Safety
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Warning notes
Safety clearance with portable fire extinguisher, when extinguishing at low-voltage
installations
Voltage Kind of extinguishing Safety clearance
up to 1 kV Dry chemical powder (ABC, BC), CO2 and halon 1 m (3 ft)
Water fire extinguisher, wall hydrant 3 m (9 ft)
Safety clearance with C-nozzle and high pressure nozzle, when extinguishing at low
voltage installations
Voltage Fire fighting system Kind of extinguishing Safety clearance
up to 1 kV C-nozzle Water spray nozzle, dry pow-
der, extinguishing gas
1 m (3 ft)
C-nozzle Water full jet 5 m (16 ft)
High pressure nozzle Water full jet 5 m (16 ft)
Safety clearance with C-nozzle and high pressure nozzle, when extinguishing at high
voltage installations
Voltage Fire fighting system Kind of extinguishing Safety clearance
1 kV - 380 kV C-nozzle Water spray jet, dry powder,
extinguishing gas
5 m (16 ft)
C-nozzle Water full jet 10 m (32 ft)
High pressure nozzle Water full jet 10 m (32 ft)
Water turret Water full jet 30 m (98 ft)
Water spray jet 10 m (32 ft)
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