Waveform Cables 3 Core & 4 Core BS7870-3.40:2011
Waveform Cables
3 Core & 4 Core BS7870-3.40
Contact Thorne & Derrick for competitive prices and UK delivery on the complete range of Waveform Cables – 3 or 4 core with XLPE insulation, copper wire waveform concentric cables with solid aluminium conductors (sector shaped) and PVC cable sheath 600/1000V manufactured by TF Kable.
TF Kable Waveform Cable
Waveform cables are the standard low voltage cable used to construct most new extensions to LV power networks in the UK. The term waveform refers to the neutral/earth wires in the cable which are laid in a wave formation (not wrapped around the cable) to assist cable stripping when the jointer accesses the live conductors.
Thorne & Derrick are Specialist Distributors to the UK Distribution Network Operators and ICP sector providing Waveform Cables, Accessories & Electrical Equipment for LV MV & HV Networks – the DNO approved cables are installed for adoptable networks and contestable connections on following DNO’s: Northern Powergrid (NPG), ENW (Electricity North West), Western Power Distribution (WPD), Scottish Power Energy Networks (SPEN), Scottish & Southern Energy (SSE) and United Kingdom Power Networks (UKPN).
Typical common aluminium conductors from stock are 95sqmm, 185sqmm and 300sqmm.
Waveform cables are XLPE insulated and PVC sheathed power cables used for the supply of LV electrical energy 600/1000V – cables are suitable for installations in the open air, in underground and water, indoor and in cable ducts. The concentric conductor is allowed for use as neutral, protective or earthed conductor.
Simultaneously this also is permitted to apply as a screen, for example earth-connected protection against contact.
Cutting Waveform Cables
Ergonomic To Reduce RSI
The insulated cable cutter tool is engineered to overcome Health & Safety incidents related to arthritis and repetitive strain injuries often associated with the continuous field use of manual ratchet cable cutters by Jointers.
The Klauke ES32SISML-WSH is a battery powered cable cutting tool with a maximum cutting range of 32mm suitable for use with copper and aluminium conductors up to 300sqmm. The Klauke ES32SISML insulated cable cutter has a slim cutting head for Jointers working in substations, switchgear and trenches with confined spaces – this insulated tool provides advanced worker and electrical protection to utility contractors working live in the vicinity of energised Mains and Service cables up to 1000V.
The cable cutting tool is typically used by UK DNO’s and their ICP Contractors to core cut 185sqmm, 240sqmm and 300sqmm Waveform 600/1000V cables.
ES32SISML-WSH Insulated Cable Cutter
Tool Features & Benefits
- Battery system: 10.8V DeWalt Li-Ion Batteries
- Compact and lightweight insulated cable cutter
- Open cable cutting head rotates infinitely
- Environmentally-friendly hydraulic oil, biodegradable
- Ergonomic 2-component housing with soft grips for comfortable and safe, one hand operation
- Faster cable cutting time than ratchet type cutters
- Optimal centre of gravity
- More cost effective model due to slightly reduced functionality
- Length with battery is 15” (38cm)
Cable Delivery
Waveform cables are available from delivery from stock including cable accessories to UK mainland addresses on a next day basis – in response to fault repairs cables can be delivered on a same day “load and run” express basis to site. Please note for sites without offload facility we can arrange delivery via self-loading vehicles.
Waveform Cable Construction | |
Conductors: | Aluminium solid circular (RE) class 1, sector shaped (SE) solid conductor class 1 |
Insulation: | Cross-linked polyethylene XLPE type GP8 acc. to BS 7655-1.3 |
Filling | Non-vulcanised rubber compound |
Concentric conductor | Plain annealed copper wires applied concentrically with a waveform lay |
Outer sheath | PVC compound type DMV 23 acc. to BS 7870-1 Annex B |
Colour of outer sheath: | Black |
Core identification: | 3-core: brown, black, grey 4-core: blue, brown, black, grey |
Characteristic | |
Maximum conductor operating temperature: | +80oC |
Lowest ambient temperature for fixed installation: | -30oC |
Lowest installation temperature: | -5oC |
Maximum short-circuit conductor temperature: | +250oC |
Minimum bending radius during installation: | 8D; D – overall diameter |
Maximum permissible pulling force with cable grip for Al-conductor: | 30 N/sqmm – maximum value 20kN |
Voltage test on complete cable: | 3,5 kV AC/ 5 mins |
Spark test of the oversheath: | a.c. 6 kV/mm x thickness of oversheath and up to max voltage 25kV |
3 Core Waveform CNE Mains Cables
This image shows the Cable Construction of typical 3 core Waveform cable.
