short

  1. S

    Pyro Cable Tripping RCD

    Went to a job in a church hall today where one of the power circuits was tripping the rcd. There seems to be 4 bad legs of pyro in the circuit, as I get a dead short in my IR tests between line/neutral, line/earth. Is it common for pyro cable to do this after a certain time, or could a fault...
    • sl1210
    • Thread
    • because cable church pyro rcd short tripping
    • Replies: 64
    • Forum: UK Electrical Forum
  2. S

    Current carrying capacity of ring circuit

    I am happy with calculating current carrying capacity for straight runs of cable. I am not to sure how the imact of a ring effects the cable calcs? Its hard to see what the possible loads might be. As of this do you take the center point and use maximum demand? So for example on a 35 meter ring...
  3. B

    rcd short circut

    my rcd 30ma trips everytime i put the iron on, it lasts a couple of minutes then trips , all sockets and lighting trip ,so its a big inconveinience,, any advice would be a great help. thanx,
    • bmc48
    • Thread
    • circuits leakage problem rcd replacement short trips
    • Replies: 9
    • Forum: UK Electrical Forum
  4. M

    overheating motors

    Can a motor overheat and short to earth if it is having to work to hard?There is no overload but the motor is protected by thermistors and a thermistor relay which cuts out on occasions. Its an intermittent fault but the Engineers that have watched the circuit say it trips the Main C/B. On a...
    • MatthewC
    • Thread
    • earth heating motor motors overheating protection short
    • Replies: 21
    • Forum: UK Electrical Forum
  5. G

    fuse thingies

    Hi Can anyone tell me where I can get one of those little fuse thingies that goes inside a 13 amp plug top?? I want an 8 amp one. Thanks for your help. :)
    • Geordie Spark
    • Thread
    • fuse never problem short
    • Replies: 49
    • Forum: UK Electrical Forum
  6. M

    IR Testing???

    Hi All- New to this - loving the challenges! EICR'd my house and found one of my ring finals had an IR problem- just getting to grips with testing and trying to gain experience- college was good, however, felt like it was more of learning to pass exams! My ring final has an issue- if i test...
    • mljc71
    • Thread
    • because between reading short something testing
    • Replies: 20
    • Forum: UK Electrical Forum
  7. S

    Dead Short after IR testing

    Just had a call off my electrician (one doing council work) He did a CU change - on testing he IR tested the lighting circuit (500v DC) and got acceptable readings. When he energized the circuit - RCD trips. Found a dead short between N and E. Investigating now to locate which run of...
    • Spazz
    • Thread
    • after ceiling dead lighting short testing
    • Replies: 18
    • Forum: UK Electrical Forum
  8. A

    how do I khow what is short circuit capacity (KA) on DEIC

    HI Can anyone help me understand how I work out the "short circuit capacity(KA)" for Domestic Electrical Installation Certificate. Sorry struggling with this one.:blush5:
  9. E

    dead short L-N but the fuse doesn't blow?

    when doing an inspection i came accross a radial circuit serving 4 points, the IR between L-N @500V was 0.00 Mohms, on continuity between L-N I got 25 ohms. when I then energised the circuit and clamped the live, no current being drawn. I have yet to take any fronts off as it was just an...
  10. Guitarist

    Supplies to outbuilding CU's

    Do you guys think that the majority of electricians actually bother using the adiabatic equation to decide whether the cpc of a T&E cable is adequate when supplying a CU in a garage/shed, or do most people just size the cable based on CCC and voltdrop? I come across a lot of T&E strung between...
  11. B

    Circuit breakers short circuit ratings

    Hi im looking for a list of Circuit Breaker short circuit capacity ratings, that i can stick into my BGB. list required would be for all fuse types, from BS 3036 to BS88. old and new types protective devices. Also is there such a thing as fuse wire sizes gauge card? if so can some one point me...
    • Bradzz
    • Thread
    • breaker breakers circuit circuit breakers ratings short short circuit
    • Replies: 8
    • Forum: UK Electrical Forum
  12. H

    A short introdustion

    Hi to you all, My name is Colin and I am a middle aged sparkie going down the grumpy old man route after looking at the state of our profession (Middle age is when a narrow waist and a broad mind always seem to exchange positions!!). I spent 8 years learning the job and the last 18 years taking...
  13. 1

    Bizarre dead short between Neutral and Earth

    Firstly, please let me explain the fault on the circuit HAS been rectified. This was achieved by splitting the offending circuit (kitchen ring) into two radials and putting each leg on their own 16A mcb on the same RCD. Attended a property to do some remedial works on the kitchen ring, New...
    • 1shortcircuit
    • Thread
    • between dead earth neutral short
    • Replies: 27
    • Forum: UK Electrical Forum
  14. C

    Moving CU all cable too short, acceptable method.

    Looked at a job today where the elderly occupants have the old rewirable fusebox tucked away high in a kitchen cupboard where neither of them can reach, or replace the fiddly fuse wire. They've asked me to price up replacing the CU with a split RCD unit but would also like it lowering so they...
  15. rustynails

    2392 Question - Balanced prospective short circuit current between lines

    The prospective short-circuit current between line and neutral is measured at 900A. The maximum balanced prospective short-circuit current level between lines, as a rule of thumb, can be assumed to be approximately: A: 0.9 kA B: 9 kA C: 90 kA D: 1.8 kA :banghead:
  16. D

    A first for everything, never expected this to cause a short.

    Check out the pics above; this was a callout to lost power in a factory, found 2 phases out blown 200amp fuses and a quick Meggar confirmed a short circuit between Y and B phases and unusual low readings to earth. id already isolated all outgoings and main switch was off to busbars but still...
  17. M

    What type of ADS is used for Short Circuit/Overload?

    I am at COLLEGE by the way, if your about to say join another trade or something lol. Also does RCD only operate if there is a earth leakage?
    • MattyH
    • Thread
    • circuit device earth fault operate short type used
    • Replies: 4
    • Forum: UK Electrical Forum
  18. O

    Family short breaks

    We've been to Centre Parcs on and off for a number of years and yes, as a family we do enjoy it but its not cheap. Looking for suggestions of places "like" Centre Parcs in the midlands/south which would have similar type offerings. Thanks.
  19. B

    200A OPD 3 phase short circuit capacity

    Hi all Any of you know whether there is a table or other source (other than waiting on hold for ages or opening the fuse covers)to find the short circuit capacity for a 200A main fuse in a 3 phase 40 year old supply? Also is it going to be BS88 or 1361?
  20. B

    Is it OK to "short-circuit a" PV module?

    I'm planning on installing the mechanical side of a PV array before I install the electrical components and I've heard that you can connect the positive and negative leads of each module together to short-circuit each module separately until you string them together. Is this true or would it...
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