measuring | Page 2

measuring

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  1. J

    Measuring Zs with RCBO

    Hi everyone, I've read that when carrying out earth fault loop impedance test we have to disconnect the functional earth of the RCBO (in case there's one) from the earth bar to avoid misleading result. Is that correct and is there anything else we have to disconnect? I know about carrying out...
  2. J

    Zs measuring - ring

    Hi all, I know it's easier just to add R1 + R2 to Ze to get Zs, but I was wondering if I want to measure Zs on a ring circuit which one will be considered the furthest point - the center of the ring or the end of the circuit where one leg's disconnected at the board?
  3. T

    240 volt outside light measuring 180 volts.

    Hi all. Looking for advice here. The mother in law had her house extended and totally rewired by someone that said to her he was a qualified sparks. I've been up the loft and found crimped wires and not even clipped down and a whole host of lovely terminal block connections. One set of these has...
  4. D

    AC Clamp Meter measuring DC

    Hi all, Great forum! Have read posts from time to time but only registering now. I have a quick question about my AC Clamp Meter. I wanted to measure the current my pool Chlorinator cell was drawing from the power unit - its rated at 7V DC / 30 A. Seeing as I only had the AC clamp meter I gave...
  5. T

    KWh meter for measuring generated electricity?

    First, some background. I live in Indonesia and am not a licensed electrician. That said, I do have some basic knowledge. Enough to know that what I am doing is not up to code. I am going to install a 100 Wp system with a plug-and-play grid-tie inverter plugged into an outlet. I repeat, yes, I...
  6. J

    Measuring Motor Resistance

    Hi, We have a 1 tonne Paint mixing machine, what sort of test could I put onto the motor to measure the resistance of the stirrer as the product thickens up. At the moment we have to stop and open the machine to test the thickness. Would be great to just mix and have a gauge highlight when...
  7. S

    Measuring Zdb

    Evening chaps, thought I'd post this here to help potentially successful trainees in the future as I'm 99% sure this isn't covered in the courses (certainly not in mine anyway). Measuring Ze and Zs is straight forward, and we all have in our heads Zs = Ze + (R1+R2) BUT what about measuring...
  8. N6rul

    Wanted Lux measuring instrument

    Hi, I am looking for lux measuring instruments compliant to bs5266, pls email me on [email protected] thanks
  9. I

    Measuring residual current. How do I know what RCD to fit?

    Hi, I have been tasked with rewiring most of the machines in a factory. Due to the age of the equipment and usage I believe residual current protection is a good idea. This presents an issue with how they want them wired. Currently we have cables hanging from the ceiling at multiple points of...
  10. K

    Measuring 170v?

    Hello all. Ive been called out to a fault on some electrical signage and lighting in a bus shelter. Everything is off which is normally simple to fix and have done this hundreds of times before. The problem I am getting is that I can only measure 170 from the cut out in the lamppost feeding...
  11. W

    Which Voltage Indictor

    I've been using a Martindale neon indicator for about 10 years and it needed replacing. Purchased the Fluke T100 only to find it trips 30mA RCD's. My bad. What would be a good replacement for the Martindale or should I just by another one. I do find the the retractable probes sleeves a bit of...
  12. L

    Measuring ZE - Am I getting too high a measurement? - what is 'normal range'?

    Hi all, I've just put in a new 32amp ring main in a domestic Crabtree Starbreaker box , I've tested for R1 + R2 at all of the 12 sockets in the ring (a loft conversion) and I'm getting 0.36 as the highest reading. When I test for ZE I'm getting 1.28 which when I add this to R1 + R2 I'm getting...
  13. M

    Voltage derived from differnet transformer

    When i measure the voltage between L1 of 230V transformer and L1 of 450V transformer i can measure around 180V. Can i use this voltage to light up a 220V lamp? Actually i tried it but it doesnt work and dont know why. Have tried also to any other phases but no way that it lights up..Thanks for...
  14. S

    eicr form filling

    hi everyone been reading this forum for a year now and this is my first question i just hope i am doing this right. on TT earthing we have one box for RA and one for ZE, what box do we use.
  15. P

    Measuring useage

    Hi All, Now that I have my spiffy new PV system and it's merrily telling me how much it is generating each day I find I want to know what I am using on the consumer side more than ever. I have always wanted to do this since I decided to get PV and have been reading anything I can find on the...
  16. P

    method for measuring the voltage drop

    hi, if we need to measure the voltage drop from a main cu to a sub cu in a outbuilding, what method can be used to verify the voltage drop
  17. ringer

    Measuring R1+R2 but unable to measure Zs

    Am testing a lot of tubular heater circuits in a church. All circuits supplied with MICC, which runs to SFUs then via short length of heat-resistant flex to the tubular heaters. Have tested approx 40 SFUs/heaters so far without problem - R1+R2 (dead), IR (dead), then Zs (live) on each one...
  18. S

    Measuring Ze value??

    Hi can anyone give me a procedure to measure the Ze value of a house? I am currently studying to become an electrician and I am very much a rookie so please be patient with the baby step questions :-)
  19. K

    Measuring resistance of dimplex elements?

    Is it possible to measure the resistance of the elements inside a dimplex storage heater without removing the bricks, by measuring the resistance at each connector block that the elements connect into? And what readings would be expected?
  20. C

    measuring equipment

    Hi I need to invest in an electronic measuring device to measure roofs etc from the ground. Any recomendations for a good lazer tape or similar? Many thanks

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