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Control measure
Isolate power supply to luminous discharge tube signs

Control measure knowledge


Fire switch for luminous discharge tube sign - photograph courtesy of Janet Guthrie

Larger displays should have a fire switch in a prominent position; this may be located inside or outside a building depending on the location of the luminous discharge tube sign.

Tactical actions

Incident commanders should:
  • Isolate the sign using the fire switch if available and accessible
  • Always assume there is a high voltage (3kV)
  • Request attendance of the electricity supplier or competent person where isolation is not possible
  • Ensure that care is taken if any signs need to be removed, and if so consider the use of respiratory protective equipment (RPE)
  • In the event of a tube failing, implement hazardous materials procedures; refer to National Operational Guidance: Hazardous materials