emergency light

[paul b b]

hello chaps,

i have not installed em lights before, i am guessing here so please confirm.

do i take the feed from the cu to a key switch and then to lights? so they can be tested?

and do i need non maint for a shop?

thanks

 

[bluetobits]

hello chaps,i have not installed em lights before, i am guessing here so please confirm.

do i take the feed from the cu to a key switch and then to lights? so they can be tested?

and do i need non maint for a shop?

thanks

Feed should be taken from same cct as standard ltg for which it is providing back up for. As for maintained/non maintained dont really think it matters too much (might be wrong)

 

[Robin Spark]

Others will confirm on here, but my understanding is that maintained EL is for places like cinemas, clubs etc where the lighting is low and you need to highlight emergency walkways, fire escape doors etc at all times.

With a shop (is it the sales floor?), then non maintained would be ok as the sales floor is well lit anyway and why would you want a little maintined fitting on at all times if its not needed.

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If you want more info your probably best getting the electricians emergency lighting guide from the IET or waterstones etc.

http://www.theiet.org/publishing/books/wir-reg/emergency-lighting.cfm

This will give advice on where to locate luminaires and a better insight into whats involved....is this a small independant or quite a large retail store?

 

[paul b b]

thanks robin,

its a small shop, 1 retail floor, 1 celler, but the regs guy wants 1 in the toilet, 1 in the back store room 1 in celler, 1 by main door, 1 top of stairs from celler and 1 in the back office so making it 5 in total

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so is it correct that it does not need its own circuit

 

[batty]

thanks robin,its a small shop, 1 retail floor, 1 celler, but the regs guy wants 1 in the toilet, 1 in the back store room 1 in celler, 1 by main door, 1 top of stairs from celler and 1 in the back office so making it 5 in total

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so is it correct that it does not need its own circuit

Emergency lighting is taken from the circuit its protecting no point putting it on a seperate circuit you have a fault on circuit you are protecting but emergency light will not come on because it still has power.

 

[bluetobits]

Think you need a minimum of 1 LUX, and fittings placed at every change of escape direction, floor level change and at doors.

 

[kme]

Note. If you are installing EM lights in a commercial premises, you WILL be required to provide a BS5266 compliance certificate.

This may be difficult to achieve, if you do not have access to a copy of said standard.

i.e. the certificate will ask for any deviations from BS5266; the serial no. of the light meter used, etc. etc.

Just so you know......

KME

 

[septiclecky]

This link may be of help

http://www.cooper-ls.com/dg_emersystem.html

 

[a1]

Maintained Emergency Luminaire:

A luminaire containing one or more lamps, all of which operate from the normal supply or from the emergency supply at all material times.

Non-Maintained Emergency Luminaire:

A luminaire containing one or more lamps, which operate from the emergency supply only upon failure of the normal mains supply.

 

[Apache]

Maintained Emergency Luminaire:
A luminaire containing one or more lamps, all of which operate from the normal supply or from the emergency supply at all material times.

Non-Maintained Emergency Luminaire:

A luminaire containing one or more lamps, which operate from the emergency supply only upon failure of the normal mains supply.

The way I remember it is in the event of a power cut a maintained light maintains light!

:Chair fall

 

[paul b b]

i take it they are wired directly in to the loop and the battery supplies power if there is no in feed and the light comes on, if you can understand that lol.....so if a em light is on a circuit and you turn the mcb off the light comes on.

do i need a test switch on the light?

 

[batty]

i take it they are wired directly in to the loop and the battery supplies power if there is no in feed and the light comes on, if you can understand that lol.....so if a em light is on a circuit and you turn the mcb off the light comes on.do i need a test switch on the light?

Yes.

 

[Evans Electric]

Yes to your description of wiring .

Yes to test switches.

You can buy fittings which are maintained or non-maintained by removing a link ,I'd guess a shop needed non-maintained.

 

[kme]

,I'd guess a shop needed non-maintained.

I wouldn`t be "guessing" at all, in this situation.

If youi`ve got someone specifying the job; they`ll be the one to tell you which fittings, and if they want 1 test switch, or more (location of test switch IS important).

KME

 

[Evans Electric]

I said "Guess" because the smaller shops I've worked at in the city had non-maintained and we fiitted same.

 

[paul b b]

Thanks chaps

the em lights are on multipul (is that how you spell it? I'm drunk ) circuits so I take it I will need a test for every circut

 

[Evans Electric]

Thats right Paul . To recap, feed them from the local circuit , In my opinion a seperate circuit is useless , if the stairs lights blew a fuse you want the emergency fitts to come on not remain charging up on their own circuit.

All the fittings will need a test key , you can test more than one if you have some looped together .

 

[paul b b]

Thanks Deke