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Do-It-Yourself (DIY) Question & Answer Forum
Changing a ceiling light fixture - advice?
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 525359" data-attributes="member: 250"><p>Your assumption is incorrect....</p><p>The number of cables / wires at any light fitting depends upon the wiring arrangements and methods adopted by whoever originally installed it.</p><p> </p><p></p><p>The basic problem that the majority of DIY'ers have when thinking that changing a light is just three wires,</p><p>is that they forget (or never knew), for a light to be able to switch on and off, (rather than being on permanently)..</p><p>somewhere there MUST connections for:-</p><p></p><p>Permanent Live.</p><p>Switched Live.</p><p>Neutral.</p><p>Earth.</p><p></p><p>These may all be at the light / at a switch / or at a junction box somewhere else..</p><p></p><p>Additionally if there are multiple lights on the circuit and/or worked from the same switch,</p><p>there could be additional connections extending these functions as well..</p><p></p><p>So BEFORE removing anything you need a clear understanding of how your particular set up is wired..</p><p></p><p>My guess from your photos are:-</p><p></p><p>one cable has Blue / Brown / Earth</p><p>these will be your Permanent Live + Neutral + Earth supply feed</p><p></p><p>another cable with Brown / Brown / Earth</p><p>these will be your Permanent Live + Switched Live + Earth going to the switch(es).</p><p></p><p>So you need the single Blue from cable 1 and single Brown from cable 2 into your light connections..</p><p>Then a separate connector for the other two Browns and another connector for the two Earths.</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 525359, member: 250"] Your assumption is incorrect.... The number of cables / wires at any light fitting depends upon the wiring arrangements and methods adopted by whoever originally installed it. The basic problem that the majority of DIY'ers have when thinking that changing a light is just three wires, is that they forget (or never knew), for a light to be able to switch on and off, (rather than being on permanently).. somewhere there MUST connections for:- Permanent Live. Switched Live. Neutral. Earth. These may all be at the light / at a switch / or at a junction box somewhere else.. Additionally if there are multiple lights on the circuit and/or worked from the same switch, there could be additional connections extending these functions as well.. So BEFORE removing anything you need a clear understanding of how your particular set up is wired.. My guess from your photos are:- one cable has Blue / Brown / Earth these will be your Permanent Live + Neutral + Earth supply feed another cable with Brown / Brown / Earth these will be your Permanent Live + Switched Live + Earth going to the switch(es). So you need the single Blue from cable 1 and single Brown from cable 2 into your light connections.. Then a separate connector for the other two Browns and another connector for the two Earths. [/QUOTE]
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Changing a ceiling light fixture - advice?
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