Safety
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Warnings
Safety clearance of materials conducting electricity to overhead lines
Voltage Safety clearance
up to 1 kV 1 m (3 ft)
1 kV - 110 kV 3 m (9 ft)
110 kV - 220 kV 4 m (13 ft)
220 kV - 380 kV 5 m (16 ft)
Safety distance for fire fighting operations on low-voltage systems
(up to 1 kV)
Extinguishing agent Safety clearance
Extinguisher with dry powder
(ABC, BC)
1 m (3 ft)
Extinguisher with CO
2
1 m (3 ft)
Extinguisher with halon 1 m (3 ft)
Wet extinguisher, standpipe sys-
tem
3 m (9 ft)
Safety distance for fire fighting operations on low-voltage systems
(up to 1 kV)
Extinguishing agent Safety clearance
C-nozzle with water spray jet 1 m (3 ft)
C-nozzle with dry powder 1 m (3 ft)
C-nozzle with extinguishing gas 1 m (3 ft)
C-nozzle with full water jet 5 m (16 ft)
HD-nozzle with full water jet 5 m (16 ft)
Safety distance for fire fighting operations on high-voltage systems (1
kV - 380 kV)
Extinguishing agent Safety clearance
C-nozzle with water spray jet 5 m (16 ft)
C-nozzle with dry powder 5 m (16 ft)
C-nozzle with extinguishing gas 5 m (16 ft)
C-nozzle with full water jet 10 m (32 ft)
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