Cable Cleats

Cable Cleats | Importance, How To Specify & International Standards

What Are Cable Cleats?

“A cable cleat is a device designed to secure electrical cables when installed at intervals along the length of the cables” – IEC 61914 Cable Cleats for Electrical Installations

“Cable cleats should:

Prevent excessive cable movement due to fault-current magnetic forces

Be rated for specific cable size and available current.”

The fifth edition of API Recommended Practice 14F (Design, Installation and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities).

“Single core electric cables are to be firmly fixed, using supports of strength adequate to withstand forces corresponding to the values of the peak prospective short-circuit current.” – Lloyds Register. Rules and Regulations for the Classification of Ships, Part 6, Control, Electrical, Refrigeration and Fire.

“Cables are to be installed and supported in ways to avoid chafing and undue stress in the cable.” – ABS Steel Vessel Rules 4-8-4/21.9 Cable Support, 4-8-4/21.9.1 General and 4-8-4/21.9.3 Clips, Cable Saddles, Straps

“In order to guard against the effects of electro dynamic forces developing on the occurrence of a short-circuit or earth fault, single core cables shall be firmly fixed, using supports of strength adequate to withstand the dynamic forces corresponding to the prospective fault current at that point of the installation.” DNV Rules for Ships / High Speed Light Craft and Naval Surface Craft, Pt. 4 Ch. 8 Sec.10 – page 68, C50

ALWAYS REMEMBER: Any power cable system designer or installer has an obligation to consider the method of securing cables in order to restrain their movement whether caused by an electrical fault or any other reason – a job that can only be safely and securely done with correctly specified cable cleats.

1. Calculate the system peak fault current
2. Identify the specification of the cable to be used including the nominal cable diameter and the manufacturing tolerance
3. Identify the support structure type e.g. Ladder ( including rung spacing), basket, individual steel structure etc
4. Consider support structure material type e.g. stainless steel, galvanised steel etc
5. Consider the environmental conditions
6. Consult with Ellis Patents who will provide you with the most cost effective solution for your needs

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WHAT IS THE INTERNATIONAL STANDARD FOR CABLE CLEATS?

IEC 61914 Cable cleats for electrical installations outlines a series of tests that can be used to assess the performance of a cable cleat’s design.

Although the standard does not define pass or fail levels, it allows manufacturers to define the performance characteristics of their products, and specifiers to compare products from different manufacturers.

The aspects of construction and performance covered by the standard include:

• Material type – i.e. metallic, non-metallic or composite
• Minimum and maximum declared service temperatures
• Resistance to impact at the minimum declared operating temperature
• The ability of the cable cleat to withstand axial slippage forces
• Resistance to electro-mechanical forces – i.e. the ability of the cable cleat to withstand the forces between the cables in the event of a short-circuit
• Resistance to UV and corrosion
• Flame propagation

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TRANSPORT FOR LONDON PROJECT

Working with Ellis Patents we completed the specification and have now moved into manufacturing for our largest contract to date to supply TfL (London Underground) approved cable hangers across several depot modernisation projects.

Thorne & Derrick in consultation with the Asset Manager at Transport for London and their appointed Telecoms & Power contractor secured formal Authorisation & Approval for the Pegasus range of non-metallic cable support hangers. The product will provide safe cable management of the cable route within the Bridges & Structures category – over 1000 hangers with proven lifecycle performance and utilising the standard J-type design for support of multiple cable runs including single, 3-way and 5-way configurations are now scheduled for delivery.

Thorne & Derrick are Approved Vendors to both Network Rail and Transport for London

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THORNE & DERRICK

Thorne & Derrick 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 installation and maintenance of low/medium and high voltage power systems:

• 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

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 

Cable Cleats | A Device For Short Circuit Protection | CPD Course By Ellis Patents

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Cable Cleats

A Device For Short Circuit Protection

Ellis Patents, the world’s leading cable cleat manufacturer, has launched its UK accredited Continuing Professional Development (CPD) course – developed in-house, their online CPD course has helped educate thousands of engineering professionals from around the world.

“Cable cleats: a device for short circuit protection” is a NBS RIBA accredited course designed to provide technical insight and guidance that has been adapted for international use and is available through Ellis’s e-learning portal.

