| Designation | Material Base | Typical Cross-linking Method | Key Feature | |-------------|---------------|-----------------------------|--------------| | | Ethylene Propylene Rubber (EPR) | Peroxide or silane cross-linking | Excellent electrical insulation, good flexibility | | EI 7 | Ethylene Vinyl Acetate (EVA) or similar elastomers | Radiation or peroxide cross-linking | Higher flame retardancy, better oil resistance |

Specifically, this part of the EN 50363 series covers (designated type EI 6 and EI 7 ). These materials are thermosetting (cross-linked) rubbers, meaning once cured, they do not melt or flow under heat, offering superior thermal and mechanical performance compared to thermoplastics like PVC.

1. Overview and Scope BS EN 50363-8 is a European harmonized standard (adopted as a British Standard) that specifies the requirements for cross-linked elastomeric compounds used as insulating materials in electric cables.

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