3 phase?

[ProDave]

I can't see any of your attachments in post #9 either.

Perhaps one of the admins can see it and will re post it. I don't know why this sometimes happens that some members can see the attachments and others can't.

 

[m4tty]

I can't either from iPhone safari

 

[steptoe]

I told yous I had sussed out why it does this, but no,

oh no, nobody wanted to listen,

:C

 

[buddha]

I told yous I had sussed out why it does this, but no,oh no, nobody wanted to listen,

:C

why does it do this mate?

---------- Post Auto-Merged at 20:37 ---------- Previous post was made at 20:31 ----------

View attachment 4116

 

[buddha]

View attachment 4119:Neil:Neil:Neil:Neil:Neil:Neil

 

[buddha]

think ive cracked it

 

[buddha]

View attachment 4123

so when ive attached image,i have to go to the advanced options and to manage attachment ,drag into lower box,and press inline

 

[ProDave]

In post #26 and post #28 I'm seeing all but the last of the photo's you have linked to.

Anyway it still looks single phase. VERY optimistic feeding four flats from one 100A single phase incomer. I think whoever made that 415V label made a mistake.

 

[Andy™]

still looks single phase, but with a enclosure thats normally used for TP, which is probably why it says 415v

 

[buddha]

View attachment 4126View attachment 4127View attachment 4128View attachment 4129

and this is the pub,with perhaps more potential load than my small block of flats,single phase?!

 

[Sidewinder]

Be interesting to know if the efli for those c63's is within spec!

 

[kelvfoozinda]

I expect in the rhyfield unit above the head (distribution board with a rack of 100A fuses inside it) they have looped the one phase to all phases instead of the builder paying for a 3p cable to be put in/jointing etc..

 

[buddha]

I expect in the rhyfield unit above the head (distribution board with a rack of 100A fuses inside it) they have looped the one phase to all phases instead of the builder paying for a 3p cable to be put in/jointing etc..

?

 

[Evans Electric]

As said above , I too think its a bit optimistic to feed four flats from one 100A SP supply , I wonder if it gets warm when everyones' cooking etc.

I've done loads of ordinary houses turned into two flats , one up one down, where the DNO just leave the original 100A STA SP supply cable . Never had a problem TBH .

Years ago my M8's firm did a Design & install for a large multi occupancy block of flats , don't know how many flats (lots) . Not being used to the discrimination used by the DNOs they asked for a gi-normous supply . "No chance " say DNO " you can have 300A , don't worry it'll be fine "

And so it was . M8 was thinking the same as me , OMG!!! all the cookers and showers getting switched on ....but think about it ..thats why we have HRC fuses.

 

[kelvfoozinda]

The discrimination on DNO supplies is silly. Even then i've installed 200A 3p stuff for heating systems with 11x50A flat supplies and afterwards checked the load at full capacity in a cold winter with only around 60A per phase!

Was there not a story a little while ago in pro electrician about down rating DNO fuses to 60 or 80Amp to "relieve stress on the network"?

 

[batty]

So to relieve the stress on the network they hope a few customers will blow there main fuse?

 

[kme]

I used to do all the sparking in 13 blocks of flats, round the corner from me. Purpose built as blocks of 4, 2 bed flats.

Incomer is a single concentric (TT) ( o.d. approx 20mm), daisy-chained into four HEDs, each with its own 60A fuse.

A couple of the flats used to report "fish smells" from the hallway.....in all bar one case, it was the concentric getting very hot. ( the "other" case - you don`t want to know :red card )