Concentric & Split Concentric Cable Stripping Tools

Published 08 Aug 2018

Alroc Tools - Cable Jointing Tools (MV HV)

Alroc Tools – Cable Jointing Tools (LV MV HV)

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

Thorne & Derrick, Specialist Distributor of LV HV Jointing & Cable Installation Equipment are working with Alroc to improve the efficiency of cable preparation for Jointers working on LV MV HV electrical distribution systems.

The innovative Alroc DBT compact cable stripping tool is used by LV Jointers employed by NERS Accredited Independent Connection Providers (ICP’s) for the removal of the PVC outer cable sheath and primary insulation over the stranded copper or solid aluminium conductor on BS7870 Concentric & Split Concentric cables.

These LV aluminium and copper cables are approved by UK Distribution Network Operators (DNOs) including Scottish Power Energy Networks (SPEN), Scottish & Southern Energy (SSE) and UK Power Network (UKPN).

Concentric and split concentric cables have been adopted as standard for use by DNOs to provide the final connection to residential properties. Additional cable functionality includes use for LV sub-main distribution and installation within high-rise buildings (LSZH Low Smoke Zero Halogen type) and street lighting systems.

The choice between Concentric and Split Concentric cable is determined by the supply type: TN-C-S supply for Concentric and TN-S supply for Split Concentric.

Concentric Cables

Concentric cables are used for power supplies with Protective Multiple Earthing (PME) systems, where a combined Protective Earth (PE) and Neutral (N) – together known as the PEN – connects the combined neutral-and-earth to real earth at multiple locations to reduce the risk of electric shock in the event of a broken PEN.

Split Concentric Cables

Split Concentric Cables are used when the power supply has separate PE & N conductors and are only combined as PEN near the power source. The Protective Earth and Neutral are not connected after the building entry point.

Jointers Tools

Alroc DTB cable end strippers enable the user to remove the outer sheath insulation of LV cable ranging from 16sqmm up to 150sqmm. The ruler engraved in the cable jointing tool sets the length of the XLPE insulation to be removed. The DTB cable end strippers are compact, light and heavy duty and are available for different cable sections – 16-25sqmm, 35-54.6sqmm and 70-150sqmm.

Alroc offer a range of low voltage cable preparation splicing and stripping tools suitable for use prior to cable joint and termination installation.

Cable Stripping Tools

➡ Watch the following Video which demonstrates the ease and simplicity the Jointer can remove the cable sheath and insulation from the Concentric cables prior to installing the cable joints onto the distribution network.

Split Concentric & Concentric Cable Stripping Tool


♦ PDFs Courtesy & Property of Eland Cables

Alroc Tools

Alroc Tools are used and recommended by PFISTERER for MV HV cable preparation of cables prior to installation of their market-leading CONNEX plug terminations for connection to gas insulated switchgear and substations.

Thorne & Derrick

T&D are Specialist Distributors to UK Distribution Network Operators (DNO’s), NERS Registered Service Providers, ICP’s and HV Jointing Contractors of an extensive range of LV, MV & HV Jointing, Earthing, Substation & Electrical Eqpt – this includes 11kV/33kV/66kV cable joints, terminations and connectors for both DNO and private network applications.

Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.

Key Product Categories: Duct Seals | Insulated ToolsCable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HV 

Further Reading