In What Situations Would I Require A Hazardous Area Cable Joint?
Published 07 Mar 2018
A series of How-To videos for repairing, jointing and terminating cables using 3M Cold Shrink & Scotchcast products.
Hazardous Area Cable Joints
This video by 3M Electrical shows in what situations you would require a hazardous area joint such as 3M Scotchcast LVI/3 for jointing power cables in Zone 1 and Zone 2 hazardous areas and
potentially explosive atmospheres according to the ATEX Directive.
3M LVI-3/x hazardous area resin cable joint kits are designed to be used for multi-core, armoured polymeric insulated, low voltage energy cables.
The 3M video explains how hazardous area cable joints are designed for applications where the cable joints must be flame retardant, halogen free and hydro carbon resistant.
3M have been supplying cable accessories and electrical insulating Scotchast resins for use in hazardous areas for more than 25 years and have carried out extensive research into the effects of hydrocarbons in chemical solvents and resin encapsulants.
3M products have been successfully installed in areas such as mines and quarries, underground applications, petrochemical sites and offshore areas where there is a risk of flame or explosion due to the atmospheric presence of flammable gases.
A specialised joint shell which is flame retardant, hydro carbon resistant and halogen free is filled with a 3M 1402FR resin which has been highly modified by the inclusion of various chemical additives. These additives make the resin flame retardant, halogen free and virtually unaffected by immersion and hydro carbons or chemical solvents.
➡ For further information read: ATEX Cable Joints – Jointing Cables In Hazardous Areas Zone 1 & Zone 2
Cold Shrink – invented by 3M over 40 years ago and now the preferred technology for heat-free jointing, terminating, sealing and abandonment of LV HV cables
We hope you find this video informative and educational, contact T&D for technical support, quotations and stock availability for 3M Hazardous Area Cable Joints.
Selecting Hazardous Area Cable Joints
| Conductor CSA (mm2) | 3M LVI-3 Scotchcast Resin Kit Reference For Jointing Power Cables In Hazardous Areas | |||||
| 1 Core 1kV | 2 Core 1kV | 3 Core 1kV | 4 Core 1kV | 1 Core 3.3kV | 3 Core 3.3kV | |
| Â 1.5 | Â – | LVI-3/2 | LVI-3/2 | LVI-3/2 | – | – |
| Â 2.5 | Â – | LVI-3/2 | LVI-3/2 | LVI-3/2 | – | – |
| Â 4 | Â – | LVI-3/2 | LVI-3/2 | LVI-3/2 | – | – |
| Â 6 | Â – | LVI-3/2 | LVI-3/2 | LVI-3/2 | – | – |
| Â 10 | Â – | LVI-3/3 | LVI-3/3 | LVI-3/3 | – | – |
| Â 16 | Â – | LVI-3/3 | LVI-3/3 | LVI-3/3 | – | LVI-3/4 |
| Â 25 | Â – | LVI-3/3 | LVI-3/4 | LVI-3/4 | – | LVI-3/4 |
| Â 35 | Â – | LVI-3/4 | LVI-3/4 | LVI-3/4 | – | LVI-3/4 |
| Â 50 | LVI-3/2 | LVI-3/4 | LVI-3/4 | LVI-3/5 | LVI-3/3 | LVI-3/5 |
| Â 70 | LVI-3/3 | LVI-3/4 | LVI-3/5 | LVI-3/5 | LVI-3/3 | LVI-3/5 |
| Â 95 | LVI-3/3 | LVI-3/5 | LVI-3/5 | LVI-3/6 | LVI-3/3 | LVI-3/6 |
| Â 120 | LVI-3/4 | LVI-3/5 | LVI-3/6 | LVI-3/7 | LVI-3/4 | LVI-3/6 |
| 150 | LVI-3/4 | LVI-3/6 | LVI-3/7 | LVI-3/7 | LVI-3/4 | LVI-3/6 |
| 185 | LVI-3/4 | LVI-3/6 | LVI-3/7 | LVI-3/7 | LVI-3/4 | LVI-3/7 |
| 240 | LVI-3/5 | LVI-3/7 | LVI-3/7 | LVI-3/8 | LVI-3/5 | LVI-3/7 |
| 300 | LVI-3/5 | LVI-3/7 | LVI-3/7 | LVI-3/8 | LVI-3/5 | LVI-3/8 |
| 400 | LVI-3/5 | LVI-3/7 | LVI-3/8 | – | LVI-3/5 | LVI-3/8 |
| 500 | LVI-3/5 | – | – | – | LVI-3/5 | – |
| 630 | LVI-3/6 | – | – | – | LVI-3/6 | – |
| 800 | LVI-3/6 | – | – | – | LVI-3/6 | – |
| 1000 | LVI-3/7 | – | – | – | LVI-3/7 | – |
3M LVI-3 Scotchcast resin cable joints are tested according to EN50393.
| Type of Test According To EN50393 Table 3 / I / A1 | Results |
| AC Voltage Withstand Test In Air 4kV AC / 1 min | Passed |
| Insulation Resistance Test In Air 1kV DC | > 10,000MΩ |
| Heat Cycle In Air 63 Cycles: 5h/3h | Passed |
| Heat Cycle In Water 63 Cycles: 5h/3h | Passed |
| AC Voltage Withstand Test In Water 4kV AC / 1 min | Passed |
| Insulation Resistance Test In Water 1kV DC | > 10,000MΩ |
âž¡ Visit 3M Electrical for further information about joints, terminations, tapes and insulation to seal, repair, splice and connect LV MV HV cables.
Cold Shrink | Joint | Terminate | Seal | Repair | Splice | LV MV HV Cables | 3M
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