranges of cable clips, cleats (including claw cleats) and glands are also available to support the installation of Prysmian FP specification cables.

Cable Breakouts | Cable Caps | Cable Lugs | Cable Cleats | Cable Trough | Cable Duct | Feeder Pillars | for 11kV/33kV/66kV networks see MV HV Joints & Terminations

Prysmian JEM Resin | Cable Jointing Resins LV MV HV

Cable Jointing Resins

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

Prysmian JEM Resin

LV MV HV Cable Jointing Resins

Prysmian JEM Resin was developed to meet the growing concerns regarding Jointer exposure to isocyanates in the workplace, especially when using cable joints for jointing utility cables in confined spaces and cable trenches with inadequate ventilation.

JEM Resin developed by Prysmian is a non-isocyanate cable jointing resin with all the technical performance characteristics of conventional jointing resins but with additional features and benefits for the encapsulation of LV, MV or HV joints typically operating at 600V/1000V, 11kV and 33kV.

Changing Legislation For Cable Joint Resins

From December 1st 2010 cable jointing resins containing MDI (Methylene diphenyl diisocyanate) are re-classified as Carcinogen Category 3, suspected of causing cancer and will carry new labelling to this effect.

Subsequently, Prysmian is advising utilities, cable jointing contractors and specifiers to adopt a “Substitute it Now (SIN)” philosophy when it comes to choosing which resin products to use for jointing cables.

This applies to the vast majority of cable jointing resins on the market, except for Prysmian’s JEM resin cable jointing solutions which are 100% MDI free and present none of the health and safety risks associated with other jointing resins containing hazardous chemicals. From December 1st all Prysmian resin cable joint kits will be JEM resin only.

JEM Resin Pack Quantities & Order Codes

Contact Thorne & Derrick Sales for stock availability and current pricing for JEM: 

Cable Jointing Resins. Joint Encapsulating Material (JEM).

Prysmian JEM Resin Cold Pour Compound Features & Benefits

• Low viscosity resin (very searching, no voids, easier mixing by the Jointer)
• Easy mixing by the Jointer at low ambient temperatures (e.g. -15°C)
• Curing reaction not sensitive to moisture (will cure underwater and in wet cable trenches or joint holes)
• Filled cable joints with Prysmian JEM resin may be energised immediately if undisturbed
• JEM resin supplied in clear pouches which allows mixing to be observed in process
• Excellent adhesion to XLPE, PVC, Lead type cables
• Type approved in LV cable joints (ENA TS C81/3 and BS EN 50393)
• Cable jointing resin is tested in accordance with HD631.1
• Re-enterable cable jointing compound resin version available

➡ Watch & Learn from this video by Prysmian Group on how to Mix, Pour & Deliver the JEM range of cable jointing resins:

Prymsian JEM Resin

Prysmian JEM Resin

Performance Data

Prysmian JEM Resin

Cold Pour Compound Mixing Instructions

The Jointer must take care when mixing the JEM Resin prior to pouring into the cable joint shell or mould.

Step 1:  Open container and remove JEM Resin Kit. The Jointer should check the resin bag for any signs of damage before proceeding	Step 2: Aerate the powder by gripping the pouch at each end and tumbling the powder for up to thirty seconds, this will facilitate mixing of the JEM Resin
Step 3: To start the mixing process, hold the JEM Resin bag as shown above, so that the liquid is forced onto the powder	Step 4: Squeeze the liquid through the membrane seal and onto the powder
Step 5: Make sure that the membrane seal is completely open before mixing the powder and liquid together	Step 6: Before mixing the Jointer should rotate and shake at the corners to free the powder
Step 7: Tumble mix and knead the JEM Resin bag for up to two minutes, to ensure that there are no lumps in the bag	Step 8: Finally cut one corner and pour the contents into the cable joint shell

Customer Question…

“I’m supervising electrical connections on Scottish Power’s LV network – service joints of varying types. We have a cable jointer query regarding curing time of the Prysmian JEM resin you supply which I need to get completely right. Many cable jointers say leave the joint for 24 hours to cure, some say 2 hours. What is your standard curing time for service joints? Let’s assume it’s a single phase service off a 300sqmm PILC cable. Please bear in mind that we want to backfill and compact the joint bay in order to reinstate the joint bay, so assume we’re using a rammer. Obviously we will not backfill/reinstate if it compromises the cable joint’s integrity, however, we do have pressures to reinstate said joint bays as soon as possible.

