Q/ Can 3M Electrical Offer MV Cable Joints For Hazardous Areas?
Published 04 Apr 2019
-
uploaded by Chris Dodds - Sales & Marketing Manager at Thorne & Derrick
MV Cable Joints
A/ All 3M Electrical Cable Accessories which utilise 3M Cold Shrink technology are inherently safe to install in potentially 
explosive atmospheres as they do not pose a risk of ignition to flammable gases in hazardous area workplace locations as designated Zone 1 or Zone 2 according to the ATEX Directive.
For clarification on the relationship and application of ATEX with respect to Cold Shrink cable accessories for LV MV applications refer to our Blog ➡
ATEX & Cold Shrink | Certification & Safe Working In Zone 1 / Zone 2 Hazardous Areas
Hydrocarbon Resistant Cable Joints
Thorne & Derrick stock and supply 3M Electrical cable joints for MV cables with 3 core cable construction for both XLPE/EPR type cables – these are polymeric insulated cables.
For single core cables where the cables to be jointed are located in hazardous areas with hydrocarbons present the cable joints can be encapsulated using a joint mould/shell and Scotchcast 1402FR resin – the joint would be installed according to the Jointing Instruction as usual apart from the final cold shrink outer tube which would be substituted with the cable joint mould/resin.
Typically, installers have used the 92-NA-6U cable joint kit, manufactured by 3M Electrical, which is designed for LV unarmoured cables – the mould shell fits over the cable stripping dimensions of the 3M 92-AG Cold Shrink range of MV joints for single core polymeric cables (XLPE EPR). The larger 1451-PET mould can also be used in conjunction with appropriate volume of 3M resin using the Mix Pack 7 litre packs. This solution would provide excellent protection of the cable joint against the deteriorative effects of prolonged exposure to hydrocarbons in either air installations on cable containment or direct burial where the joint is to be buried in underground contaminated ground or cable trench.
âž¡ Further reading:Â 3M Cold Shrink vs Heat Shrink
Cold Shrink
LV, MV & HV Jointing, Earthing, Substation & Electrical Eqpt
For Use In Hazardous Areas & Explosive Atmospheres
Thorne & Derrick International are specialist distributors of LV, MV & HV Cable Installation, Jointing, Duct Sealing, Substation & Electrical Equipment – servicing UK and global businesses involved in cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.
THORNE & DERRICK Product Categories: Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HV
Pfisterer | Nexans Euromold | Prysmian | Cable Joints & Terminations MV HV
