DNO Isolation For Changing DB

[Eugene Herbst]

So how does each phase get to the flats? It can't be just tails there must be an isolator for each flat surely?

Supply is in a communal alcove in the basement (under the pavement). 3-Phase in and about 1.5mtrs away split into 4no BS1361 Type II Fuses (Landlord, Flat 1,2,3), another 1mtr away is EDF meters before heading off to each flat. In each flat adjacent to the DB is a metal junction box before entering the DB.

 

[telectrix]

Supply is in a communal alcove in the basement (under the pavement). 3-Phase in and about 1.5mtrs away split into 4no BS1361 Type II Fuses (Landlord, Flat 1,2,3), another 1mtr away is EDF meters before heading off to each flat. In each flat adjacent to the DB is a metal junction box before entering the DB.

that may be your answer. disconnect at the metal JB. take usual precaution of switch ing off DB 1st.

 

[Grant1987]

So how does each phase get to the flats? It can't be just tails there must be an isolator for each flat surely?

Yes there must be isolator for each flat no doubt about that.

 

[Vortigern]

So the three phase in cut-out must have it's own fuses and the 4 fuses you talk about can surely be the isolation point, oh for a photo.

 

[Grant1987]

Yes there must be isolator for each flat no doubt about that.

Usually 16mm twin and earth pvc with supplementary earth run with with it.
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Yes there must be isolator for each flat no doubt about that.

Usually 16mm twin and earth pvc with supplementary earth run with with it I’d hope.

 

[Cbuk2k2]

I don’t think I have ever met or worked with a sparks who have waited for the supplier to remove the cutout fuse,

the only jobs where the supplier has been needed to come to site is to either move a meter or replace a busted head

I hope your not implying that people cut the sacred seals on DNO cut outs ??
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Hi All,

I need to change a DB in a block of flats in central London (W2 postcode), where EDF can't give a date for at least 6 weeks to come and isolate the supply, but at the same time won't / can't give out a date after this, which makes no sense to me!
This is both options of just popping around and isolating until work is done or installing a smart meter with DP switchgear!
The supply is a standard 1361 Type II fuse, and i'm not too keen on cutting the tags!

Does anyone have alternative methods of isolating the supply so as to change the DB? Also what is the average cost nowadays for this?

TIA

You’ll find a list of DNO’s here

Energy terms explained

Definitions for general terms used on this website.

www.ofgem.gov.uk

These are the people you need to contact and not your energy supplier.

It’s becoming increasingly common for DNOs to have approved contractors who can install isolators for a small fee (it’s about £60 but will probably next £1000’s in London).

 

[davesparks]

Supply is in a communal alcove in the basement (under the pavement). 3-Phase in and about 1.5mtrs away split into 4no BS1361 Type II Fuses (Landlord, Flat 1,2,3), another 1mtr away is EDF meters before heading off to each flat. In each flat adjacent to the DB is a metal junction box before entering the DB.

Is there not any OCPD installed after the meter to protect the cable running to the flat?

What type of cable is running to the flat and how is it installed?

 

[Grant1987]

Is there not any OCPD installed after the meter to protect the cable running to the flat?

What type of cable is running to the flat and how is it installed?

Most definitely not if it’s the older flats then there will be a BS 5419 isolator so many permutations with this type of install, need a lot more detail to help the guy out

 

[davesparks]

Most definitely not if it’s the older flats then there will be a BS 5419 isolator so many permutations with this type of install, need a lot more detail to help the guy out

Why do you say most definately not?

 

[Dustydazzler]

cbuk2k2 , I would never advocate removing the seals

likwise would not advocate buying a big pack of meter seals off eBay for 4.99 so to redo Z removed seals so it looks like the fairy never came

(you can even buy genuine seals and re-sealing tool off x meter fitters off eBay)