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➡ FREE CPD Course By Ellis Patents

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FREE CPD Course Contents

Cable Cleats CPD Course Content

Module 1 Introduction

“I found the Ellis Cable Cleats CPD kept my interested, it was very informative and professionally put together.”

Jon Watkins (Electrical Engineer – Kier Construction)

In this video Ellis Patents compare using Stainless Steel Cable Cleats and Stainless Steel Cable Ties – the Ellis cable cleats are used to restrain power cables on slotted rung cable tray and are short-circuit tested to 59kA RMS, 118kA Peak for 0.1 second duration.

SHORT-CIRCUIT TESTING

There is a major difference between the short-circuit withstand requirements of a cable and the short-circuit withstand of a cable cleat.

The former is concerned with cable degradation as a result of temperature rise (thermal stress heating), while the latter is concerned with cable retention as a result of electromechanical forces.

Typical installation specifications that have been derived from the thermal withstand of the cable would require a short-circuit withstand of 63kA for 1 second or 40kA for 3 seconds.

A short-circuit test for a cable cleat does not consider this heating effect, and instead concentrates entirely on the destructive electro-mechanical forces at peak, followed by a short term decaying RMS.

The international standard IEC 61914 requires a short-circuit test duration of just 0.1 second. This equates to five complete cycles, by which time the true strength of a cable cleat will be known.

IEC61914 notes “a cable cleat is provided with a means of attachment to a mounting surface but does not rely on an unspecified mounting surface for the retention of the cables. Examples of mounting surfaces that may be specified are ladder, tray, strut or rail, wire and beam. Where declared, cable cleats provide resistances to electromechanical forces.”

IEC61914 – Calculating Short Circuit Forces To Specify Compliant Cable Cleats

Further Reading

• WITHDRAWN IEC 61914:2009 | Cable Cleats for Electrical Installations
• Cable Cleats from Ellis Patents | Better By Design
• Cable Cleats & Fixings For The Rail Industry by Ellis Patents
• Cable Cleats – Costs v Quality
• Cable Cleats & Safe Cable Installations for the Wind Energy Industry

THORNE & DERRICK

Thorne & Derrick 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 installation and maintenance of low/medium and high voltage power systems:

• 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

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 

Cable Clamps by BAND-IT

Clamping Cables

From traditional metal cutting, stamping and forming, to robotic precision forming and sorting, BAND-IT is paving the way for new manufacturing solutions.

BAND-IT’s in-house engineering team expands the traditional applications and invites the challenges new opportunities have to offer.

Thorne & Derrick have stocked and supplied the BAND-IT range of cable clamps, ties and fasteners since 1985.

With over 75 years’ experience in stainless steel clamping, strapping, banding, bundling, fastening, and identification solutions, we can modify standard clamping systems or develop new solutions for your specific project needs. From customized clamp selection to in-depth field testing and specification, BAND-IT’s engineered applications team and Thorne & Derrick can meet the exacting requirements for your specialized needs.

• Standard and state-of-the-art high speed production tools and fastening solutions
• Unrivalled R&D and engineering support for the BAND-IT product range
• Worldwide manufacturing and distribution facilities
• On call Engineered Applications Team to meet your project needs

Need a custom solution to solve your cable fastening challenge?

All of BAND-IT’s custom stainless steel clamping and cleat solutions for cables are manufactured to provide the highest level of quality and can be customized to:

• Cable clamp easily conformable to any shape
• Securely fasten dissimilar materials, odd shapes and difficult objects
• Withstand extreme temperatures and corrosive conditions
• Stainless steel, high-strength, cable fastening and fixing clamps resist vibration

BAND-IT has engineered cable clamping and fastening solutions for applications in areas such as LV MV HV cable management, hose attachment, identification, insulation and pole and tower mounting in the utility, power and transmission distribution sectors.

