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ollie_C

Hi everyone,

I think this is a stupid question, but its not something ive comeup against before and thought id double check...

Ive been asked to install a timer on the lights of the house, so that the lights can be automatically turned on (and off) at certain times of the week.

My current plan is to use an Immersion timer and connect it directly out of the CU to the outgoing cables (2 cables so 2 timers).

Is this right? Is there any need to add an over-ride switch as well?? Can anyone reccomend a timer to use?

Any help would be much appreaciated. :D
 
if you have 2 spare slots in the CU, fit din rail timers. so much neater and easier than wiring external timers.
 
most timers have an over-ride option on them, if your taking the supply from a lighting MCB then thats fine

why would you need two timers though?
 
Yea they have two light circuits (up and downstairs) so i thought id put them on seperate timers, this is also for the economy and conveniance of the client (who needs ALL lights on at the same time!)

Unfortuantely no spare slots in CU at all.
 
OK still can use din rail timers. get an enclusure of the type that will house a D/P isolator. fit the timers in this. feed L and N to timers from the CU MCBs, then take the sw.L to the lights from the timers.

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contactors would allow you to use timers to switch loads larger than their rated current capacity.
 
OK still can use din rail timers. get an enclusure of the type that will house a D/P isolator. fit the timers in this. feed L and N to timers from the CU MCBs, then take the sw.L to the lights from the timers.

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contactors would allow you to use timers to switch loads larger than their rated current capacity.

This sounds like a plan, any particular timers you can recommend? there seems to be a lot of options!
 
Sykraps... Its for religous reasons, they cant turn on lights (or anything else) on the sabbath, they want the timer so that their lights turn on automatically instead of living in the dark!
 
Ask the customer wether they want a digital or analogue timer, fitted a digital timer (£15) last month and the old codger said he couldnt work it so his son paid £80 for an analogue. If you do fit an analogue one make sure it has a battery back up in case of power cuts. The analogue ones take up 2 ways so you will have to fit an enclosure
 
yup! exactly! thats why i was thinking an override switch..

So you would need a programmer with the ability to have different settings for each day and have to remember to leave all the light switches on a minute before the sabbeth day, or alternatively wire a second switch wire to each fitting that would be controlled by the timer unit. I don't see how timing the main feeds would be an effective method as the switches would have to be in the on position and need turning on anyway.
 
Jumpin jax... the cusomer has asked me to quote on both analogue and digital.

Skykraps... Yes the timer would need to have a 7 day cycle, unless I could attach an override switch that bybasses the timer during the other 6 days :) Ive already informed my customer that they would have to have all relevant light switches in the on position for this to work, but this can be done before the sabbath starts. Granted not the most efficient way of doing it, but considerably cheaper that running additional switch wires!
 
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contactors would allow you to use timers to switch loads larger than their rated current capacity.[/QUOTE]

Or multiple circuits from the same controller :0
 

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