Prysmian Answer…

“Full cure is not achieved for 24 hours but Prysmian JEM resin joints can be energised immediately provided they are not being moved.”

Cable Jointing Resins

3M Scotchcast resin insulated cable joint kits are designed for indoor, outdoor (weather exposed), direct buried or submersed applications.

3M brand Scotchcast Resins are 100% solids, electrical grade, hydrolytically stable insulating resins. The unique electrical and physical properties of 3M Resins make them ideal for insulating and protecting electrical/ electronic parts and assemblies. Their physical features also make them suitable for non-electrical, general use applications, for example as adhesives or sealants.

A Safe, Clean, Simple & Reliable Joint Solution

• High quality range of cable jointing resins for low and medium voltages
• Unique Patented Close Mixing and Pouring (CMP) system from 3M Electrical
• Transparent Mould for better control of the job by the Jointer
• Resin packed in transparent 2-chamber mixing bags for delivery into the cable joints
• Cable jointing resins with approvals according to VDE 0291 part 2

♦ G38A Compund | Prysmian BICC Cable Joint, Termination & Cable Box Filling Compounds

Polyurethane | Hydrocarbon Resistant | Re-enterable | Submersible | Scotch Tapes

3M Cold Shrink Cable Abandonment Kit – Selection Guide

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

Cable Abandonment

Thorne & Derrick International, the UK’s leading distributor and largest stockist for 3M Hazardous Area & Cold Shrink Cable Accessories have despatched over one thousand 3M CSCAK abandonment kits to the North Sea Forties Pipeline System and Kinneil Terminal.

3M CSCAK cable abandonment kits are used to safely decommission redundant LV low voltage power cable circuits in the oil, gas and petrochemical industry.

3M Electrical cable abandonment kits using Cold Shrink, are suitable for Zone 1 and Zone 2 hazardous area electrical installations without need for heat shrink, “hot-working” and naked flames in potentially explosive environments – CSCAK abandonment kits suit EEMUA 133 XLPE lead sheathed power cables (600/1000v and 3.3kV) for safe installation in hazardous area locations according to the ATEX Directive.

3M Cold Shrink Cable Abandonment Kit

Cold Shrink product features at a glance :

• Simple and quick to install – no heat shrink torches or heating required to install cold shrink abandonment kits
• Permanent cable abandonment for LV power cables
• No requirement for additional mastic tapes or greases
• No hot work permits required for hazardous area locations (HAZLOC) or potentially explosive atmospheres
• Widely used in onshore and offshore environments, including hazardous area locations Zone 1 & Zone 2
• 3M Cold Shrink rated up to and including 1.9/3.3kV

3M Cable Abandonment Kits suit XLPE/PVC Insulation, Lead Sheath, Steel Wire Armour, PVC Sheathed – including Shipwiring cables (EPR GSWB Wire Braided) and Unarmoured cables up to and including 3.3kV single and multi-core cables.

CABLE ABANDONMENT KIT LIST

The cable abandonment kit uses a 3M Cold Shrink cable end cap, pre-stretched cold shrink tubes, Scotch 2228 Mastic Tape, Scotch 23 Self Amalgamating Tape and Scotch 24 Electrical Shielding Braid (tinned copper mesh tape) and constant force springs.

Cable Abandonment Kits

Cable abandonment kits are often used when cable is left underground but it is not intended to be left live. If by mistake it has power connected to it, the cable abandonment kit is designed to create a short circuit to earth so that it will trip out, thus it will render the circuit dead to enable the engineer or cable jointer to realise power was switched to it by mistake.

In this design by 3M Electrical, there are no provisions for stress control tapes or systems and screening because it is just not meant to be left live.

