Light switch reversed after transformer blew in the ceiling

[picklepass]

So do I change the red wires back to the L2 position or is it ok as it is ??

 

[JohnW2]

So do I change the red wires back to the L2 position or is it ok as it is ??

As I said before, it really makes no difference - and since it's now working the way you want, there's no point in changing it back.

Per stillp's recent question, can you confirm that there is just one pair of wires connecting the secondary of the transformer to the light, and that there are no other wires connected to the secondary?

Kind Regards, John

 

[stillp]

No. Check the wiring and find out what is or was wrong.

 

[picklepass]

whats the secondary not sure , can you tell from the photos

 

[stillp]

The secondary is the output side of the transformer. The primary is the input side. The secondary should only have 2 wires connected to it, and those should be connected to the lamp.

 

[securespark]

As I said:

I don't recall seeing all of the wiring in the ceiling, just the neutral loop and switchwire.

It has to be worth checking those connections are correct. The only other thing I would do as a spark is IR and EFLI tests. I have to assume (I know, I know!) the IR is OK because the CPD is not failing. On a DIY level, the earth loop could be tested by checking continuity between the ceiling light and the switch then between the switch and a socket, having first tested the socket with a socket and see.

I can't see there being a fault with the switch drop wiring, as if there was a break it would fail to close and if there were a short it would either operate the CPD (if the cpc was connected to a healthy earth) or the light would be on all the time (or intermittently). The salient point being the light would not operate consistently with the switch.

But it would be reassuring to know earth continuity is in place and that the wiring at the ceiling position is as it should be.

 

[securespark]

whats the secondary not sure , can you tell from the photos

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• picklepass
• 23 Oct 2013
• 1

on the transformer picture, on the left ( first lot of screws) is the wiring from the light itself, blue on the left brown on the right. The second lot of screws is the wire from the transformer to the wires in the ceiling, again blue on the left brown on the right

 

[picklepass]

yes on the photo the first set of wires are from the light , blue on the left brown on the right then the 2nd set of screws the wire is from the ceiling blue on the left brown on the right. Then it goes into the connector from the ceiling blue into the 2 black wires and brown into the single black wire

 

[JohnW2]

yes on the photo the first set of wires are from the light , blue on the left brown on the right then the 2nd set of screws the wire is from the ceiling blue on the left brown on the right. Then it goes into the connector from the ceiling blue into the 2 black wires and brown into the single black wire

That all sounds reasonable.

How long had the previous 'transformer' been in service before it blew up? Was the replacement identical to the original?

Kind Regards, John

 

[picklepass]

Approximately 3.5-4 years

 

[stillp]

yes on the photo the first set of wires are from the light , blue on the left brown on the right then the 2nd set of screws the wire is from the ceiling blue on the left brown on the right. Then it goes into the connector from the ceiling blue into the 2 black wires and brown into the single black wire

I can't see the wiring instructions from the transformer manufacturer. Could you post a photo of them please?

 

[picklepass]

Approximately 3.5-4 years

 

[picklepass]

Uploaded instructions

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• picklepass
• 24 Oct 2013
• 1

Untitled

• picklepass
• 24 Oct 2013
• 1

for the Transformer

 

[stillp]

Thanks. What I really wanted to see was a diagram, or markings on the case, telling you which wires connect to which terminals.

Are there any junction boxes in the circuit?

Sorry, I'm going to go quiet for the rest of the evening in 10 minutes or so. Be back tomorrow.

 

[riveralt]

Unfortunately those instructions are of little use.
Isn't there a diagram of the wiring arrangement required for the unit?