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incomer

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  1. S

    Help ideas on moving a main Incomer

    Hi guys, I have just picked up the keys to my new house, the Incomer is exposed under the stairs and looks a mess, I will be doing a gradual rewire as we revamp the house over time but firstly I will be sticking a new CU on. Now if you look at the pics what would you guys do with this? I want...
  2. M

    Swa main incomer size

    Hi just after some help. It's a high rise block new install. Dno are wiring up to the Ryefield board then to the meter. Then there will be an isolator and then run to each flat cu. question is what size cable. I've been told 3 core 25 mm swa but this seems a bit excessive for 100a dp main switch...
  3. Energetic

    Does a TT Earth 0.13Ohms require a 100mA incomer?

    Had an interesting one this week, customer assures me he's on TT, DNO days the same but i'm getting 0.13Ohms on the Ze, never seen it that low befor. There's no 100mA RCD on the supply and it doesn't look as if there's ever been one, so with that reading i'd assumed it was a TN system... so my...
  4. N

    3 Phase Dis Board Incomer

    Having a quick discussion in work with regards to sizing the main incomer of a three phase dis board. Can someone please tell me how the correct way to size the main incomer of a three phase board or single phase for that matter Cheers Folks
  5. M

    Help on mains power

    Hi, went to to look at a job last week where the builder proposes that the new electrical installation will require 135amp three phase. However the the main incomer to the site only seems to be 100 amp three phase and a 25 mm incomer. i have calculated that the run from the main incomer to...
  6. M

    2 core SWA sub main in domestic flats

    Hi all, so what would be your plan of attack..... Gone to have a quick look at some remedial/maintenance on a domestic flat within listed building. Mixed occupancy of rented and owned. Owner not present but another person lets me in. Im told metering equipment and incomer is in basement but...
  7. B

    Cast Iron Incomer

    Just a bit of advice from you guys. Seem to be coming across these a lot recently in old houses-cast iron main fuse on the DNO side, prior to the meter. Told customers to approach DNO and get them to replace. Does anyone know if the DNO's are charging for this service? The last one I went to...
  8. H

    Incomer

    2 x 25 mm tails and a 16mm earth as the main incomer ! Never saw this before has anyone else? Couldn't find where they when,t too.. Don't they have to be 3 m max? Cheers
  9. H

    Current Capacity of a main incomer cable

    We have a main incoming cable coming into a factory unit where I think the size is 300mm 4c. The cable head says 400. Is this the current carrying capacity of the cable or just the model number of the cable head box? I can't get a definitive answer even from Scottish Power!!! Thanks. Hutch
  10. P

    Busbar Diffrential protection for 2 Incomer & 1 Buscoupler logic ( 2 out of 3)

    In system of 6.6kv there is busbar differential protection is provided. The operating philosophy is of 2 incomer & 1 buscoulpers ( With TWO incomers ON & Buscopler OFF). The differential scheme is of 2X87 type ( respective bus has its differential protection) Case -1 TWO incomers ON &...
  11. D

    Oak framed garage with plastic water pipe incomer, do I need to bond?

    I realise this question has been asked in all sorts of different ways before but I would like your opinions on the following, I have an oak framed garage with accommodation upstairs, the water comes in via a plastic incomer, once in the property (behind the sink) it then connects to a copper...
  12. S

    SMA4000TL grid voltage too high

    I think I read that this unit can be adjusted in case of high grid volts or fit a G59 relay? Client is getting 257-259v and it is tripping. It is a rural location and rather not get DNO involved if it can be sorted on site. Did I read that right? Thanks
  13. M

    Henley incomer

    Does anyone know the BS number and charateristics of the big square henley incoming fuse used by the supply company. its about 6 inch square with side entry for the supply cable system is TN-S. There is no info on it and i take it the main fuse is inside its sealed so dont know the size. any...
  14. R

    Max allowed on 60amp incomer

    My cleint has a small holiday lodge and wanting to remove hot water cylinder and night storage heaters and replace with instanious water heater and panel heaters. As he is only in lodge a day here and there. The plan is to replace old fuse box with new 17th ed consumer unit. Which will include a...
  15. E

    Domestic Incomer Fuse

    Hello every one, I would like to know the BS number of supply fuse that I came across in a house we recently rewired. The fuse has a glass cyliner filled with small multi coloured sand like grains most likely silicone. I have never seen this before. The rating is 60A. Any input will be highly...
  16. D

    Plastic water incomer-

    Hi lads. Doin a new build log holiday home. Water main is plastic into the cabin then goes Into a bit of surface copper round the tank then back to plastic for all hidden pipe work. Do I need a main bond?
  17. K

    N-E joined at the incomer of your house

    I was just wondering with the N-E being joined at the incomer, if i was to go downstream of a circuit which was "NOT" Rcd protected and tested between Neutral and Earth that would appear as a dead short between N-E is that correct? but if i was to go downstream of a RCD protected it wont be...
  18. J

    13.8 KV incomer and bus-tie major failure

    good day guys, I badly in need of your comments with regards to electrical protection system. The issue took a place when we tried to run a motor with rated power of 600 KW, 13.8 KV and rated current of 30 Amps. This motor fed from ABB switchgear with tow incomers and normally closed bus tie...
  19. D

    Dont mess with the incomer!

    Started my first job for a new builder today (nice guy). I was wiring some lights in a conservatory while he was behind me attacking the concrete floor with a hammer and chisel. BANG!!! wtf?!! Poor guy is now on the other side of the room, straight through a sheet of platerboard, right hand...
  20. leespeed

    main earth from incomer

    a 16mm earth cable bonded onto the main feed of a tns system with a bonding clamp .obviously this needs rectifiying by the (supplier) no m.e.t. from incomer,,would they retifiy it

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