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103 posts

Master Geek


#272805 16-Jul-2020 22:03
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Hi,

 

While I was installing some insulation and I saw the RCD powerpoint that is in the bathroom and I noticed something that called my attention.

 

The photo is for reference but I do believe the RCD is acting as a normal powerpoint.

 

 

 

The two top connectors are not in use, is that correct?

 

 

 

 

 

 

i know to fix this I need an electrician but I curios to know how this should be connected (as long if it is wrong)

 

 

 

Thanks


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5308 posts

Uber Geek

Trusted

  #2524434 16-Jul-2020 22:05
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The other two terminals are to allow for more power points to be wired in downstream and also be RCD protected.




103 posts

Master Geek


  #2524435 16-Jul-2020 22:16
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Should the connection be like this? Based from what I found on the internet, all cables at least 2.5mm?

 

 

 

 

 

 

 

 


 
 
 
 




103 posts

Master Geek


  #2524436 16-Jul-2020 22:17
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DarthKermit:

 

The other two terminals are to allow for more power points to be wired in downstream and also be RCD protected.

 

 

I think that is the idea of this type of powerpoint (to be RCD protected) otherwise a normal powerpoint would be installed.

 

what do you think about my previous reply? is that connection correct?


3373 posts

Uber Geek

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  #2524443 16-Jul-2020 22:44
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No it is not! The RCD has an input and a protected output and they should not be wired together..

Even though you have an RCD if you add any sockets to the circuit the new work has go be inspected before it is connected.

Edit. You are right in 1st post that wiring is wrong. Without knowing history of the connection it's hard to tell whether it was a mistake or the RCD is faulty and it was a deliberate bodge.



103 posts

Master Geek


  #2524444 16-Jul-2020 22:46
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Bung: No it is not! The RCD has an input and a protected output and they should not be wired together..

Even though you have an RCD if you add any sockets to the circuit the new work has go be inspected before it is connected.


So the way it's is correct?

1369 posts

Uber Geek

Subscriber

  #2524450 16-Jul-2020 23:03
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samgdan:
Bung: No it is not! The RCD has an input and a protected output and they should not be wired together..

Even though you have an RCD if you add any sockets to the circuit the new work has go be inspected before it is connected.


So the way it's is correct?

 

The way you have drawn it is not correct.

 

Th drawing from the supplier is correct.




103 posts

Master Geek


  #2524455 16-Jul-2020 23:20
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I understand but the way that currently is connected (my first post) is correct?
Is the RDC function of the PowerPoint working in that way?

 
 
 
 


1369 posts

Uber Geek

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  #2524460 16-Jul-2020 23:29
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I can't say as I can't read the markings in your photo. I'm looking for 'line in' or similar.


272 posts

Ultimate Geek


  #2524462 16-Jul-2020 23:34
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@gregmcc, care to wade in here?

231 posts

Master Geek

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  #2524463 16-Jul-2020 23:35
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Your photo is conveniently taken at an angle so that the lettering molded into the plastic is illegible...

 

 

 

Your diagram of how it is currently wired is incorrect, and will not provide protection. You should be able to test this - pushing the test button will not cut the power.

 

Your proposed wiring diagram for rewiring is also incorrect. You need to wire the incoming power to the top two terminals and earth. If you have a second cable at the socket, leading to the rest of the circuit, you would connect this to the lower terminals as the manual shows.

 

Those two lower terminals came from the factory with a bright orange sticker saying 'do not use these unless...' on them. Someone really screwed up. They also come with a neon wired into them for the 'power available' light.

 

 

 

I think messing around with RCDs might be outside the scope of ECP51; you might need a sparky for this. I can't be bothered to go read it...




103 posts

Master Geek


  #2524465 16-Jul-2020 23:36
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elpenguino:

 

I can't say as I can't read the markings in your photo. I'm looking for 'line in' or similar.

 

 

 

 

it is like this

 

LINE IN  AP and N are not in use currently

 

the other tree connectors, yes.

 

please be aware that this is a sample photos, but the RCD that I have is exactly the same.

 

 

 


10587 posts

Uber Geek


  #2524466 16-Jul-2020 23:39
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I'm not a sparky, but I'd very very surprised if the position of the terminals wasn't in the same order as the schematic, and as such with the phase connected directly to the output socket, then nope - the socket won't be RCD protected.

 

 


231 posts

Master Geek

Lifetime subscriber

  #2524467 16-Jul-2020 23:43
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Fred99:

 

I'm not a sparky, but I'd very very surprised if the position of the terminals wasn't in the same order as the schematic, and as such with the phase connected directly to the output socket, then nope - the socket won't be RCD protected.

 

 

 

 

Correct, but schematics are not always that nice and can sometimes be flipped left-right (are you looking at it from the front or back?), or rotated.

 

I believe on these the line out terminals are directly connected to the front face socket. The US had enough trouble with miswires that they now use two double-pole switches, so the socket is isolated from both line-in and line-out when it's tripped, and they trip when miswired. We mostly skipped this by making it mandatory for all new domestic socket circuits to have the RCD at the switchboard.




103 posts

Master Geek


  #2524468 16-Jul-2020 23:46
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SO In summary:

 

 

 

the current way that it is connected works but it is NOT  RCD protected.

The below is the correct way to have the powerpoint RCD protected.

 

Can someone confirm if that is correct?

 

 

 


231 posts

Master Geek

Lifetime subscriber

  #2524478 17-Jul-2020 01:55
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Yes. This assumes there is only one cable at the outlet.


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