emergency Lighting installation

[leebut]

Hi Guys

I've fitted a few emergency lighting circuits to both domestic and commercial installs before, I've come across one I can't get my head round, this is going to be in a small supermarket one of these locals etc the existing lighting in the retail area is installed with three banks of three led battens so for ease of description shop left, shop middle and shop right each of these circuits have three LED battens attached to them and each circuit is fed from its own MCB in the DB, I'm guessing these circuits are fed separately at the DB only so that if one bank of lights goes off the retail area is still illuminated by the other two banks of lights.

So my question is how can I wire in an emergency lighting system on to the three circuits so that if any one circuit goes off the emergency lights are activated because the other two circuits would still be live, which would mean the emergency lights wouldn't come on, is there some kind of off the shelf relay system available that would work with this.

Thanks in advance guys


regards


Lee

 

[westward10]

What are you fitting maintained or non maintained.

 

[leebut]

What are you fitting maintained or non maintained.

the clients specification is Non Maintained

 

[nicebutdim]

Could you provide a rough sketch of the planned lighting?

 

[leebut]

Could you provide a rough sketch of the planned lighting?

I'm on with drawing up as we speak

 

[R-fur]

You could use a phase failure relay, they fit on DIN rail and are the size of one module. If any phase goes below a preset value then a contact operates.

 

[westward10]

Do you have BS5266 and experience of emergency lighting design.

 

[leebut]

Do you have BS5266 and experience of emergency lighting design.

Hi

I've done the C&G accredited installer course for fire alarms and emergency lighting with Napit, design of a straight forward single circuit with multiple non maintained lights isn't the issue here, its the three MCB's that are feeding three banks of lights in the retail area.

my initial idea was to connect all three circuits onto one MCB back at the DB the total load for the nine LED battens is no more than three Amps, but the initial designer of the lighting system has set the shop floor area so that if one bank of lights fails then there's two other banks of light so the retails store doesn't have to close.

 

[westward10]

Why would you connect them all to one circuit?
Three circuits with non maintained bulkheads from each through three test facilities.

 

[DefyG]

would mean the emergency lights wouldn't come on,

Would they need to come on if the other 2 banks of lights are still live?
A sketch would help.