Typical values for different materials are listed below.
Values are taken from IEC 60287-2-1 with following additions or deviations:
| Material | Value | Reference | |
|---|---|---|---|
| PE | 3.5 | Polyethylene (LD/MDPE, ST3) | IEC 60287-2-1 |
| HDPE | 3.5 | High density polyethylene (HDPE, ST7) | IEC 60287-2-1 |
| XLPE | 3.5 | Crosslinked polyethylene (XLPE) | ~ HDPE |
| PVC | 5.0 (U_n <= 30kV) 6.0 (U_n > 30kV) | Polyvinyl chloride (PVC, ST1/2) | IEC 60287-2-1 |
| POC | 3.5 | Polyolefin copolymer (POC) | = PE |
| PP | 5.9 | Polypropylene (PP) | Polypropylene - The Definitive User's Guide and Databook |
| PPY | 5.9 | Polypropylene yarn (PP) | Polypropylene - The Definitive User's Guide and Databook |
| SiR | 5.0 | Silicone rubber (SiR) | shinetsusilicone-global.com |
| FRNC | 3.5 | Flame-Retardant Non-Corrosive polyethylene (FRNC) | = PE |
| CR | 5.5 | Polychloroprene (CR, Neoprene) | IEC 60287-2-1 |
| CSM | 9.1 | Chlorosulphonated polyethylene (Hypalon) | metz.net.au |
| CJ | 6.0 | Compounded jute | IEC 60287-2-1 |
| RSP | 6.0 | Rubber sandwich protection | IEC 60287-2-1 |
| BIT | 6.0 | PVC/bitumen tapes | IEC 60287-2-1 |
| HFS | 3.39 | HFS-110-TP (AS/NZS 3808:2000 R2016) | amplex.com.au |
| Ot | 2.3 | Other | IEC 60287-2-1 |