Oct 22, 2007 2:53 pm
since the builder install the downlights not exactly on ideal position, I am thinking to change the fitting to the tiltable one. but the problem is, the existing hole is not big enough for the new fitting. should I call the electrician to make the hole bigger? is it safe to DIY ?
btw, this is only for fitting. I'm not changing anything else
Re: new downlight fitting5
Oct 23, 2007 2:14 pm
your kidding right? call an electrician? seems a little extreme
get a jab saw from the local hardware, costs next to nothing and looks like a ugly steak knife, and just trim the edges, gyprock is very easy to cut and it should take all of 5 seconds.
you can even use an old kitchen knife if you like...your only looking to make the hole slightly bigger.
another option is to buy a holesaw of the correct size and use that to make the hole bigger, will look neater. my local bunnings has a "Down light installation kit" of all size holesaws for $8. You would just need a steady hand to make sure the holesaw doesnt go off course.
since the ballasts are the same, you wont need to do any re-wiring. just use the old ballasts on the new fittings.
Re: new downlight fitting6
Oct 25, 2007 11:30 pm
becareful with the insulation stuff in the ceiling, there were reports about downlights installed by DIY causing fire....
See these 2 posts from my blog:
Re: new downlight fitting7
Oct 26, 2007 12:10 am
If your downlights are 12V I would imagine that you are legally allowed to "play with the wiring".
If they are low voltage downlights then just unscrew them, poke the wires up into the ceiling (but make sure you can get them back), use a hole saw to drill the hole, retrieve wires, rewire and pop in. Nice clean proessional job.
A hole saw is a cylinder with saw cuts along one side, which fits into you drill. Will make a nice clean hole of the right size. As others have meniotned, make sure the insulation around the transformers and light fittings are clear of them (as it shoud be before you started the process).
If the downlights are not low voltage, things get difficult.
Demolition August 2009, Construction Started September 2009, Completed December 2010
Re: new downlight fitting8
Oct 26, 2007 11:59 am
it's 12v downlight btw. and I'm not changing anything beside the fitting.
As others have meniotned, make sure the insulation around the transformers and light fittings are clear of them (as it shoud be before you started the process)
how do I do that?
Re: new downlight fitting12
Nov 13, 2007 11:42 am
How did you go with this?
Technically, an electrician isn't required to change the "gimble" (frame) of the downlight, as it's no different to changing a globe (because the frame isn't connected to any live electrical wires; they're connected to the transformer a short distance away). Be aware that some frames have mounting brackets for the transformer, which would need to be unclipped. If the electrician has done his job properly, there shouldn't be any exposed single insulated wires going into the transformer, and you are safe to touch/move the transformer. Double insulation is required to be continuous all the way into the transformer terminal cover. If you see any coloured wires, then they are the single-insulated wires.
You are correct; adjustable gimbles are usually larger diameter than fixed ones. You'd need to make sure you aren't likely to cut or damage any of the wiring that is in the roof space when you make the hole bigger. The insulation problems have already been mentioned so I wont elaborate. The other thing to watch out for is around the hole there might be timber (which the gyprock is attached to) which may prevent (or make more difficult) you making the hole larger in the direction you want to go.
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