Finding a hidden transformer

[mozzo]

A client has 6 x SELV downlights running from a single transformer that is buried within the fabric of the building (ceiling, I guess).
The client has no idea where the transformer is and I will need to find it. Naturally there are a number of problems and a number of test that could be performed to try and locate the transformer depending if an electronic transformer or toriodial is used and whether the 12v lights are wired in a star from the transformer or if there is a single run of cable from the transformer looping to each light.
I am just looking at doing low ohm meter reading to identify the closest light point to the transformer and maybe a EMF dectector before opening up the floor boards or ceiling to look around.
Anyone got any other technique that you would like to share? Thanks

 

[needasparks]

Without being prepared to make the investment in tools and equipment then you are down to an educated guess and ripping the floor boards up

You are of correct there. No one really likes spending money but with things like that they are priceless when fault finding and on inspections. I bought my camera about 5yrs ago for £150 and its paid for itself more times over than i can remember.

 

[Marvo]

I like the cable tracer idea. I have one that will work to locate cables buried up to 1 meter and you can adjust the sensitivity etc. I'm sure it would work at least up to the transformer.

 

[needasparks]

Buried upto a metre ? are you sure ? Buried in what ? custard !

 

[imago]

Buried upto a metre ? are you sure ? Buried in what ? custard !

Going by how the roads sink after cables have been run I think that's what they use with about 10mm of tarmac over the top.

 

[needasparks]

Going by how the roads sink after cables have been run I think that's what they use with about 10mm of tarmac over the top.

Now you have said that, I may be thinking of something completely different like one of them light pen things.

OK, I'll get my coat !!!!!!

 

[alarm man]

Drop all the fittings put the remote unit on each of the cables and trace it back all cables will / should merge at one point the transformer. You could try a stethoscope on the ceiling and listen for the transformer hum

is it serious doc??

no sir you just have a bad case of transformer hum.i'll give you a good whack on the back that should sort it.:ihih:

 

[Marvo]

Buried upto a metre ? are you sure ? Buried in what ? custard !

http://www.instrumentsgroup.co.za/index_files/Fluke/2042,CableLocatr.pdf

They say it's good for up to 2.5 meters but maybe thy did get that depth in custard. It does work well up to around 1 meter, much deeper than that it becomes more art than science and it's a bit hit and miss.

 

[alarm man]

found it!!!!!!!!!!!!!!!!!!!! :coolgleamA:

 

[Snapester]

Where was it!