Timer bulkhead
- Thread starter Hib
- Start date
The battery pack ( white pack at bottom left ) tells me it is an emergency lamp of some sort. Provides light when there is no mains power by running an inverter ( the PCB ) off the batteries.
The terminal block ( middle left ) needs to have been connected to the terminals with the fuse ( middle right ) for the unit to have ever worked.
By the state of it it would appear it is old and the battery pack is likely to be useless and the printed circuit board looks like it has suffered from damp and maybe corrosion.
Extra thought
Emergency lights are not normally switched ( other than a test switch to check the battery and inverter are in working order ) but are permanently connected to live. Loss of mains switches the inverter on and the lamp lights until mains power is restored or the battery runs out.
As there are two red wires coming in I suspect the original intention was to have a light that could be switched ON and OFF by a switched live ( one red wire ) and with a timer it would stay on for few minutes after the switched live was turned off using the permanent live ( the 2nd red wire ) but the person bought the wrong type of lamp.
Faced with both live and switched live on the incoming block and only one live on the fused block he or she gave up and left the connection out.
The two blocks allow for an easy change of the front half without having to disconnect the supply wiring to the half fixed to the wall.
The terminal block ( middle left ) needs to have been connected to the terminals with the fuse ( middle right ) for the unit to have ever worked.
By the state of it it would appear it is old and the battery pack is likely to be useless and the printed circuit board looks like it has suffered from damp and maybe corrosion.
Extra thought
Emergency lights are not normally switched ( other than a test switch to check the battery and inverter are in working order ) but are permanently connected to live. Loss of mains switches the inverter on and the lamp lights until mains power is restored or the battery runs out.
As there are two red wires coming in I suspect the original intention was to have a light that could be switched ON and OFF by a switched live ( one red wire ) and with a timer it would stay on for few minutes after the switched live was turned off using the permanent live ( the 2nd red wire ) but the person bought the wrong type of lamp.
Faced with both live and switched live on the incoming block and only one live on the fused block he or she gave up and left the connection out.
The two blocks allow for an easy change of the front half without having to disconnect the supply wiring to the half fixed to the wall.
When you put the light unit back together, the terminals on the right of the picture fit over the terminal block on the left of the picture and that's how it gets it's supply.
Cunning.... And I missed it ..... now I can see the matching rust stains on the live terminals
Yes I still think it is not a lamp with a run on timer ( delayed switch off )
The wiring to the lamp may have permanent live and switched live. Measure to find what the two reds are.
It only has live and neutral fed to the front part it as only two of the terminals are used. There are provision for three ( Live Neutral and Switched Live ) on the back part but only two are equiped on the front part.
But the most convincing is there appear to be only enough components on the PCB to create an inverter to run the tube from the battery in the absence of mains.
Possibly it appeared to work the way your customer wanted it to as when he turn the switch on the light came on. And when he switched it off the light stayed on for a while. But what might have been happening was the batteries were flat ( or too low to run the inverter ) so no light. Turn the switch on and the lamp gets mains so the light lights and the battery recharges. When the switch is turned of there is enough charge in the battery to run the inverter for a few minutes.
If its the exit from a restaurant then it MUST be an emergency light to illuminate the escape route. By removing it you are contravening building regulations and the fire officer/licensing authority will not be happy.
Just replace it like for like and be done with it. By law the owners of the restaurant have to keep a record of the functional testing of their emergency lighting system.
Nick
Just replace it like for like and be done with it. By law the owners of the restaurant have to keep a record of the functional testing of their emergency lighting system.
Nick
Thats a Thorn waterproof emergency job.
I quess that second disused red may be a switched live.
usually they are sustained.
one tube is unlit normally except in power fail and the second tube supply switched to use as a light.
This may have been replaced previously, with the one tube guts, that you have now.
Did you try a new lamp as those are quite reliable fittings
Obviously you need to screw the guts back in to make the contacts.
some of them had a starter,usually the maintained ones, but cannot see one on yours, possibly a non maintained version.
I quess that second disused red may be a switched live.
usually they are sustained.
one tube is unlit normally except in power fail and the second tube supply switched to use as a light.
This may have been replaced previously, with the one tube guts, that you have now.
Did you try a new lamp as those are quite reliable fittings
Obviously you need to screw the guts back in to make the contacts.
some of them had a starter,usually the maintained ones, but cannot see one on yours, possibly a non maintained version.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
