Intermediate switch - understanding L1 & L2

[BriscsWK]

I just wish to be certain before I change our intermediate light switch on our landing:

We have two cables each with one black and red wire.
The new switch has 2 L1s at the top and 2 L2s at the bottom (it's a contactum intermediate if that helps).

I know I should be able to figure it out but my minds gone walk about...

How should this switch be wired please?

Many thanks

Stuart

 

[ban-all-sheds]

//www.diynot.com/wiki/electrics:intermediate

 

[BriscsWK]

Thanks - I have now found out I have been sent a DP switch not an intermediate switch! I know a dunce for not spotting it before but at least it's not my total ineptness at understanding wiring that's at fault for it not working.

 

[PrenticeBoyofDerry]

Are you sure it's an intermediate switch you want or is it a two way one.
Intermediates are used when more than two switches are used to operate a light.
If your light is operated by two switches only, you need a two way switch.

 

[davelx]

Thanks - I have now found out I have been sent a DP switch not an intermediate switch! I know a dunce for not spotting it before but at least it's not my total ineptness at understanding wiring that's at fault for it not working.

are you sure? The terminal markings suggest it's an intermediate - if you have a multimeter, check which terms connect to which in each position. For an intermediate, one position should give L1-L1 & L2-L2 and the other L1-L2, L2-L1.

 

[BriscsWK]

Pretty certain as though it has four terminals as described it has two diags one showing intermediate switch with 'int' under it and one showing double pole with 'dp' under it - then on the back I found 'dp' stamped on it and as it doesn't work wired as intermediate I think it confirms it's a dp! And yes it's a 3 switch hall/landing arrangement so intermediate is required and what is currently in situ.

Many tks

Stuart