final | Page 10

final

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  1. S

    Radial final circuits in garage

    Situtation is a new, small garage (16 sq m) fed from the house via a 16A mcb and 30mA main RCD. I am doing my own installation under a Building Notice to the local council building control dept. Plans filed with the application are for a garage unit with 1 x 6A mcb for lighting, and 1 x 16A mcb...
  2. A

    continuity of ring final circuit

    Hi Just doing end to end test line - line 0.51ohms seems fine cpc-cpc 0.91 ohms seems fine But N- N reading is coming up 1.46 Kilo ohms ??!!! any thoughts I am doing 2392-10 and am fairly green.............be gentle angus
  3. S

    Ring Final Circuit advise query

    Hi guys, Would be interested to hear your thoughts on the following. I had to change a CU in a hoarders property in January which proved to be quite a challenge. CU was damaged with accessible live parts so I had no choice. Clutter was extreme with hardly any access to some rooms so couldn't get...
  4. B

    Distribution of load on a ring final for Voltage drop calcs?

    Just pondering my voltage drop calcs for a fused spur off a ring final. Additional circuit will be around 15-20m long so I though I should do this properly.... My problem is calculating the voltage drop in the existing ring to the point of the spur which of course depends on distribution of...
  5. ringer

    Continuity of ring final circuit conductors

    Why is it when you cross connect the conductors at each leg and then test continuity, the result is one quarter of the combined resistances of the legs? I am usually pretty good at seeing how/why calculations work out, but just cannot in this case get my head around why the value measured is a...
  6. M

    Ring final circuit

    Hi Guys Can someone tell me please what is the difference between a ring main and a ring final circuit.....thanks in advance
  7. Y

    extend ring final

    Hi Chaps I am just starting out in this profession and eager to learn so sorry if questions seem a bit daft. If you need extend a second floor ring main which runs through four rooms by a further two sockets , and you have no idea where the first or last socket is where do you break into the...
  8. F

    No cpc continuity on ring final

    Hi all, Had a call from a customer saying her oven had broken. When the oven engineer went out he fixed the oven but told her she had "no earth on her kitchen sockets".?!?! He told her the other circuits ie the lounge and cooker, were ok but no earth to the kitchen ring final?! How can this be...
  9. N

    LED bulbs Dim glow!!!!

    I went out to a property today and the tenant had 6 down lights connected to a 3 way switch system. The down lights worked great! When the tenant installed LED bulbs there seemed to be a dim glow from the bulbs. The bulbs are 240V 2W. When the switches are off there is 47V at the fittings. Can...
  10. M

    Separation of circuits 314.4

    Hello, I'm doing a periodic inspection and am unsure weather to fault this, I have a generator which is the source of my supply, this then feeds two main distribution panels out of the main switch. So there is two 3 phase supply cables out of one MCCB. Does 314.4 come into play or does it...
  11. Baker1988

    Dangers of ring final circuit

    Hi i have been set some home work from college to find out why ring final circuits are dangerous. I know the obvious that if one leg on the ring breaks it will not be a full ring and the 32 amp mcb will be too big for the cable as it will only be able to carry about 20 amps with out it been a...

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