PIR Sensor + Two core & earth (uninsulated)

[AdamCH]

Yes, the 12v lights are wired with an earth to the transformer & 2 core out to the lights.

 

[norm360]

So saying that I'd prefer it if people learned about things beforehand, and acquired a full and genuine understanding of how it worked and exactly what to do before they picked up a screwdriver was exerting my superiority and denigrating you, was it?

I'm afraid to say, more idle rhetoric from you. If everybody had a full and genuine understanding of electrics, would this forum even exist, other than for the likes of egocentrics like yourself to go about congratulating yourselves on your immense knowledge of electrics??

Somebody else has already posed a similar question in this thread with regards to reappropriating the CPC for neutral, so clearly the answer is not as obvious as it may seem.

EDIT: Having glanced about Google this is about the only mention I can find of earth not used as CPC. And contrary to what has already been said in this thread, says below you can resleeve the CPC of multicore cables.

The restriction against using G/Y as anything other than a CPC/earth, only applies to single core cables, here is an excerpt from 514.4.2: "Single core cables that are coloured green-and yellow throughout their length shall only be used as a protective conductor and shall not be over-marked at their terminations, except as permitted by Regulation 514.4.3."
Whith multicore cables such as flex, or SWA, it is allowed to oversleeve the exposed core another colour.

Read more: http://www.electriciansforums.co.uk...reen-yellow-not-cpc-2.html#post302443[/QUOTE]

To be clear, oversleeving non-insulated CPC is still not allowed.

 

[AdamCH]

Somebody else has already posed a similar question in this thread with regards to reappropriating the CPC for neutral, so clearly the answer is not as obvious as it may seem.

I shall deny it if he comes after me

 

[SaladFingers]

Still no guarantee the RCD would trip.

Yes it would, that's what they're for.

There'd be an inbalance and the RCD would trip. Unless the touchee is fully insulated.

 

[JohnW2]

Still no guarantee the RCD would trip.

Yes it would, that's what they're for. There'd be an inbalance and the RCD would trip. Unless the touchee is fully insulated.

Still no guarantee the RCD would trip.

Indeed, but the theory (hope) is that it would 'if it needed to' - i.e. if there were a path to earth through the person which resuted in at least 30mA flowing!

Kind Regards, John

 

[333rocky333]

Think Rf knows how they work.
Where do you propose this imbalanced current will flow to then
Standing on a wooden or carpeted floor its more likely very little current will flow if any.
Therefore as he said there is no guarantee it will trip

 

[AdamCH]

Am I right in thinking that some countries don't include an earth at all?

 

[SaladFingers]

Think Rf knows how they work.
Where do you propose this imbalanced current will flow to then
Standing on a wooden or carpeted floor its more likely very little current will flow if any.
Therefore as he said there is no guarantee it will trip

It didn't look like he knew.

Tell you what, stand on whatever floor you like, touch the phase and report back your findings.

Now, we all know what RCDs are for and yes there are different resistances of different paths, but a no gaurantee isn't going to make anyone feel safe.

 

[AdamCH]

Why don't you try an experiment fingers? Bang a nail through the live & see if it trips. Do it a couple of a hundred times just to make sure your findings are statistically significant.

 

[EFLImpudence]

Am I right in thinking that some countries don't include an earth at all?

Yes, but it is a safety measure.

 

[Iggifer]

Am I right in thinking that some countries don't include an earth at all?

yes but we do, so you are obliged to use it.

Also, some distribution systems do not use a Neutral for their supply (not the circuits obviously), that doesn't mean you can ignore the neutral here!

http://en.wikipedia.org/wiki/Single-wire_earth_return

 

[333rocky333]

.

Tell you what, .

Tell you what why dont you go back to the screwfix forum, instead of critisizing people here, which is what a majority of your posts are about

I would reather someone say theres no guarentee of tripping than give them a false sence of security to be honest
John gave the sensible answer

Rf myself and many others have both found peirced cables in situations where touching them would not have tripped an Rcd yet are still potentially dangerous.

Salad fingers , get yourself an insulation tester and go round your home and meggar between 10 points on your floor and a known earthed point and report back

 

[SaladFingers]

.

Tell you what, .

Tell you what why dont you go back to the screwfix forum, instead of critisizing people here, which is what a majority of your posts are about

I would reather someone say theres no guarentee of tripping than give them a false sence of security to be honest
John gave the sensible answer

Rf myself and many others have both found peirced cables in situations where touching them would not have tripped an Rcd yet are still potentially dangerous.

Salad fingers , get yourself an insulation tester and go round your home and meggar between 10 points on your floor and a known earthed point and report back

Criticising? No that's bas's job and what a majority of his posts are.

And screfix is a bas thing, not a mine. I can't go back to where I have not come from.

Now, you say your rather have a no guarantee than a false sense of security. Well a no guarantee is hardly any sense of security.

Explain how a pierced cable is potentially dangerous if not enough current would flow to trip an rcd?

 

[Bill Stickers]

So if you received a 29mA shock for god knows how long you'd walk away absolutely unharmed would you?

 

[SaladFingers]

So if you received a 29mA shock for god knows how long you'd walk away absolutely unharmed would you?

I'd imagine a heavy tingling sensation