415v ~ in your house?

[theroadblock]

Heres one for you guys, not sure if you've ever given it a thought but an operator at my workplace today mentioned that he keeps having power dips / losses to every other house in his street, so obv i thought 'ok there is probably some issue with one of phases supplying your area'. anyway so he confirms this by telling me his nextdoor neighbor still has power when this occurs, andso, he went and did the dreaded and now has a.. wait for it... socket outlet in his house that is supplied from nextdoors supply (with their permission ofcourse...). now apart from the obvious things wrong with doing such a thing, surely there is the potential of 415v should a fault possibly occur between the two houses.. scary stuff... mg_smile:

 

[rmc86uk]

I disagree Darkwood because at that one point there is only 230v present so putting a 400v sticker is misleading. As with the above posts where exactly would you put the sticker?

 

[Darkwood]

I disagree Darkwood because at that one point there is only 230v present so putting a 400v sticker is misleading. As with the above posts where exactly would you put the sticker?

Your missing the theme if its between points you put a label that 400v exists between adjacent points not a 400v sticker on its own as yes agree that would be misleading.

 

[GLENNSPARK]

I have a three phase 100A supply to my house, nothing wrong with that at all, feeds three separate dis boards and all is well. lol mind you I do have a rather big house 9 bedrooms at the last count lol

and what would this little snippit of ostentatious posturing have to do with owt?...
so, how much does a bedroom use....
lucky if a typical bedroom pulls more than a few amp....unless each one has an on suite shower that is...lol...

 

[rmc86uk]

Your missing the theme if its between points you put a label that 400v exists between adjacent points not a 400v sticker on its own as yes agree that would be misleading.

I see what your saying but having sticker that would say between adjacent points although I've never seen this. I would put one on an individual point if it was 400v. Also why the need to put 400v labels on if we don't put 230v labels on?

 

[Darkwood]

I see what your saying but having sticker that would say between adjacent points although I've never seen this. I would put one on an individual point if it was 400v. Also why the need to put 400v labels on if we don't put 230v labels on?

Please refer to the regulation .... it is just to cover situations where 400v is present at or between point where you would normally expect 230v..... so a light switch would normally expect to have no more than 230v at it but when you have more then 1ph there then you need to show this in a warning label ...i can't i understand how clearer this regulation can be.. its like your responding without reading the regulation ... 514.10.1 please read its self explanatory.

 

[rmc86uk]

I never said it wasn't a regulation and you don't have to explain to me on why a 400v label should be applied! I said and others on here also that if two points within reach on different phases where would you put the 400v label e.g as posted on the wall with arrows pointing to each socket!

 

[Tuttle]

I don't get it, but maybe I'm missing something? ...

514.10.1 Every item of equipment or enclosure within which a nominal voltage exceeding 230 volts to earth exists and where the presence of such a voltage would not normally be expected, shall be so arranged that before access is gained to a live part, a warning of the maximum voltage present is clearly visible.

As far as I can see it only mentions voltage to earth within an enclosure.

Like I said in an earlier post, I notice that the rest of 514.10.1 disappeared in AM1. Are you using the old red book, or am I missing something?

 

[rmc86uk]

Thanks Tuttle.

 

[odawire]

I don't get it, but maybe I'm missing something? ...

514.10.1 Every item of equipment or enclosure within which a nominal voltage exceeding 230 volts to earth exists and where the presence of such a voltage would not normally be expected, shall be so arranged that before access is gained to a live part, a warning of the maximum voltage present is clearly visible.

As far as I can see it only mentions voltage to earth within an enclosure.

Like I said in an earlier post, I notice that the rest of 514.10.1 disappeared in AM1. Are you using the old red book, or am I missing something?

Ah, yes I was looking at the red book, so the rest went in AM1? wonder why

 

[Darkwood]

Well if it been dropped i need to add that to my memory banks.... i have the red book at home and the green book on site where it matters ....... sometimes you can never keep up with the changes but it about time it was dropped ....as i said earlier anyone venturing into such power outlets etc should be so qualified and test accordingly so why it existed in the first place is a mystery.

 

[Stroppy]

Installed Dado in a school and there was two rings on two different phases. A bloke mentioned that it was possible to to get 400v between two sockets and the engineer said years ago it would have mattered but now it doesn't. Not sure if it's a regulation or not.

As a former computer engineer I can tell you it absolutely definitely still matters.

Separate machines linked together with data cables such as a computer and printer will not care, as they are not linked at a 230v AC level, however many larger computer have multiple power supplies for fault tolerance, where there are two (or more) IEC/BS1363 leads that need to be plugged in to sockets (or more usually through a UPS).

Some fault tolerant systems have completely separate power supplies, and may not care if each is on a different phase as their outputs are 5 and 12v DC, but others have two leads feeding one power supply, and they will definitely get upset as if they are connected to different phases, as they are both expecting 230V in a single waveform but will find themselves with 400V if plugged into outlets on different phases.