More from BAND-IT

• Solar Farms Replace Nylon Cable Ties With Metal Cable Ties
• BAND-IT Band Clamps Used In TR-343 Transducer Assembly
• BAND-IT ULTRA-LOK Cable Clamps Reduce Cable Theft | Case Study
• Securing Fire Resistant Sleeves On Hoses & Wires With BAND-IT JS Clamp

Cable Clamps by BAND-IT

Thorne & Derrick distribute the most extensive range of Low & High Voltage Cable Installation & Electrical Distribution Equipment to the Power Transmission & Distribution industry in the onshore and offshore wind, solar, rail, oil/gas, data centre, battery storage and utility sectors – this includes Joints, Terminations & Connectors to enable the installation of low, medium and high voltage power cables into underground trench or duct.

Cable Hangers for the Support & Management of Cables

Ellis Patents | Cable Hangers & Cleats Supplied in the UK by Thorne & Derrick

Cable Hangers & Support

Pegasus is a modular cable hanger system that is stronger, lighter and, because it is has been designed to be made to order, incredibly flexible in comparison to traditional J-type galvanised steel cable hanger systems.

Pegasus from Ellis Patents comprises a non-corrosive marine grade, extruded aluminium spine that supports any number and combination of plastic cable hangers that are manufactured from a high strength nylon especially formulated to meet the requirements of the London Underground 1-085 specification.

Pegasus Benefits for Hanging Cables 

– Corrosion free nature as a result of there being no bimetallic contact and the aluminium spine being fully enclosed to protect the hanger system against the corrosive effects of brake dust.
– Curved saddle shape on all cable hangers that prevents cable damage caused by sharp edge contact with the outer sheath or jacket of the supported cables.
– Modular design that allows assembly with any number of hangers in any combination, giving designers the ability to produce the cable layout they want.

Manufactured by Ellis Patents, the global market-leader in the manufacture of cable cleats for the management and support of LV MV HV cables.

Thorne & Derrick in consultation with the Asset Manager at Transport for London and their appointed Telecoms & Power contractor secured formal Authorisation & Approval for the Pegasus range of non-metallic cable support hangers.

The product will provide safe cable management of the cable route within the Bridges & Structures category – over 1000 hangers with proven lifecycle performance and utilising the standard J-type design for support of multiple cable runs including single, 3-way and 5-way configurations are now scheduled for delivery.

Associated Articles

• Cable Hangers for Railway Tunnels | Ellis Pegasus Cable Hangers
• Ellis Patents Pegasus Cable Hangers For Rail Cable Support
• Cable Cleats Help Tackle Copper Cable Theft on Railways

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.

MITA GRP Cable Support Systems | Press Release

MITA GRP Cable Support Systems

The below is a Press Release announcing that the MITA Brand are now empowered by Wibe Group.

We are MITA, and we are back.

As a matter of fact, we never left.

We have been supporting our customers through their technical journey on choosing the right product in cable support applications for almost five decades.

With our Mita GRP Cable Ladder, CABSYS Cable Tray, Troughing and Fibastrut ranges, we continue to lead the industry towards a sustainable future.

I am proud to share that as of the 1st of January 2022, we will be fully separated from Schneider Electric operationally and will have stand-alone presence in the UK with our “Made in UK” products which are fully compliant to the related cable management standards.

We cannot hide our enthusiasm having the legend, a 50 year young brand Mita, back on track in the UK market. We are grateful for Schneider Electric’s support so far.

We are now dedicated to bring the best-in-class products and services directly to you with the least time to market and highest competitive advantage. We have our focus on you and are ambitious to grow together.

Wibe Group

This stand-alone company, namely Wibe Group UK Ltd, is a part of Wibe Group. Wibe Group is headquartered in Sweden and is owned by Storskogen which is a publicly listed company founded in 2012, with a mission to acquire and operate well-managed and profitable companies with leading positions in their respective markets.

Wibe Group hosts four of the world’s leading cable management brands WibeR, StagoR, DefemR and MitaR. Looking ahead to the next century, we are reinventing ourselves. This new independent group company offers a complete, innovative range of cable ladders, cable cleats, cable trays and mesh trays for applications ranging from commercial buildings to extreme demanding industrial environments.

We see a bright future where we continue to create clever uplifting solutions together. We are here, stronger than ever.

Patrick Arcidiacono
CEO, WIBE Group UK Ltd and WIBE Group

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, including 3M Cold Shrink, Pfisterer CONNEX and Nexans Euromold products.

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.