SECTION 12: ELECTRIC DISCHARGE LAMP INSTALLATIONS

 SECTION 12
 ELECTRIC DISCHARGE LAMP INSTALLATIONS

 A fireman’s emergency switch shall be provided for

1. Exterior Electric Discharge lighting installations and/or
2. Interior Electric Discharge lighting installations which run unattended (window lighting for display purposes).

Every fireman’s switch shall -

1. Be arranged to isolate the installation from all poles of the supply, except that it need not isolate the installation from the neutral conductor of a 3-Phase 4-wire supply.
2. Be coloured red and have fixed near it a nameplate marked with the words " FIREMAM’S SWITCH' in English and Arabic. This plate should be of minimum size 150 mm by 100 mm with lettering not less than 15 mm high.
3. Have its "on and Off' positions clearly indicated by lettering legible to a person standing on the ground.
4. It shall be fixed in a conspicuous position, reasonably accessible to firemen, and not more than 2.75 metres from the ground.
5. For exterior installations it shall be outside the building and adjacent to the electric discharge lamps(s), or alternatively a notice indicating the position of the switch shall be placed adjacent to the electric discharge lamp(s).
6. For interior installations, it shall be in the main entrance to the building or alternatively in a position to be agreed with the local fire-brigade authority.
7. The voltage to earth shall not exceed 5 KV.