Spiking 11kV High Voltage Power Cables Using Tyco F-CSTE Hydraulic Cable Spiker

By Chris Dodds on 17th May, 2017

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Safety is paramount when working daily with live electricity - it is essential to know whether the cables you are working with are live or dead.

Two or more buried cables from cable terminations can present a hazard as it is often difficult to identify which cable is dead. 

The identification of a particular cable circuit can be uncertain - this can be the case where a cable diversion is required for new works, such as a road or other utilities work. 

Tyco HV Cable Spiker Kit CSTE has over 30 years service experience reassuring the cable jointer that the cable they are working on is dead.

 

Essential Safety Rules

  1. Only a competent engineer can operate this equipment and is required to comply with his or her company Health & Safety regulations
  2. A responsible person must have taken all reasonable steps to ensure that the cable to be spiked is ‘dead’
  3. HSE ‘Safe Working Practices’ States "where underground cables cannot be positively identified and proved dead at the point of work, it may be necessary to spike the cable"
  4. HV circuits/cables can retain stored energy (eg capacitance). Spiking cables limits the risk of possible incorrectly earthed circuits or wrongly identified cables that may be connected to potentially charged stored energy circuits
  5. Connection of the spiker earth point to a good site earth is essential
  6. Always operate the spiker at the full distance that the hydraulic hose allows and at a safe distance from (point 3.)
  7. Never attempt to spike a cable of larger diameter than specified
  8. Always ensure that the spiker blade has reached the limit of its travel before approaching the cable spiker

HV Spiker Kit Contents

Spiking 11kV High Voltage Power Cables Using Tyco F-CSTE Hydraulic Cable Spiker

  • Single and 3 core mains cable 11kV
  • 11kV XLPE power cables for power networks, underground, outdoors and in cable ducting. 11kV cables are certified - BS6622 and BS EN/IEC 60228. Sheathed in a durable PVC sheathing.
  • Tyco CSTE cable spiker must not be used on cables above 11kV as such cables may exceed the mechanical features of the cutting blade.
  • Conventional cable spiker guns will spike 11kV 3 core polymeric cables, although a jacking attachment is required to facilitate the removal of the spike from the cable

The Bowthorpe Spiker Kit is a safety device that is designed to prove that a cable an engineer or cable jointer is working on is live or not. The Tyco CSTE is robust in design, does not require an explosive catridge and is suitable for up to 102mm overall cable diameters.

Tyco CSTE is supplied with an independant insulated earth supplied 6m x 50sqmm and uses a fully insulated hydraulic hose which is 6m long. Regular maintenace is required to ensure no oil leaks and that the tool has a sharp spike.Cable Spiker

Cable Spiker Kit – Tyco CSTE - Assembly

  • Fig 1 details the clamping arrangement for the cable
  • Unscrewing the clamp allows the ram and spiker mechanism to be removed. (Fig 2)Cable Spiker
  • Ensure the spike is fully retracted prior to clamping into final position
  • The cable can then be placed in the V shaped tray and the ram and spiker mechanism can be placed around the cable and clamped into position
  • Copper earth point is provided “A”Cable Spiker
  • The standard earth cable is 6 metre long and must be fitted to “A” (longer lengths can be provided on request) 
  • The cable must be fitted to a suitable earth point which is checked before useCable Spiker
  • The selected earth point must be effective. Where no effective earth is available within 6 metre an extra earth lead of the same cross sectional area and current carrying capability must be added to reach a sound earth point
  • Tyco CSTE has a mechanical dial which indicates the travel of the spiker down into the cable (Fig 4)

Notes:

  • If the cable is live a short circuit will occur
  • Depending on the available short-circuit current damage to the spiker kit will occur
  • The cable spiker kit should remain in position until a responsible person has confirmed that the previously ‘live’ cable is now ‘dead’ and has been isolated and earthed
  • Removal of the spiker kit following a short-circuit event should be done with care and all parts inspected for damage
  • After an event the Tyco CSTE will need to be serviced

 

Thorne & Derrick Specialist Electrical Distributor

Established since 1985, T&D distribute the most extensive range of LV, MV & HV Cable Jointing, Terminating, Pulling & Installation Equipment - contact us today for a competitive quotation.

Key Products : MV Joints & Terminations, Cable Cleats, Duct Seals, Cable Transits, Cable Splice Closures, Underground Cable Protection, Jointing Tools, Feeder Pillars, Cable Duct, Earthing & Lightning Protection, Electrical Safety, Cable Glands, Arc Flash Clothing Protection & Fusegear.

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Spiking 11kV High Voltage Power Cables Using Tyco F-CSTE Hydraulic Cable Spiker





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