The range-take of 3M CSCAK Cold Shrink products according to both outside cable diameters (around outer cable sheath) and conductor cross section areas (core) for both single and multi-core cables are as follows:

• 3M Cold Shrink Cable Abandonment Kit – 12 to 18mm Dia – 3M CSCAK-1
• 3M Cold Shrink Cable Abandonment Kit – 18 to 25mm Dia – 3M CSCAK-2
• 3M Cold Shrink Cable Abandonment Kit – 25 to 42mm Dia – 3M CSCAK-3
• 3M Cold Shrink Cable Abandonment Kit – 42 to 55mm Dia – 3M CSCAK-4
• 3M Cold Shrink Cable Abandonment Kit – 56 to 81mm Dia – 3M CSCAK-5

CABLE ABANDONMENT KIT SELECTION TABLE

Why Play With Fire? Keep Your Cool with 3M Cold Shrink……

Heat shrink cable joints, terminations and cable accessories require naked flames.

But hot-working poses serious dangers with respect to ignition sources in industrial and hazardous areas – air, naked flames and the presence of atmospheric combustible substances trigger the Ignition Triangle.

Install 3M Cold Shrink for a first class safety and service record without any hidden dangers.

3M Cold Shrink products include cable joint kits, cable termination kits, cable abandonment kits and cold shrink tubing – extensively specified for offshore oil, gas, petrochemical, rail, utility and construction projects at low and high voltages.

Video : 3M Cold Shrink Cable Abandonment Kits  ➡ 

  Should you require customer service or technical support on the selection or specification of LV MV HV Cable Accessories please contact us – view the full range of 3M Cold Shrink Cable Abandonment Kits below.

Cable Joints For Low Voltage Cables

Thorne & Derrick stock and distribute LV Joints in Cold Shrink, Heat Shrink or Resin Cast technologies – multicore and multi-pair cable joints are available for immediate backfill and energisation of Low Voltage power, control and instrumentation cables 600V/1000V 3.3kV.

Complete range of LV Cable Accessories  ➡

Cable Breakouts | Cable Caps | Cable Lugs | Cable Cleats | Cable Trough | Cable Duct | Feeder Pillars | for 11kV/33kV/66kV networks see MV HV Joints & Terminations

Pfisterer | Nexans Euromold | Prysmian | Cable Joints & Terminations MV HV

Cold Shrink by 3M | Joints | Abandonment | Terminations | Low Voltage LV Cables

3rd Arc Flash & Isolation Safety Conference in Manchester on May 21st & 22nd 2019

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

Arc Flash

The objective of the Arc Flash & Isolation Safety Conference is to provide the industry with the latest developments and best practice to deal with arc flash hazards and isolation safety issues. You will have a chance to discuss your electrical safety issues with our speakers, and gain practical applications to improve arc flash and isolation safety in your workplace.

The focus throughout is on the experiences of end users.

The Arc Flash Conference will be attended by those who are interested in technical solutions to their arc flash and isolation issues, industry trends, standards developments and new techniques to handle existing electrical safety threats.

➡ For more details download the event brochure HERE or register online HERE.

Technical Topics Include

• The human factor in electrical safety – ways to reduce error and improve performance
• Arc flash risk assessment from a UK Perspective – what’s new?
• Building and implementing a flame resistant/arc-rated program for arc flash hazard
• Arc flash in the maritime industry – case study of arc flash hazard and risk mitigation
• Internal arc classification according to IEC 62271-200
• How to make LV switchgear assemblies safer according to IEC 61439
• Gaps in electrical training and the safety implications of this related to arc flash
• Arc flash PPE – do you or don’t you need it?
• Arc flash risk assessments – A case study from Sweden´s largest nuclear power plant
• The anatomy of arc flash PPE
• IEEE 1584 Guide for Performing Arc Flash Hazard Calculations
• Three case studies looking at the practicality of arc flash risk assessment in the workplace
• Selection of PPE – practical experience of different arc assessment methods

Arc Flash Clothing | Polo Shirts | Jackets | Trousers | Sweatshirts | Helmets

Legal Responsibility & The Electricity at Work Regulations By Anthony Smith

This presentation by Anthony Smith (CEO – Lantei Compliance Services & The Electrical Safety Network) will focus on the legal requirements related to the maintenance of LV MV HV electrical installations, systems and equipment. It will cover issues raised in the IET Code of Practice for Electrical Safety Management, the latest legislation and regulations including the Electricity at Work Regulations 1989 and the Health & Safety at Work Act 1974. The aim of this section is to help duty holder’s work towards some element of clarity and simplicity whilst maintaining compliance in the workplace, a must for all those serious about electrical safety in the workplace. See Session 14 in the Event Document.

