Author Topic: Emergency Lighting (Read 17907 times)

colin todd · « **Reply #15 on:** October 10, 2005, 09:22:21 PM »

Simulation ofcct failure involves a switch to dis the supply to the s/c fitting or CB unit. The 7671 test they are talking about is probably the routine inspection and test of any electrical installation (eg for a factory). The routine test periods for EL are in BS 5266-8.

Nev Roberts · « **Reply #16 on:** October 11, 2005, 02:36:19 PM »

Thank you Colin, you have confirmed my own thoughts. Thank you also to all other contributors. I have got the hang of this now,and will not ask the same question twice in future.

colin todd · « **Reply #17 on:** October 11, 2005, 07:23:01 PM »

Pleasure, but see comments re auto testing in your other posting.

kurnal · « **Reply #18 on:** November 15, 2005, 07:06:42 PM »

Its my opinion that most escape lighting systems (those using self contained units) are incorrectly wired back to an independent circuit breaker on a distribution board and so cannot possibly operate on local subcircuit failure in accordance with BS5266.

As is usual I raised this in one of my recent risk assessments and today one client invited me back to meet his electrical contractor - who appeared refreshingly competent! But he was adamant that the wiring regulations and 5266 have a divergence as the wiring regs specify that the escape lighting system be wired from a dedicated breaker.

Whilst this may explain why so many systems only operate on total mains failure to the building - and not at all if a fire takes out just the lighting subcircuits- I cannot believe that the great and the good on the BSI committees have allowed such contradictions to continue.

I'm too mean to buy a copy of the regs to check this out- can anyone advise me please?

AnthonyB · « **Reply #19 on:** November 15, 2005, 11:29:45 PM »

I've come across shop units where the only method installed to switch the shop floor lighting at the end of each day kills the mains, switching on the EL units via their batteries overnight, so that when it reopens they are flat & spend the morning charging. I thought it was the staff getting confused or using the dis. board at night but have seen it demonstrated in one unit - also some of those used the dis board as no other switching was fitted.

You get some very odd installations!

jayjay · « **Reply #20 on:** November 16, 2005, 12:41:44 PM »

We seem to have had this discussion before (see previous post re BS 5266 in October

to quote,

"Regarding the testing You need to check the BS EN 50172:2004 BS 5266-8:2004 document.

This now states the following (my brackets)

ANNUALLY
Each luminaire and internally illuminated sign shall be tested (operated) as for the monthly test but for its full rated duration in accordance with the manufacturer's information.

There is no reference to three years in this latest standard.

Graeme · « **Reply #21 on:** November 21, 2005, 09:02:52 PM »

can someone help me out here?

i don't have mega amount of experience in em-lighting but i have been referred to 5266-8 recently for testing etc but as a member of the BSI i received a new catalogue advertising for 5266-1 2005 but cannot find anything for part 8.

do i now go by this publication?

g

colin todd · « **Reply #22 on:** November 23, 2005, 01:12:51 AM »

Graeme, Part 8 was published in December 2004. The revsied Part 1 has all the stuff on testing and maintenance removed from it, and now refers people to art 8 for this information.

Graeme · « **Reply #23 on:** November 23, 2005, 06:51:58 PM »

thanks Colin. Will look again but could not see it listed before.

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Author Topic: Emergency Lighting (Read 17907 times)

Graeme

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