Unable to configure a simple IEC connector with an illuminated switch

Question

I have this IEC connector with an illuminated single-pole switch.

Here is how it looks like from back side:

As you see above the earth, line and the neutral are mentioned. But for the switch side there is no marks so I marked them as A B and C.

Here is the catalog for this type of connectors: http://www.bulgin.com/media/bulgin/data/Power%20Entry%20Modules.pdf

If you go to page 277 you find this model named as C20 IEC Inlet.

I cannot see any kind of information how line and neutral will be wired to the illuminated switch. Is there a standard or how can I figure this out?

Edit:

Let's say I would know which pin is 1 2 and 3.

There can be two ways to wire this:

Config 1

or

Config 2

Dashed gray line is when the switch is OFF. I think the pin 2 is the fixed pin.

But which configuration is better than the other one?

Btw I only tried Config 1 and the switch makes arc like sound when one turns it on.

Answer 1

Take a look a page 2 of that document and you’ll see this: This says to me that you want to connect the hot input to pin 1, your load to pin 2 and neutral to pin 3 to complete the circuit for the light.

Now as for which pins are 1, 2 and 3, that’s not clear but take and ohmmeter and check to see which pins open and close with the switch: those are 1 and 2. If the light stays on even with the switch open, you have 1 and 2 switched - easy to fix.

Answer 2

That datasheet is difficult to interpret.

^{simulate this circuit – Schematic created using CircuitLab}

Figure 1. Switch schematic.

Given the problem I would approach it as follows:

Using a continuity tester identify the switch contacts. They will go between over-range and zero when opened and closed. The third contact is neutral.

Figure 2. Possible wiring. Colour codes are European.

• If 'C' is the neutral then wire it up as shown.
• Power up and test the switch. The power indicator should go from off to on with the switch.
• If the indicator remains on with the switch then swap the two non-neutral wires on the switch.