impedance

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  1. E

    Maximum earth loop impedance

    Table 41.3 gives the maximum earth loop impedance on a type B 32a breaker to 60898 as 1.44 ohms, the testing schedule on the domestic cert asks maximum permissble loop impedance, in the test and inspect notes I seem to remember that you are required to write the full 1.44 but I'm sure that you...
  2. D

    Circuit Impedance

    Taking over a building and starting to get PIR's for handover. They are NICEIC styley and under Circuit Impedence they have three columns for Ring and two for 'All Circuits'. The tester has filled in all columns for every cct but they don't make much sense, eg, 4mm line and cpc, R1=0.39...
  3. D

    Help Please - max earth fault Loop Impedance value table needed urgently

    Hi everyone Would be really grateful for your help on this. I have my 1st NICEIC assessment on Monday (am bricking it) - anyhow I only have an old table & I need one like you get on the back of the proper NICEIC pads - the most up to date table. Has anyone got one they could send me so...
    • daz24
    • Thread
    • aus earth earth fault loop impedance fault help help please impedance loop loop impedance max needed niceic please table value
    • Replies: 7
    • Forum: Australia
  4. E

    Measured Loop impedance

    On another issue how do test the loop impedance at a fixed appliance or a light, to fulfill the measured loop impedance column requirement on the schedule of tests. will the calc R1 + R2 suffice?
    • EddieB
    • Thread
    • aus impedance loop loop impedance measured
    • Replies: 7
    • Forum: Australia
  5. E

    Impedance readings on a ring

    Testing a domestic ring main recently R1 end to end was .4 Rn was .4 the cpc which was probably 1mm (oldish cables 1975ish) read .2. possible reasons for this?? On another issue how do test the loop impedance at a fixed appliance or a light, to fulfill the measured loop impedance column...
    • EddieB
    • Thread
    • aus impedance readings ring
    • Replies: 7
    • Forum: Australia
  6. L

    Testing

    When using a meter to carry out earth loop impedance measurement on final circuits by disconnecting the earth conductor. Is it neccessary to check the line to neutral impedance, this should be carried out with all earths connected.
  7. tuckermot

    RCD,Rcbo tripping on earth loop impedance test

    Hi every one I have a robin 1620 multifunction meter and i am commencing my 2391 in march.My meter does not have a D,lock so when doing earth fault loop testing on circuits protected with rcds and rcbos the test current some time trips the breaker before the meter can get a reading has any one...
  8. S

    Minimum impedance protection & voltage balance protection

    What are minimum impedance protection & voltage balance protection for Sync. Genarators (turbo/hydro)? Please explain
    • speedtronic
    • Thread
    • aus balance impedance minimum protection system voltage volts
    • Replies: 1
    • Forum: Australia
  9. W

    Earth Loop Impedance Table 17th Edition

    Hi Guys, Here is a handy 17th Edition Loop Impedance Table. This table gives you a direct comparison with your Zs tests results and is calculated @ the 0.8 Rule of Thumb figure. Enjoy! :) Warren
  10. D

    Do you need to do continuity tests on minor work

    As Title says. On the Minor Works Certs from the IEE they dont have any boxes for continuty tests. Only insulation tests and Polarity. Do you still have to test for continunity if you are only have to fill in a Minor Works Cert where for a alteration to the Lighting or adding a new socket to...
  11. T

    Testing Voltage drop using circuit impedance

    Ok guys got my head in the 17th edition New bit in Part 6 Inspection and testing (used to part 7 in 16th) 612.14 - "the voltage drop may be evaluated by measuring the circuit impedance" :eek: managed to find the same query on another forum, and lots of views on there about how you would...

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