A normal light switch, or sensor, would usually be on this circuit to enable the end-user to have control over the light fitting in normal operating mode. Such as how many circuits, feeding the EL's, is there sufficient daylight illuminating the escape routes during the daytime, when the occupants can use the common areas in safety, to enable you to leave the the system in emergency mode while you complete the test and there are others. When zero voltage is detected at L PERM it is the indication to the emergency module in the light fitting that mains power has been lost and that battery power must now be switched on.

The new single circuit would allow the testing of mains power failure to all units via a single key switch. Without emergency lighting, occupants may be at risk of injury or harm, particularly in situations where visibility is limited due to smoke, fire, or other hazards.Some fittings carry out their own test without human intervention or the need for a key-switch and the associated wiring. Our monthly member e-newsletter keeps you informed of current industry issues and legislative changes, as well as forthcoming events and webinars, and podcast releases. If it is a small building and all the emergency lights are on one circuit, then yes, you have no choice.

As well as commercial and industrial fire extinguishers, we can also supply you with extinguisher cabinets, fire blankets, home and car fire extinguishers and accessories. In such circumstances, high risk task lighting will be required and designed in such a way to ensure illumination is maintained as long as the local hazard continues to exist. During this period the light levels will be a lower level of illumination when in emergency mode and depending how long it would take you to walk the emergency lights would it be safe for the relevant persons occupying the building?

This means that you can only carry out the test after working hours, as the remaining light levels will be too low for work purposes. When carrying out an emergency lighting test, a mains power failure (power cut) on the normal lighting circuit/circuits or individual luminaries must be simulated. The British Standard states every emergency lighting system should have means of simulating a failure of the the normal supply for test purposes, with out interruption of the normal supply, this is all you get and interpret as you choose. The single trip switch in a fuse box would switch off all the mains supply to all your emergency lights, however, because you have to switch off the mains supply to a number or one luminaire for up to 3 hours to test the system would this not interfere with your normal lighting?