length

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  1. D

    length of ring main

    Hi all what is the maximun length of a ring main in 2.5 te can you install as doing an extension in a bungaloe and the board is the other side of the building we going to be protecting the circuit with a 20amp mcb no larage loads as it feeds bedroom and lounges there will be no insulation on the...
  2. S

    Volt drop theories

    I've yet to come across this problem but like every good scout I like to be prepared. If a circuit is over the maximum volt drop permitted but fixed in the length of the circuit, how would you over come this? Would it be a simple case of using cable with bigger csa? Does anyone else know of...
  3. X

    Help. Any way to measure the length of a self regulating trace heating cable?

    Here's the problem. We have a self regulating trace heating tape installed on a piping process line where we need to know the length of the tape. The tape was estimated to be 10 metres (approx 32.8 feet). However the guys who installed it have reported that they have installed 19 metres...
    • xwhitemousex
    • Thread
    • aus cable heating help length measure metres self trace
    • Replies: 3
    • Forum: Australia
  4. B

    max length for main cable supplying single phase sub board

    hi all is there a regulation for a single phase board in a domestic property which is going to supply (from mains) a seperate sub board for an additional installation.ie a garage, is there a minimum requirement for size and length of new mains cable supplying the new sub board,also does having a...
    • bobby101
    • Thread
    • aus board cable check garage length main mains max phase property single single phase supplying
    • Replies: 2
    • Forum: Australia
  5. mrloy99

    ring circuit length concerns

    I have just recently started a new job-its a nursing home and I have been giving the work of 1st & 2nd fix to the 60 odd ensuite rooms.The job is on 2 floors and there is only one dist board on each floor.I have been instructed by the foreman to wire one ring(and one lighting circuit) to do a...
  6. S

    Getting 10mm T&E in 25mm conduit

    Is it possible and how much would a 3m length of 25mm conduit cost
  7. S

    First installation

    Anybody had any problems using a Schuco fixing brackets with curved clay tiles? Also, does it matter whether you use the pos or neg for the long cable back to the isolator?
  8. W

    Cable length limit from table 7.1

    Evening all Hopeully someone can help me get my head around this. I'm looking at table 7.1 OSG. For the 1361/3036 45A radials on a TN-S system the limiting factor is sc, which means its limited by the line to neutral loop impedance (short circuit). But the TNC-S it isn't. Can't see what the...
    • wattsy
    • Thread
    • aus cable length limit table
    • Replies: 3
    • Forum: Australia
  9. T

    Replacing underfloor heating probe

    Has anyone ever had to replace an underfloor heating temperature probe? I know there supposed to last but if one ever did fail I can't see how it can be replaced, it comes with a length of flexible conduit, easy enough to pull the old one out, but would be a nightmare slide a new one in...
    • TPES
    • Thread
    • aus conduit heating length probe replacing underfloor underfloor heating
    • Replies: 2
    • Forum: Australia
  10. T

    Maximum cable length

    Does anyone know the maximum cable length that can be used for a ring circuit using 2.5 t+e with a 32amp breaker?
    • ted26
    • Thread
    • aus cable length maximum
    • Replies: 25
    • Forum: Australia
  11. J

    meter tails maximum length

    Hello, Relating to a house/domestic installation, is there a maximum length for 25mm meter tails? I have got it into my head (old age creeping in!) that it is a metre - need confirmation/advice about this from any kind souls watching. Thank you, from member's first posting.:o
    • jdslimma
    • Thread
    • aus length maximum meter meter tails tails
    • Replies: 10
    • Forum: Australia
  12. E

    Voltage drop calculation format

    VOLTAGE DROP CALCULATION FORMAT hi my friends, is anybody have voltage drop calculation format? AND THERE BEEN SOME CHANGING OF OPINIONS AND ADVICES AS FOLLOW 1ST REPLY Shabu there's a few ways of calculating volt drop, the vast majority provide you with an "average" assuming the load is...
  13. V

    Maximum Cable Length??

    can someone please help me with this question There is a 40A BS88 fuse, protecting a 10mm cable with a 4mm Earth, it is wired to Reference method C, supply is TNS and it is protected by a 30mA RCD. What is the maximum length the cable can be? (thats all the info i have! I haven't been to...
    • videz6
    • Thread
    • aus cable length maximum
    • Replies: 19
    • Forum: Australia
  14. V

    Maximum Cable Length!

    can someone please help me with this question There is a 40A BS88 fuse, protecting a 10mm cable with a 4mm Earth, it is wired to Reference method C, supply is TNS and it is protected by a 30mA RCD. What is the maximum length the cable can be? (thats all the info i have! I haven't been to...
  15. N

    Voltage Drop

    We are all familiar with the requirements for measuring Zs and verifying that it is within the limits for the particular type of protective device. I use a single guide of 1.2 ohms as the maximum though there are of course many variations. What we (I) have not been noting is (R1+ Rn) and the...
  16. Golden_Boy

    Voltage Drop

    Why all the complicated formulea for working out voltage drop? Why not just connect the load and measure the voltage with a meter?:confused:
    • Golden_Boy
    • Thread
    • aus cable circuit length maximum voltage voltage drop volts
    • Replies: 19
    • Forum: Australia
  17. R

    hey guys continuity testing

    hey guys i am studying for my C&G level 3 and i have my practical inspection and testing next week and i cant find anywhere thae values that are aceptable when you read continuity on a lighting circuit for instances and they havent told us at college i presume it is somethning to do with the...
  18. L

    how do I work this out

    A 1.5mm2 conductor has a design current of 4 a and a length of 10 meters. its volt drop is 29 mv/A/m what is the volt drop across the terminals. Can anyone show me how to work this nasty little bugger out Answers are 11.6v 17.4 v 1.16v 1.74 v
    • lofty84
    • Thread
    • answer aus because electrical work length metre out volts work
    • Replies: 8
    • Forum: Australia
  19. S

    fused spur cable length???

    i recently had to add a spur from a ring to supply a item of fixed equipment. I took the supply from a socket into to a switched fused spur and placed the necessary fuse for the equipment directly after the socket then a 10 meter cable run to a flex outlet connection unit then a 0.5m flex cord...
    • scott.rick
    • Thread
    • aus cable equipment fuse fused fused spur isolation length means spur
    • Replies: 25
    • Forum: Australia
  20. O

    swiched fused isolator

    just doing a re wire and repositioning CU, a friend of mine told me that i would have to fit a fused isolator to the tails, is this correct

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