IEC inlet wiring

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IslandPink
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IEC inlet wiring

Post by IslandPink » Sat Feb 09, 2019 7:47 pm

I just spent about 2 hours trying to find a wiring diagram for a Bulgin IEC inlet socket.
It seems amazing Bulgin can't provide simple advice on what to do with the switch tags, nor seemingly can anyone else...
I had only used the Double-pole ones before on amps, this one I bought for the tweeter amp is a single pole one.
https://uk.rs-online.com/web/p/iec-conn ... %3Atrue%7D
There are three tags ( marked 1, 2, 3 ) on the switch. 1 and 2 appear to connect or disconnect with the switching - so I assume the post-fused live goes to one of those, and comes out of the other.
The third one - do I connect neutral to that one, or earth, or nothing ?
Exasperated of Denbigh.
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Re: IEC inlet wiring

Post by IslandPink » Sat Feb 09, 2019 7:59 pm

OK, the link below is the best I can find. The diagram ( answer ) near the bottom of the page suggests the switch pin that doesn't connect to the other two should be attached to neutral.
https://electronics.stackexchange.com/q ... ted-switch
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Re: IEC inlet wiring

Post by ed » Sat Feb 09, 2019 8:18 pm

if you looked on the RS page you linked...next to datasheet is 'Power Entry Modules Product Datasheet'.......

this shows the switch configs for illuminated and non illuminated switches
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Re: IEC inlet wiring

Post by IslandPink » Sat Feb 09, 2019 9:08 pm

Yes, thanks, I went through that document and saw those diagrams, but I couldn't understand enough about what they were supposed to be telling me. After I digested the wiring pic in link above, I started to understand the datasheet see-saw diagrams. I suppose the little rectangle is a voltage source is it ? - does that mean Live goes to pin 2 ?
I really think they could spell it out a bit clearer, given the safety implications of wiring up a mains switch.
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Re: IEC inlet wiring

Post by Mike H » Sun Feb 10, 2019 2:54 pm

That little rectangle is a resistor? Next to the round neon lamp symbol? Image

So yeah, live to pin 2, then neutral on pin 3 so the lamp lights, and then output from pin 1, to wherever. Simples! Image
 
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Re: IEC inlet wiring

Post by IslandPink » Sun Feb 10, 2019 6:03 pm

Maybe there is a resistor too - but I'll go with live to pin 2 and pin 1 to the amp.
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Re: IEC inlet wiring

Post by Nick » Sun Feb 10, 2019 6:36 pm

The third one - do I connect neutral to that one, or earth, or nothing ?
To answer your question, if you want the neon to work, then neutral to 3.

Post fused to 1, 2 out to amp.

But I don't think it matters is 1 and 2 are swapped.
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Re: IEC inlet wiring

Post by IslandPink » Sun Feb 10, 2019 6:39 pm

I got the bit about 3 to neutral. Is there a reason for the 1/2 arrangement you favour vs. what I was going to do ? - I was just going to got in the kitchen to do it !
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Re: IEC inlet wiring

Post by Nick » Sun Feb 10, 2019 7:19 pm

IslandPink wrote:
Sun Feb 10, 2019 6:39 pm
I got the bit about 3 to neutral. Is there a reason for the 1/2 arrangement you favour vs. what I was going to do ? - I was just going to got in the kitchen to do it !
Well, the diagram suggests that the neon between 2 and 3 is also switched in which case it will make no actual difference. I guess it was based on the idea that when off live was connected internally to less things when connected to 1.
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Re: IEC inlet wiring

Post by IslandPink » Sun Feb 10, 2019 7:32 pm

Yes, I see that might be slightly better, I have done it this way. Thanks.
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Re: IEC inlet wiring

Post by Mike H » Mon Feb 11, 2019 7:16 pm

Nick wrote:
Sun Feb 10, 2019 6:36 pm
But I don't think it matters is 1 and 2 are swapped.
Ah that makes more sense. :thumbleft:
 
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