| TIT | Tube isolant thermoplastic |
| THD | Tube thermoplastic dur |
| THF | Tube thermoplastic flexible |
| THFW | Tube thermoplastic difficilement inflammable |
| THFG | Tube th. flexible rainuré |
| THFWG | Tube th. flexible, rainuré Difficilement inflammable |
| ALU | Tube aluminium |
| ISR | Tube de protection pour câbles |
| No hl | Sans halogène |