measured | Page 3

measured

Recent contents View information Top users
  1. D

    Measured and calculated Zs

    Can anyone tell me how I could have from my dead test results for a lighting circuit obtained a value of R1+R2 which is greater than my live test Measured earth fault loop impedance for the same circuit. According to the equation Zs= Ze +( R1+R2) that should be impossible. Any help...
  2. S

    Reliability of measured Ze for Zs calculations

    Afternoon all. Re-doing my calculations for a hot tub supply after client upgraded the specs. Details are: Hot tub rated at 16A. Supplier advises to use Type C breaker to handle inrush when pump starts. 26m from CU to Hot tub via rotary isolator switch. I was proposing to use a 20A Type C...
  3. C

    Zs - Calculated and Measured Differences

    Not too sure what to read into this!! New installl in my garage and doing initial testing Socket Circuit ( radial ) R1 + R2 = 0.03 ohms using link method in CU R1 + R2 = 0.03 ohms measured Line and CPC individually ( done this just to double check ) R1 + R2 = 0.07 ohms - of SWA from CU in...
  4. V

    Testing limitations

    I cant do Ze because I can not turn off the power,it has to stay running 24/7, what do I do???
  5. brucelee

    shower question

    hi everyone i have a question on a shower circuit the ccu is a crabtree sb6000 type,tn-c-s system,100a main switch split load 6 way 4 protected by 80a 30mA rcd with shower 40a,cooker 32a not used,32a sockets for all house,16a old immersion circuit now used to supply 3 pir 500w...
  6. S

    Old problem with circuit length calcs

    Sorry to bring up an old post but im confused. I have carried out tests on a kitchen ring final wired in 2.5mm/1.5mm T&E, results as follows: r1=0.36 rn=0.34 r2=0.59 I then joined leg 1 of line conductor to leg 2 of cpc and leg 2 of line conductor to leg 1 of cpc and measured the R1+R2 at...
  7. T

    Measured 24v at Pendant ??

    A friend of a friend called me up last thing today, he'd brought new switches for his bedrooms and attempted to connect them up him self !!!.. He made me laugh when he rang, he was worrying like it was the end of the world. Ha ha.. He didnt know what he was buying as he'd brought intermediates...
  8. 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?

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top