Health, Safety & Environmental BulletinBulletins highlight issues that will be experienced throughout the industry, and prove a useful tool to encourage the raising of standards and awareness of health and safety issues industry wide. No 539
27 October 2016
Daylight Savings Time
Daylight Savings Time ends on 30th October and the clocks with go back an hour. This will mean dusk will fall during working hours and lights on photocells will illuminate automatically.
When working on signage or digging in areas potentially containing cables, always be aware that the cables can become live at any time. This is particularly true for circuits controlled by timeclocks or photocells.
All circuits near the equipment you are working on should be isolated following your LOTO procedures, and you must use a probe tester to ensure the circuit is dead. However, this process does not prevent the circuit from becoming live at any time, especially if the circuit labelling is poor and it is controlled via automated switching systems. Before touching any cable, immediately test it, do not rely on a test you carried out previously. If you are digging, regularly re-scan the area.
If you find a cable that you thought had been isolated has become live, do not touch it! Stop work and contact your line manager immediately.