Three phase supplying a domestic flat.

[Fred Faulkner]

Hi guys,

i had a look at a building in the west end of london which is spilt into 10 flats this weekend to do some upgrading works to the landlord area.

i noticed that there was originally 6 flats and the landlord must of added an addition 4 flats on top. Called 10 9 8 7. ( obviously).

The issue is that there has been a 3 phase submain wired in swa from the ground floor ryefield board . Which is then terminated into a 3 phase board installed outside flat 10/9 . From this board they have wired the two flats using all three phases therefore giving a potential of 400v across the circuits installed into the flats!!

i.e
flat 10 1L1 - lighting
flat 10 1l2 - smoke alarms
flat 10 1l3 - sockets
flat 10 2L1 - cooker

flat 9 is the same i.e
3L1 lighting
3l2 smokes etc etc!

this senario is the same for flat 8 7 !

im sure this is hugely wrong!!!

 

[telectrix]

They could be Penthouse suites:

The Emma Clancy Suite, The Tony Cable Suite, ...

i which case there'd need to be a rod with <100ohms Ra.

 

[Knobhead]

The load balancing is cr@p. If there’s ten flats with say 5 sub-boards the balancing should be coordinated across all boards. Not difficult if you take the time to work through it logically.

As for the 400V on lighting, unless the light switches for flat 10 are in flat 9 where’s the problem? As long as each flat is a separate entity there is no problem.

 

[trev]

Really good advice mate , why do you bother ?

How about, because he knows what he's talking about.

 

[Silly Sausage]

How the hell are they doing the metering?!?!

 

[Knobhead]

I was wondering that.

It can only be services included. It would be interesting if someone bitches about their share of the bill.