Published 09 Jan 2026
We’d like to welcome our newest addition to the Thorne and Derrick team! Eva will be joining us as a content creator apprentice at our office in Chester-Le-Street. Eva will bring fresh new ideas to all of our social...
Image: Pete Thomasson – HV Cable Jointer / Linesman
Pictured: 6.6kV 3 Core Cable Breakout Using 3M Scotch Tapes

Pictured: 3M Scotch 2229 Mastic Tape
3M Scotch Tapes used include 3M 33+ Vinyl, 3M 2228 Mastic Tape and 3M 2229 Mastic Seal.
The cable jointer reverted to a taped cable breakout solution due to difficulty sizing re-jacketing sleeves to insulate and protect the cable cores.
Thorne & Derrick International are 3M Electrical UK’s largest stockist of their range of Scotchcast and Cold Shrink cable joints, terminations and abandonment kits for industrial and hazardous area installations.

3M Electrical
3M Scotch-Seal 2229 Mastic Tape Applications
Established since 1985, Thorne & Derrick 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, Underground Cable Protection, Jointing Tools, Feeder Pillars, Cable Duct, Earthing & Lightning Protection, Electrical Safety, Cable Glands, Arc Flash Protection & Fusegear.
Distributors for : 3M, Pfisterer, Nexans Euromold, Elastimold, Catu, Roxtec, Emtelle, Centriforce, Lucy Zodion, Alroc, Hivotec, Cembre, Prysmian, Ellis Patents, ABB & Furse.

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Includes access to our popular JOINTERS BLOG with contributions from utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.
Published 09 Jan 2026
We’d like to welcome our newest addition to the Thorne and Derrick team! Eva will be joining us as a content creator apprentice at our office in Chester-Le-Street. Eva will bring fresh new ideas to all of our social...
Published 09 Jan 2026
Insulating Matting Recommendations and Guidance for Electrical Safety Guest Blog From COBA Electrical safety is non-negotiable, especially when working around live switchgear, high-voltage panels, and electrical distribution equipment. One critical but sometimes overlooked safeguard is electrical insulating matting, designed...