maximum

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  1. sythai

    Maximum Demand... 3phase

    Looking at job this week, involving fair bit of additional 3phase equipment... Just wondering how to go about calculating maximum demand + diversity for this ? Any Ideas please?
    • sythai
    • Thread
    • 3phase aus demand maximum
    • Replies: 0
    • Forum: Australia
  2. 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
  3. 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...
  4. 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...
  5. H

    maximum Zs

    for a TT system in domestic house with 0.2 disconnection time, with either mcbs or fuses. do i use the max Zs values in Tables 41.2- 41.4 which have 0.4 and 5 s disconnection times ? obviously depending on type of circuit.
  6. D

    Maximum Demand Load (Certs)

    Hi guys, ready for it yet another blonde moment from me, trying to get my head round my training. Regarding Maximum Demand load Amp/kA on the certificate If you have an existing installation you can measure the maximum demand load by by switching almost everything on the circuits and...
  7. 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
  8. 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...
  9. 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
  10. C

    Maximum length of Main Bonding

    I did find the answer pretty much to this in an old thread & was answered by Chris... But wonder if I could get a few more suggestions as to being correct. Installed a Main Water Bond from a DB Board to the Main Incoming water supply which was (in my opinion) well over 25m away. We ran it along...
  11. C

    Maximum number of conductors in MCB for radial circuit?

    I can't find anything in the regs. On a ring it's fine to run a spur from the MCB (so 3x2.5mm). On a radial technically it doesn't matter where connections are made to the circuit as long as the cable at any given position can withstand the load. So how many connections from the MCB would be...
  12. madeinengland

    maximum demand.

    i have my 2392 practical coming up.i'm fairly confident of the testing to be done on the board. the problem i'm gonna have is the three certificates to fill in. schedule of tests i'm fine with. schedule and inspections i'm ok with. but the certificate itself i haven't even seen and we've been...
  13. S

    rcd

    can anyone explain what is the rating for on a rcd device not the 30ma but te 63amp or 80amp. im a little confused as they dont provide overcurrent protection. cheers
    • soulman
    • Thread
    • aus current device maximum protection rating rcd
    • Replies: 3
    • Forum: Australia
  14. E

    Whats maximum allowable length of tails from meter to CU

    Hi all , Is there a maximum length for domestic meter tails ? I have a friend who wants to move his consumer unit to a different position without the expense of paying for the meter to be moved. Just wondered if the c.s.a. of the meter tails is spec'd correctley and protected is there a...
  15. J

    Maximum Cable Length

    Ok. I've been trying to get my head round this all day but I'm getting nowhere. On page 45 of the OSG (Table 7.1) it says the maximum length of a lighting circuit wired in 1.5/1.0 cable on a 6 amp Type B MCB is 90 meters. However, working out the voltage drop for this length of cable I'm...
  16. R

    Installing a supply for an arc welder in a domestic environment

    I recently picked up a job to install some power and lighting in a new small shed/workshop being built in somebody's garden. When asking about what was going in there, the builder told me it would just be a couple of small power tools, but on further investigation the customer wants to use an...
    • robsparx
    • Thread
    • aus current domestic environment installing maximum supply welder
    • Replies: 6
    • Forum: Australia
  17. sparks1234

    Maximum circuit length

    Looked in the onsite guide today as we thought we may be close to the limit of a ringmain circuit length, the guide gives out a maximum length of just over a hundred mtrs for a 2-5 / 2-5 / 1-5 ring main. Now as we are looking at a trunking system which is to be wired in singles but all at 2-5mm...

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