Help installing new dimmer

Sam22 · Jul 30, 2018

Have installed a dimmer previously, but wiring in this one is confusing me. Have a feeling there’s additional wiring being used because there used to be 2 switches in this room for 1 light, but there’s only 1 switch now.

Photos attached of current wiring and new dimmer. After reading online, I’ve tried putting everything going from L1 to C, everything from L2 to L1 and everything from L3 to L2. But that’s not worked, the switch just turns the lights on/off, no dimming.

[ElectriciansForums.net] Help installing new dimmer

Help please!

MJPD29 · Jul 30, 2018

Is the configuration your using switching the lights correctly with the dimmer? Might sound silly but not all LED lamps can be dimmed

LankyWill · Jul 30, 2018

Corresponding your switch, L1-C, L2- L1, L3-L2.

telectrix · Jul 30, 2018

think the problem may be either non-dimmable LEDs or incompatible dimmer switch.

Taylortwocities · Jul 30, 2018

Do I understand that you only want to use one switch?

If so, you only need to connect up wires from the 2-core and earth cable. You do not need the 3-core & earth cable at all.

Simply put the brown into C on the dimmer and the blue in L1.

As above - this is assuming that your LEDs are dimmerable and are compatable with the dimmer.

westward10 · Jul 30, 2018

That back box has not been earthed.

telectrix · Jul 30, 2018

westward10 said:
That back box has not been earthed.

trust you to spot that first. go to the top of the class.

littlespark · Jul 30, 2018

OP says there's only one switch now!... That infers that the 3 core is going to another switch position where there isn't a switch.
How is the other end of the 3 core terminated?
3 individual connectors?
All 3 joined together?
Just cut off?

Taylortwocities · Jul 30, 2018

Put old switch back.
See if it works. Simples

PS old and new switches are plastic. Just saying…

westward10 · Jul 30, 2018

Plastic??

streamer · Aug 1, 2018

Taylortwocities said:
PS old and new switches are plastic. Just saying…

What's the relevance of them both being plastic?

Taylortwocities · Aug 1, 2018

It’s a matter of what you do with the earth connection. If the switchplate is metal then it must be earthed. Not necessary if it is plastic.

westward10 · Aug 1, 2018

It is the back box which is not earthed at present.

streamer · Aug 1, 2018

Taylortwocities said:
It’s a matter of what you do with the earth connection.

Earth the box with it!

Help installing new dimmer

Sam22

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MJPD29

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LankyWill

telectrix

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Taylortwocities

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westward10

telectrix

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littlespark

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Taylortwocities

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westward10

streamer

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Taylortwocities

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westward10

streamer

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