Electrical Safety Clearance (New Zealand Electrical)(Part-5)
Min Safe Distance between Buildings and Overhead Line:
Voltage | Pole | Tower |
11 kV to 33 kV | 2 Meter | 2 Meter |
33 kV to 66 kV | 6 Meter | 6 Meter |
66 kV and Above | 8 Meter | 8 Meter |
Min Safe Distance for excavation near Overhead Line:
Description of Clearance | From Pole (Min) | From Tower (min) |
Excavation in land more than 750mm depth | 8 Meter | 12 Meter |
Excavation in land up to750mm depth | 2.2 to 5 Meter | 6 to12 Meter |
Excavation in land up to300mm depth | 2.2 Meter | 6 Meter |
Construction near 11KV to 33KV Line | 2.2 Meter | 6 Meter |
Construction near 33KV to 66KV Line | 6 Meter | 9 Meter |
Construction near 66KV and more | 8 Meter | 12 Meter |
Wire Fence near 1KV to 66KV Line | 2.2 Meter | 2.2 Meter |
Wire Fence near 66KV and more | 5 Meter | 5 Meter |
Min Safe Distance for Tower Carin near Electrical Tower:
Description of Clearance | Distance (Min) |
Mobile Carin movement | 4.0 Meter |
Tower Carin movement | 4.0 Meter |
Carin movement | 4.0 Meter |
Moving Activity above height of Tower | 4.0 Meter |
Hedge Cutter movement | 4.0 Meter |
Min Safe Vertical Distance above Railway Track:
Description of Clearance | Distance (Min) |
Earthed conductors | 5.5 Meter |
Stay wires | 5.5 Meter |
Conductors up to 33 kV | 6.5 Meter |
Conductors above 33 kV to 220 kV | 7.5 Meter |
Conductors above 220 kV. | 8 Meter |
Min Distance between two Conductors on Same Supports:
High Voltage Circuit | High Voltage Circuit | Distance between circuits(min) |
Up to 33 KV | Up to 1KV | 1.0 Meter |
Up to 33 KV | More than 1KV | 1.2 Meter |
33 KV to 110 KV | Up to 1KV | 1.5 Meter |
33 KV to 110 KV | More than 1KV | 2.0 Meter |
More than 110 KV | All | 2.5 Meter |
Min Distance between two Conductors on Different Supports:
High Voltage Circuit | Distance (min) |
Up to 1 KV | 0.6 Meter |
1 KV to 33 KV | 1.2 Meter |
33 KV to 66 KV | 1.8 Meter |
110 KV | 2.4 Meter |
More than 220 KV | 2.8 Meter |
Min Safety Distance from Electrical Apparatuses:
Description of Clearance | Distance (min) |
Passage In front of Metal Clad Switchgear (UP to HV) | 1.0 Meter wide 2.5 Height |
Passage In rear or side of Metal Clad Switchgear (UP to HV) | 1.0 Meter wide 2.2 Height |
Passage at any side of Metal Clad Switch gear containing Bare conductor (UP to HV) | 0.8 Meter wide 2.2 Height |
Min Approach Distance for Non-Competent Person near exposed Live Parts:
Voltage | Distance (min) |
Below 110 kV | 4.0 Meter |
220 kV and above | 6.0 Meter |
Min Approach Distance for Competent Person near exposed Live Parts:
Voltage | Distance (min) |
Below 1 kV | 0.5 Meter |
11 kV | 1.5 Meter |
22 kV | 2.0 Meter |
33 kV | 2.5 Meter |
66 kV | 3.0 Meter |
110 kV | 4.0 Meter |
220 kV and above | 6.0 Meter |