3 phase?

[buddha]

this is the supply to the building I live in ,four flats,says 415v,looks like a small cable,and only one fuse?

 

[buddha]

slightly impressed with myself for uploading photo haha.........but not for knowing what it is!

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View attachment 4100says 415v on baige box,must be 3 phase for 4 flats right? couldnt see 3 fuses

 

[Technician]

This is a single phase TN-C-S system.

Hence the PME (Protective Multiple

Earthing)

Is that earthing conductor to the right

continuous?

 

[samson337]

That's single phase, most have 415 written on them.

 

[Revved Up Sparky]

+1, it's a single cored cable. The metal sheath acts as both neutral and earth.

 

[sb_89]

I'd be more inclined to think it was a two core cable .....

 

[Technician]

I'd be more inclined to think it was a two core cable .....

Come off it sb; Look at the size.

That would be a TN-S system with

no label indicating PME if it was a

two core, and larger.

 

[sb_89]

Unless its split concentric and u don't count the other sleeves conductors as cores ?

 

[buddha]

This is a single phase TN-C-S system.Hence the PME (Protective Multiple

Earthing)

Is that earthing conductor to the right

continuous?

no it goes into a bit of t-block,should it be in an earthing block? Ive lived here for two years,its a hundred amp fuse,think we've all got gas ovens though.

I saw the same thing at a job my boss took me to and left me at changing switch plates,it was a pub,had three fuse boards,only one fuse on the head,so by the same token this also must be single phase?I'll find a photo

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View attachment 4101View attachment 4102View attachment 4103View attachment 4104View attachment 4105View attachment 4106View attachment 4107View attachment 4108View attachment 4109View attachment 4110View attachment 4111View attachment 4112View attachment 4113View attachment 4114

whoops,thought id cracked how to upload photos,done a few too many here

 

[Andy™]

Unless its split concentric and u don't count the other sleeves conductors as cores ?

It wont be split con. it will be straight con

 

[buddha]

the last and first are the photos id planned to put up,getting the select and shift button wrong ; (

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thanks everyone,was just surprised 100amp fuse could handle 4 modern (well mine a bit shabby) flats,working on the pub job made me have a look at mine,i was more surprised with the pub,what with the two floors above it,bar and cellar/cool room,seemed to be tonnes of eqipment,oh and a big industrial looking kitchen with 5 micro waves!!

 

[Technician]

Were the flats once a

large house?

 

[buddha]

yes mate

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http://www.talk.electricianforum.co.uk/attachment.php?attachmentid=4101 just experimenting with photos

i can see its tn-s metallic sheath as earth,one fuse one phase,surprised me,thought it might be my inexperience,and different type of 3 phase supply

 

[Technician]

Thought so; quite a lot of houses

around Leeds, University area just

like this.

Being older they are usually TN-S.

 

[ProDave]

So let's see a picture of the box above, the one that says 415V on it.

 

[buddha]

So let's see a picture of the box above, the one that says 415V on it.

what one dave?the last picture of the head at pub?

 

[Technician]

I think he means the flat.

 

[buddha]

http://www.talk.electricianforum.co.uk/attachment.php?attachmentid=4100

oh ok this is it mate(my block)

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if you click on it it gets bigger,you can see it

 

[ProDave]

Invalid attachment. Why does the forum keep doing that?

 

[buddha]

Invalid attachment. Why does the forum keep doing that?

comes up when I click it,maybe ive put it up wrong,the attachment is on one of the early posts dave,i wonder if it will come up then?