Cable protection covers, tapetiles and underground warning tapes are installed over LV, MV and HV power cables in trench and ducted cable installations with high visibility colour providing a visual warning of danger when excavating cables. 11kV and 33kV cable protection tapes (Tapetile and Stokbord covers) are manufactured from heavy duty plastic for reliable protection.
All underground cables and cable ducts should be protected from damage by a cable protection tape (Tapetile) or cover (Stokbord) – generally the utility specifies the cable protection to be installed over the underground LV, ,MV & HV cables as indicated in trench drawings and this varies according to the distribution network operator (DNO). Cable protection tiles should be Approved and marked in accordance with EATS 12- 23.
11kV 33kv Cable Protection
Location of Tapetile & Cable Protection Covers
For instance UKPN, a UK DNO, recommend approved cable warning tapes shall be installed 200mm above all low voltage cables and joints. Approved cable marker tapes shall be installed 250mm above all 11kV cables and joints – where an 11kV cable is installed directly below another cable, the protection tape shall be installed immediately below the higher cable. Approved cable covers, such as Stokbord, shall be installed 75mm above all 33kV cables and 33kV joints. Where existing warning tapes or covers on any LV-HV cable are disturbed or removed during excavation, the cable protection shall be replaced or renewed as appropriate.
- Underground Cable Warning Tapes – LV 600/1000 Volts
- Tapetile Cable Covers – 11kV MV Medium Voltage Cables
- Stokbord Cable Covers – 33kV 66kV 132kV HV High Voltage Cables
Damage to underground electrical cables cause fatal or severe injury and in the UK law stipulates that adequate cable protection precautions must be taken to avoid danger.
"the effect of an HV cable strike on the human body could be described as having your internal organs cooked from the inside-out." - SP Energy Networks (UK DNO).
Pictured, the aftermath of an 11kV cable strike – an excavator came into contact with a high voltage cable (11,000 volts). The operatives on site had been supplied with cable records and proceeded to excavate the required spoil from around the cables in a safe manner (according HSG47) ready for the cables to be jointed. An overnight rain storm filled the excavation with water and the cable strike occurred when the excavator was used in an attempt to remove the excess water with the excavator bucket.
- 4 Core Waveform LV low voltage underground cable strike with excavator
- Power cable strike by mini-excavator without prior hand excavating or location of underground cable services
- Live service cable damaged at lead branch joint during street lighting cable duct
Should you require technical support about selecting correct and suitable LV-HV cable protection tiles, covers or tapes, please do not hesitate to contact us.
➡ See below our complete range of Cable Protection Tapetile and Stokbords.
Cable Protection ♦ Cable Covers ♦ 11kV 33kV MV HV ♦ Tapetile ♦ Stokbords ♦ Cable Tiles ♦ Cable Covers ♦ Underground Cables ♦ Cable Trench