LV MV HV Voltage Detectors | Portable Earthing | Insulating Sticks | Insulating Gloves | CATU Electrical Equipment – Largest Stocks In UK & Europe from THORNE & DERRICK

Arc Flash Conference Highlights Day 1

• Meet International Keynote Speaker Jim Pollard  - Arc Flash Expert, Arc-Rated PPE (Unlimited PPE Inc)

• The Human Factor In Electrical Safety - Ways To Reduce Error & Improve Performance by Jim Pollard

• Arc Flash Risk Assessment From A UK Perspective - Whats New by John Maplesden

• Building & Implementing A Flame Resistant/Arc Rated (FR/AR) Program For Arc Flash Hazard by Derek Sang

• Arc Flash In The Maritime Industry - Case Study Of Arc Flash Hazard & Mitigation Through System Design On A New Build Vessel by Shaun White

• International Arc Classification According To IEC62271-200 by Andy Seccombe

• How To Make LV Switchgear Assemblies According To IEC61439 Safer by Lutz Graufmann

• Gaps In Electrical Training & The Safety Implications Of this Related To Arc Flash by Kevin Hann

• ARC Flash PPE - Do You Or Don't You Need It? by Anthony Long

• Arc Flash Risk Assessments - A Case Study From Swedens Largest Nuclear Power Plant by Thomas Winter

Arc Flash Conference Highlights Day 2

• The Anatomy Of Arc Flash PPE by Jim Pollard

• IEEE 1584 Guide For Performing Arc Flash Hazard Calculations by Alan O'Kelly

• 3 Case Studies Looking At The Practicality Of ARc Flash Risk Assessment In The Workplace by Pay Mynett

• Selection of PPE - Practical Experience & Comparison Of Different Arc Assessment Methods by Thomas Jordan

• Duty Holder Responsibility by Anthony Smith

Book Online & Register Here

Download the full event brochure HERE.

Register online below ▼ or email your registration form to [email protected]. If you experience any difficulties, please email or call the UK office on +44 (020) 8335 4014.

Arc Flash Conference Registration Form & Download

The Gains 

• Learn about UK, EU and international standards developments in arc flash
• Hear case studies detailing the latest arc flash mitigation strategies and solutions
• Define what personal protective equipment (PPE) is required on your site
• Understand how to achieve a compliant and electrically safe work place
• Learn about the recent updates to NFPA 70E 2012, CSA Z462, BS7671 and IEEE 1584
• Clearly understand what an arc flash is and the potential injuries it can cause
• Learn about electrical safety statistics and the implications for you
• Detail the steps to perform an arc flash hazard analysis
• Understand practical considerations for PPE selection, testing and maintenance
• Learn how to provide arc flash training for your staff
• Network with specialists in the field and your peers
• No sales pitches – non-commercial presentations

Who Should Attend?

• Electrical Technicians, Engineers and Managers
• Engineering Managers
• Risk Assessors
• Design Engineers
• Manufacturers of PPE & Safety Equipment
• Safety Facilitators
• Instrumentation & Control Technicians and Engineers
• Process Safety and Loss Prevention Managers
• Government Safety Regulators/Inspectors
• OHS/Training Managers
• Tradespersons working in potentially explosive areas

Conference Particulars

Arc Flash Statistics

• 30,000 Arc Flash Incidents per year
• 7,000 Burn Injuries per year
• 2,000 Hospitalisations per year
• 400 Fatalities per year

“30,000 Arc Flash Incidents per year” Source: ISHN

 ➡ DISCOUNTS – We are offering a 10% off early bird discount until April 23rd (SAVE £75 per person) plus a 3 for 2 offer – register 3 delegates and only pay for 2 (SAVE to £750). Discounts are applied at online check-out.

Thorne & Derrick’s POWER Blog is regularly updated with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.

➡ View T&D’s brochure – contact our Sales Team with your requirements.

