Changing pull cord for PIR - wiring confusion...


Postby mdemetri2 » Mon Sep 01, 2008 10:20 am

Hi there,

I have a bathroom pull cord that I would like to change to a flush mounted PIR. However on pulling down the existing pull core I find three wires - two of which are in one terminal and the other on its own.

The colour of the cables are all the same too - red with green on them - the house is approx 30 years old.

How do I identify which is live and which is neutral so that I can connect up the PIR?

Thank you in advance.
mdemetri2
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Joined: Fri Apr 27, 2007 1:34 pm

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Postby BLAKEY1963 » Mon Sep 01, 2008 4:11 pm

[quote="mdemetri2"]Hi there,

I have a bathroom pull cord that I would like to change to a flush mounted PIR. However on pulling down the existing pull core I find three wires - two of which are in one terminal and the other on its own.

The colour of the cables are all the same too - red with green on them - the house is approx 30 years old.

How do I identify which is live and which is neutral so that I can connect up the PIR?

Thank you in advance.[/quote]

MEDEMETRI2

Sounds like u have the one red as the switch wire ( live )
that probaly goes to the bathroom light.
The other two reds r probaly live feeds in and out of the
switch.
I do not think that u have a neutral at the switch , because
of the age of the wiring and method used ( 2 lives 1 in and
1 out and a switch wire ).
ONE would have to rewire a format where a neutral
connection could be provided .
I would advise to consult an electrcian on this , and
at the same time talk over issues of wiring age and
any part obligations that u may b liable 2 .

BLAKEY1963
BLAKEY1963
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Joined: Wed Jun 13, 2007 10:57 pm


Postby mephistico » Mon Sep 01, 2008 4:30 pm

A triac based PIR doesn't need a neutral. It an alternative.
mephistico
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Joined: Sun Aug 31, 2008 6:23 am


Postby BLAKEY1963 » Tue Sep 02, 2008 8:04 pm

[quote="mephistico"]A triac based PIR doesn't need a neutral. It an alternative.[/quote]

MEPHISTICO

Yes i agree , its all according which P.I.R model
has been purchased by mdemetri2

BLAKEY1963
BLAKEY1963
Posts: 654
Joined: Wed Jun 13, 2007 10:57 pm


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