Wiring LED Strip to Light Switch

[pertinky]

Morning Chaps,

Hopefully just a confirmation of sorts...looking at wiring a 4m length of led strip lighting to a 2gang light switch.

The strip itself is fixed in to a channel at the back of a oak beam and I've mounted the transformer out of sight, but accessible.

Something like this

Am I right in thinking its a case of choc-blocking the LED strip to the transformer and then running some 1mm2 T&E back to the J/B and 1 core from the J/B to the switch (power to the LED switch will be taken from the other switch drop on the 2-gang.

 

[pertinky]

That is not a transformer, it is a power supply as it says on the unit. LED Hut are ignorant.

With your suggested wiring where is the neutral to the J/B?

Ah ok, in that case what do I need to swap it out for?

Heres a very quick and dirty drawing!

 

[ban-all-sheds]

Ah ok, in that case what do I need to swap it out for?

Nothing - it's just the name Winston doesn't like.

Heres a very quick and dirty drawing!

See anything wrong here:

?

 

[pertinky]

You don't need to. Just remember it is not a transformer, it is a DC power supply. LED Hut are ignorant. Transformers are AC devices, LED strips need DC.

Right, so basically its fine, just dont call it a transformer?

 

[pertinky]

Nothing - it's just the name Winston doesn't like.



See anything wrong here:

View attachment 153579

?

Switched Live?

 

[Taylortwocities]

Switched Live?

Just because it's a blue wire, doesn't make it a neutral!
Might be worth modifying your diagram. Or the forum police will be on your case..

 

[pertinky]

Just because it's a blue wire, doesn't make it a neutral!
Might be worth modifying your diagram. Or the forum police will be on your case..

Eeesh, I'll take it down if thats the case. I know what it meant, and @ban-all-sheds hopefully doesnt think im a complete moron now.

 

[Taylortwocities]

You’d have to ask him yourself

 

[pertinky]

You’d have to ask him yourself

I'll get my coat then!

 

[ban-all-sheds]

The thing is, it is clear from your diagram that those wires can't be neutral, and N does not stand for blue, or black.

You could have labelled the wires in your diagram anything you like -

and it would still have worked when connected as drawn.


But events verging on catastrophic can occur if you assume that blue/black wires are all neutrals, so calling them that is a Bad Idea.

 

[ban-all-sheds]

Also be aware that 12 volt DC (eff) can be 24 volts switched on and off to produce an average ( effective ) voltage of 12 volts. LED elements may be adversely affected by the 24 volts leading to early failure of the LED elements. Some SMPS units rated as 12 volt (eff) have been found to produce 36 volt pulses but the average was about 12 volts.

Also be aware that if LEDhut are selling something which they say is suitable for 12V LED strips it's probably not going to damage them.