short circuit

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  1. Lee Gold

    Short circuit and break up cable on fault finding rig

    Can someone explain a short circuit And a break in a cable when fault finding please what is the meaning of them please. Was fault finding today on test rig
  2. P

    Rated short circuit capacity of a BS88-3 type C fuse?

    What is the rated short-circuit capacity of a BS88-3 type C fuse? They are typically manufactured to 80kA but what does the BS say?
  3. W

    MCB tripping time for 153.37A Short circuit L-N fault for 16A Type C MCB??

    I'm a qualified spark but studying building services engineering at uni and just need a little bit of advice to see if I'm going wrong. Trying to answer a question where we have a 16A Type B MCB, and a short circuit fault current of 153.37A. From fig 3.4 of regs we can see that for a fault...
    • walberto
    • Thread
    • 16a circuit fault mcb short short circuit time tripping type type c type c mcb
    • Replies: 8
    • Forum: UK Electrical Forum
  4. J

    BS 1361 main fuse short circuit capacity/overload at ka ratings explained.

    Hi. I am an apprentice electrician, and was wondering if anyone could help me as I'm getting confused with something that's probably quite simple. If I am correct to work out the amps running though an appliance you do w/voltage. So 10kw/240v = approx 42amps. Of I'm correct in this? My boss...
  5. R

    Mind the short circuit!

    Anybody ever taken note of the risk in trying to change the direction of run of a motor running in star-delta mode?
    • Realstylz
    • Thread
    • circuit motor short short circuit
    • Replies: 18
    • Forum: UK Electrical Forum
  6. H

    New Zealand "live" short circuit

    Hi all, I'm a translator, translating a Portuguese text into English that includes a list of electrical faults. One of those is described as a fault that occurs when you connect two positive poles in a circuit. What is that called in English? The literal translation of the Portuguese term is...
    • harshduck
    • Thread
    • circuit electrical live phase short short circuit
    • Replies: 3
    • Forum: UK Electrical Forum
  7. J

    Short circuit capacity & max zs

    Hi all. I tested a building last week where they had used bs 3871 and also bs 4293 rcbos/mcb's. I can't seem to find the ka of these and also the max zs permitted.
  8. J

    MCB short circuit capacity

    6 amp BS EN 60898 .....6ka being the maximum fault current the device can handle, although the device may no longer work after that. The 3 underneath this being the fault current (ka) the device can handle without damaging it and then being able to be reset. I have been told 2 different...
    • jamesBoater
    • Thread
    • being capacity circuit current device fault mcb rating short short circuit
    • Replies: 7
    • Forum: UK Electrical Forum
  9. i=p/u

    Short circuit current

    3.6v, 4 ah , em batt pack shorted in my pocket and burnt a hole in jumper, what current was flowing or was it the discharge , smokey, thx wise one
    • i=p/u
    • Thread
    • batteries battery circuit current resistance short short circuit
    • Replies: 9
    • Forum: UK Electrical Forum
  10. 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:
  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 electricians' talk ratings short short circuit
    • Replies: 8
    • Forum: UK Electrical Forum
  12. 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:
  13. 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?
  14. H

    Four core Power Cable Short Circuit

    Hello Everyone! Refer to the subject, please guide me in a situation, there is a power cable 25sq. mm, 4 core pvc/pvc non swa buried directly in ground and in some ducts.The cable has damaged anywhere and it shows short circuit between every conductor.I have tested with a uni-T multimeter, it...
    • hhhunzai
    • Thread
    • aus cable circuit core electricians' talk fault multimeter power resistance short short circuit
    • Replies: 17
    • Forum: Australia
  15. I

    How To Track A Short Circuit In A Lighting Circuit

    I am a DIY amateur electrician who has a problem with my kitchen lights. The fuse continually pops about 5 minutes after switching on the kitchen lights (a chandelier and 2 wall lights). The bulbs are low energy so total load is <100w and the problem occurs even when all of the bulbs are...
    • iangorrie
    • Thread
    • circuit electricians' talk how to insulation lighting lighting circuit lights meter resistance short short circuit track
    • Replies: 25
    • Forum: Lighting Forum
  16. C

    Short Circuit Capacity 3036 fuses

    can anyone tell me the short circuit capacity for BS.3036 rewireable fuses please.
    • chloebear
    • Thread
    • aus capacity circuit electricians' talk fuse fuses short short circuit
    • Replies: 5
    • Forum: Australia
  17. P

    Peak Short Circuit Current value on the SSEG form.

    I've looked at the easy MCS guide on here, and it's not clear, (in my eye's) to what value you place in the part where it asks for this. I've done a pscc test at the AC isolator with my fluke, and it's giving me a reading of 600A. Is this what they want? There's no mention of it on the SMA...
  18. L

    Impedance of short circuit path??

    Hi, Probably fairly simple but I'm learning. Have an example for working out fault current/disconnection times. "A 10mm PVC sheathed MI copper cable is short circuited when connected to a 400V supply. The impedance of the short circuit path is 0.1 ohms. Calculate the permissable disconnection...
  19. S

    Prospective Earth and Short Circuit Current, Earth Fault Impedence

    Hi I'm curent sudying for my 2330 and we have starting looking at the above, however I getting a little muddled/confused. Can someone please help me with some definitions and the us of the following, why we look at them? Prospevtive Short Circuit Current? Prospective Earth Fault Current...
    • steve100
    • Thread
    • aus circuit current earth electricians' talk fault short short circuit
    • Replies: 6
    • Forum: Australia
  20. K

    Prospective short circuit current test

    Hi all, fairly new to the forum so youll have to excuse my 'noobiness' as they say. I just watched this video of a guy showing how to carry out the above test. Prospective short circuit current test - YouTube This is taking place on a 3 phase supply. Does anyone know why he doubled the value...
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