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Each emergency luminare should have a rating plate stating its mode of operation. The rating plate will have numbers and letters on it.
X = self contained, meaning all parts for its operation are contained within the fitting.
1 = maintained.
0 = non maintained.
180 = 3 hours duration.
A maintained fitting should always be illuminated at material times.
You need a copy of BS5266.
 
They are maintained at material times, when required, when the sensor switches them on. Maintained.

They are a combined fitting contains 2 separate lamps.
1 from the switched supply - non emergency
The other is a non maintained emergency lamp supplied from the batteries and only coming on when power fails
 
The lamp has 2 separate parts to it.

You can get combined maintained and non maintained fittings
 
Yes it is maintained. If the plate states it is Maintained then this is its mode of operation to be illuminated at material times. Granted some of the LED fittings do have a separate LED on the tray for emergency operation nevertheless they are Maintained.
 
Maintained. They are never non-maintained.

I'm sure someone is going to correct me here but.
My understanding is,

a maintained fitting would be something like an emergency exit light box that is lit 24/7 with a backup that allows it to continue to be lit when the power fails.

a non-maintained fitting would be something like an office light, like a grid fitting that is switched on or off during normal operation to light the room when required, but will always turn on when the power fails.
 
Is there a ph
I'm sure someone is going to correct me here but.
My understanding is,

a maintained fitting would be something like an emergency exit light box that is lit 24/7 with a backup that allows it to continue to be lit when the power fails.

a non-maintained fitting would be something like an office light, like a grid fitting that is switched on or off during normal operation to light the room when required, but will always turn on when the power fails.

Nope.

Your second example is a maintained light fitting with a light switch.
 
A maintained fitting does not need to be illuminated 24/7. It should be illuminated at material times.
 
thanks for the enlightenment guys, you have forced me to investigate my poor understanding of the terminology.

for anyone else that is unsure, I found this and it may help to enlighten others.

What is non-maintained emergency lighting?
Non-maintained emergency lighting is a luminaire made solely for emergency use. It is designed to come on in the event of a mains power failure, making sure all emergency exit routes are clearly illuminated, but will not be active as your normal day-to-day lighting system.

What is maintained emergency lighting?
Maintained emergency lighting luminaires are built to be active continuously in every day life, and through the event of a power cut. Just like a normal luminaire, when running ordinarily they will take power from the mains supply, but when they switch to emergency mode they take power from a back up battery.
 

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