We have produced a number of publications designed to:
- assist you to keep safe when working or playing around our transmission lines.
- assist you to understand our work on or over your property
Tower foundation replacement involves replacing the steel at and below the level of the ground, to ensure they continue to maintain the structural integrity of the tower.
- Tower Foundation Replacement [ pdf 407.02 KB ]
The Electrical Code of Practice sets minimum safe electrical distance requirements for overhead electric line installations/other works associated with the supply of electricity to consumers.
- New Zealand Electrical Code of Practice for Electrical Safe Distances [ pdf 874.96 KB ]
Over time, transmission poles may require replacement due to normal age-related wear and tear or to ensure safe ground clearances are maintained.
- Transmission Pole Replacement [ pdf 232.28 KB ]
Helicopters are a vital part of inspecting and maintaining our 11,800 km of transmission lines throughout the country.
- Transmission Line Helicopter Operations [ pdf 517.04 KB ]
We routinely check and assess the condition of that equipment to ensure the National Grid continues to provide a safe and secure power supply for the country.
- Transmission Line Condition Assessments and Patrols Work Overview [ pdf 311.68 KB ]
Tower painting is part of our routine maintenance activities to ensure they continue to provide a reliable service over their expected lifetimes.
- Tower Painting Work Overview [ pdf 646.28 KB ]
Tower foundation refurbishment involves reinforcing transmission tower foundations, to ensure they continue to accommodate the existing and future loadings expected in their lifetimes.
- Tower Foundation Refurbishment [ pdf 556.61 KB ]
Transmission line hardware is a general term describing the fittings on a structure (tower or pole) including those items attached to the conductor (wire).
- Routine Transmission Line Hardware Maintenance [ pdf 499.91 KB ]
Insulators insulate the line so that the electricity being transported stays on the line and does not become earthed through the supporting structure.
- Insulator and Hardware Maintenance Work Overview [ pdf 248.17 KB ]