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Hi there, a new DIY member here based in Hong Kong, where getting reliable electricians can sometimes be a challenge!

I've been finishing off a rennovation project and one of the last jobs is to attach a 20amp isolator switch for an indoor split AC unit (Panasonic).

The electrician who started the installation was unable to finish the job (Covid related!) and getting another one is proving impossible right now. All that remains is simply (ahem) attaching the isolator switch. So I'm wondering if you can point me in the right direction?

The issue - is that there are a few to many wires in the box for it to be clear (to me) which need to be attached to which terminals.

In my set up, I have 4 switches pictured (located either side of a dividing wall between 2 bedrooms and control 4 independent devices.)

Switch 1 - A dimmer switch for the ceiling light in room 1 (switch attached and working normally)
Switch 2 - The 20 amp isolator for the AC unit in room 1 that I need to attach
Switch 3 - A 20 amp isolator for the AC unit in room 2 (switch attached and working normally)
Switch 4 - A dimmer switch for the ceiling light in room 2 (switch attached and working normally)

Please see the attached photos, you'll see that in switch 2 for the AC unit, there are 6 wires, (3 lives and 3 neutrals). 2 of the lives (of different thickness) are paired together and 2 of the neutrals (also different thickness) are also paired together. Leaving 1 live and 1 neutral as yet un-stripped. (from a different inlet port).

In the other 20amp (switch 3) that the electrician attached, there are 2 lives and 2 neutrals running into the corresponding Load and Line terminals. Is it obvious how switch 2 should be wired form looking at these photo's please?

Your help is much appreciated!
 

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