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- A – Aluminium Conductor – 3 x solid sector shaped (95sqmm 185sqmm 300sqmm)
- B – XLPE Insulation Thickness – 95sqmm 1.1mm, 185sqmm 1.6mm, 300sqmm 1.8mm
- C – Rubber Bedding Layer
- D – Copper Neutral | Earth Wires (70sqmm CSA 95sqmm | 120sqmm CSA 185sqmm 300sqmm)
- E – PVC Oversheath
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4 Core Waveform CNE Mains Cables
This image shows the Cable Construction of typical 4 core Waveform cable.
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- A – Aluminium Conductor – 4 x solid sector shaped (95sqmm 185sqmm 300sqmm)
- B – XLPE Insulation Thickness – 95sqmm 1.1mm, 185sqmm 1.6mm, 300sqmm 1.7mm
- C – Rubber Bedding Layer
- D – Copper Neutral | Earth Wires (70sqmm CSA 95sqmm | 120sqmm CSA 185sqmm 300sqmm)
- E – PVC Oversheath
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Cable Joints & Terminations For Waveform Cables
Complete range of DNO approved cable joints suitable for straight jointing of Low Voltage 3 & 4 core waveform cables and mains cables (PVC and LSF LSOH sheaths) – terminations, glands and cleats are also available.
Complete range of UK DNO approved cable accessories manufactured by 3M, Pfisterer, Nexans Euromold and Prysmian to joint, terminate and connect power cables operating at LV MV HV – this includes 3.3kV, 6.6kV, 11kV and 33kV cables.
➡ 33kV Termintions Heat Shrink | 33kV Joints Cold Shrink | 33kV Separable Connectors
Waveform Cables
Technical Specification
Number and cross sectional area of conductor | Thickness of insulation | Minimum core lay length | Typical number and diameter of concentric earth conductor wires | Typical waveform lay length |
Thickness of outer sheath | ||
Minimum at any point |
Minimum Average |
Minimum at any point |
Minimum Average |
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n x sqmm | mm | mm | n x m | mm | mm | mm | |
3x35sqmm | 0,71 | 0,9 | 600 | 26 x 1,04 | 220 | 1,43 | 1,8 |
3x70sqmm | 0,89 | 1,1 | 700 | 16 x 1,85 | 220 | 1,51 | 1,9 |
3x95sqmm | 0,89 | 1,1 | 800 | 22 x 1,85 | 250 | 1,68 | 2,1 |
3x120sqmm | 0,98 | 1,2 | 1000 | 28 x 1,85 | 270 | 1,77 | 2,2 |
3x185sqmm | 1,34 | 1,6 | 1200 | 41 x 1,85 | 300 | 2,02 | 2,5 |
3x240sqmm | 1,43 | 1,7 | 1400 | 41 x 1,85 | 375 | 2,19 | 2,7 |
3x300sqmm | 1,52 | 1,8 | 1600 | 41 x 1,85 | 440 | 2,28 | 2,8 |
4x95sqmm | 0,89 | 1,1 | 800 | 22 x 1,85 | 250 | 1,77 | 2,2 |
4x185sqmm | 1,34 | 1,6 | 1200 | 41 x 1,85 | 300 | 2,11 | 2,6 |
4x240sqmm | 1,43 | 1,7 | 1400 | 41 x 1,85 | 375 | 2,28 | 2,8 |
4x300sqmm | 1,52 | 1,8 | 1600 | 41 x 1,85 | 440 | 2,53 | 3,1 |
Number and cross-sectional area of conductor | Approximate overall cable diameter |
Approximate weight of cables |
Maximum dc conductor resistance at 20oC |
Maximum dc concentric earth conductor resistance at 20oC |
Minimum bending radius 8D acc BS7870-1 Annex A Clause A.4.6 |
Pulling force 30N/sqmm acc BS7870-1 Annex A Clause A.4.12 |
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n x sqmm | mm | kg/km | Ω/km | Ω/km | mm | kN | ||||
3x35sqmm | 25,8 | 1055 | 0,868 | 0,868 | 206 | 3,15 | ||||
3x70sqmm | 31,5 | 1662 | 0,443 | 0,443 | 252 | 6,3 | ||||
3x95sqmm | 34,4 | 2139 | 0,320 | 0,320 | 275 | 8,55 | ||||
3x120sqmm | 37,3 | 2611 | 0,253 | 0,253 | 298 | 10,8 | ||||
3x185sqmm | 44,8 | 3893 | 0,164 | 0,164 | 358 | 16,65 | ||||
3x240sqmm | 49,5 | 4615 | 0,125 | 0,164 | 396 | 20 | ||||
3x300sqmm | 55,1 | 5410 | 0,100 | 0,164 | 441 | 20 | ||||
4x95sqmm | 38,7 | 2556 | 0,320 | 0,320 | 310 | 11,4 | ||||
4x185sqmm | 50,6 | 4663 | 0,164 | 0,164 | 405 | 20 | ||||
4x240sqmm | 55,8 | 5579 | 0,125 | 0,164 | 446 | 20 | ||||
4x300sqmm | 62,7 | 6668 | 0,100 | 0,164 | 502 | 20 |