23/06/2026
BYA, NYY, and BYM codes on cables indicate their construction, insulation, and usage.
BYA:
- B = Special insulation (PVC or rubber)
- Y = PVC insulation
- A = Single core
Used for low and medium-voltage installations.
NYY:
- N = Standard
- Y = PVC insulation
- Y = PVC outer sheath
Commonly used in power distribution, underground, and indoor installations. It is water and mechanically resistant.
BYM:
- B = Special insulation
- Y = PVC insulation
- M = Flexible
Used for flexible installations where mobility is required.
In summary:
- BYA is a single-core PVC-insulated cable
- NYY is a multi-core PVC-insulated and sheathed cable for fixed installations
- BYM is a flexible cable for mobile applications
If you need a specific cable for a project, checking its detailed specifications is recommended.
