What is mechanical protection?
- 50mm thick (or greater) concrete slab.
- 25mm thick (or greater) ground contact treated timber.
- Tough plastic slab of minimum dimensions 6mm thick x 150mm wide x 750mm long.
- Mechanical protection shall be positioned to give maximum protection to the power cable or gas line from any digging activity.
- Refer to the table above for the power line clearances.