We focus on 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 

We provide guidance and technical support for the installation of LV, MV & HV Cable Joints, Terminations, Substation & Electrical Equipment from our Key Suppliers including:

Our Jointers Photo Blog features contributions from our social network of utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.

thornendderrick.com

Filoform Cast Resin Cable Joints For Cathodic Protection

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

Cathodic Protection Cable Joints

Cathodic protection is a technique that is used to protect a metal structure from corrosion under water by acting like an electrical cathode. A simple method of protection connects the metal to be protected to a more easily corroded “sacrificial metal” to act as the anode.

Thorne & Derrick, a leading distributor for Filoform cable joints, have this week supplied 300 off Filoform CPJ95 Cathodic Protection Joints to the oil and gas industry.

Filoform CPJ cable jointing kits are used on cathodic protection applications including pipelines, tanks and buried structures. The CPJ joints can be supplied with or without brass line taps as standard – this range of cable joints suit mains cable single core maximum size up to 120sqmm and branch single core cables up to 35sqmm.

Two variants of Filoform CP cable joints are offered:

CPJ – The classic cathodic protection joint for use when upright branch joints are required

CB0 – A “Y” shaped joint for horizontal branch jointing applications

Image: Hubbell

Filoform Cast Resin Cable Joints

Features & Benefits

• Strong clear plastic mould body with Snaplock connection for tight seal
• Stepped cable entry cut off points for all cable diameters
• Large mould shell enables crimp or split bolt / line tap connectors to be used
• High quality resin sealing compound has a high resistance to moisture absorption, is mixed in a clear pack and stored in an aluminium protective bag.
• The long term electrical properties of the resin sealing compound result in a more reliable connection without any associated maintenance costs
• Resin sealing compound is suitable for all climate conditions
• Designed to meet the requirements of BS 7888:1998
• Specified by leading oil, gas and water companies and consulting engineers
• Used extensively on rail projects

Filoform CPJ95 cable joint is designed to suit mains cable single core maximum size up to 95sqmm and branch single core cable up to 35sqmm.

Typical applications include for cathodic protection cables and cable joints :

• Pipelines – oil, gas, product, water
• Above ground and underground storage tanks
• Well casings
• Sheet and cylindrical piling – land and marine
• In plant pipe work
• Compressor stations

Pictured : Filoform Cable Joint (Cathodic Protection) – cable joint kit includes mould, jointing resin, sealing tapes and mechanical connector for conductor connecting.

Filoform CPJ Cable Joints – Mixing Instructions

Care should be taken by the Jointer to ensure the cable jointing resin is mixed thoroughly and in accordance with the manufacturers guidelines:

1. Remove the aluminium outer bag taking care not to damage the clear inner bag. Immediately use the cable jointing resin after opening the aluminium outer bag

2. Remove the separator from the centre of the resin bag

3. Mix contents by kneading vigorously for at least two minutes. Make certain all the resin cable compound is squeezed from the corners and edges of the bag.

4. Pouring of the resin: Cut a small edge from the bag. Carefully pour the resin into the joint shell. Empty (hardened) resin packs can be disposed as regular waste material.

Attention:

• Do not mix different types or brands of cable resins
• Take steps to prevent damage as a result of spilling resin
• Wear disposable gloves and process only in a well ventilated room

Typical Applications for

Cathodic Protection Cable Joints

• N2XY XLPE/PVC 600/1000v
• XLPE/XLPE
• N2XRY XLPE/SWA/PVC
• HMWPE
• KYNAR/HMWPE
• HALAR/HMWPE

LV Cable Joints (Low Voltage Cables)

Thorne & Derrick stock and distribute LV Joints in Cold Shrink, Heat Shrink or Resin Cast technologies – multicore and multi-pair cable joints are available for immediate backfill and energisation of Low Voltage power, control and instrumentation cables 600V/1000V 3.3kV.

Complete range of LV Cable Accessories  ➡

Cable Breakouts | Cable Caps | Cable Lugs | Cable Cleats | Cable Trough | Cable Duct | Feeder Pillars | for 11kV/33kV/66kV networks see MV HV Joints & Terminations

Cold Shrink by 3M | Joints | Abandonment | Terminations | Low Voltage LV Cables