measure

  1. D

    How to measure battery bank energy?

    Does monitor on a bank measure true watt hours if the batts have different state of charge?
  2. J

    Metrel Earth Electrode test - current injector clamp and measure clamp - can i use on domestics TTs?

    Hi Have to say Meterel not been very helpful here. Has anyone any experience of using the current clamps on domestics where you cannot get your current and voltage stakes in the ground near the property? I have a project where it is TNCS, in very rural area prone to loss of Neutral. I have...
  3. S

    How to measure inductance of transformer

    Hello How to measure inductance of transformer
  4. D

    Current measure with multimeter (help)

    Hello everyone, friends. In cases where I do not have a clamp meter, I want to measure the current drawn by the phases of a 3-phase motor with my multimeter. I left a picture below as an example. I connected my red probe to 10A., my black probe to Com. After turning the multimeter to 10A; For...
  5. L

    UK Where to measure Ze, opinions welcome!

    Where do people record the Ze & PFC of a 3 phase installation, if there is say 10m of 25mm tails between the 4 pole isolator (next to the meter) and the 3 phase distribution board, therefore some (though negligible) resistance? Do you tend to test at the origin, and record that result, or do...
  6. T

    How to measure rail-to-earth resistance and rail-to-earth potentials

    Dear forum members, Would you give please a practical tips how to measure and what measurement equipment to use (with some examples if possible) to measure the rail-to-earth (tunnel) resistance and rail-to-earth (tunnel) potentials? The measurements needed to be done in the tunnel (cast iron...
  7. B

    Can’t measure R1+R2, can I calculate it instead?

    Hi forum, A question about R1+R2 testing. I’m testing a lighting circuit. It’s an old circuit with old colours. In the control panel feeding the circuit there is no earth cable feeding the lighting circuit, only an earth cable bonding the control panel to the strands of the armoured cable...
  8. V

    best way to measure shading on a roof

    hi we cannot get hold of a pv shading tool / pv horizon meter anywhere. How do others measure shading on a roof please?
  9. G

    Solar Spare solar energy, how to measure?

    We have solar PV panels (1.5kw) and I'm curious about fitting an immersion diverter to use any spare solar energy for heating water rather than sending it back to the grid. Before we do that, I'd like to have an idea if we have sufficient spare solar power for this purpose, if not then it's...
  10. B

    How to measure impedance/resistance of an AC circuit

    Hi, I’m fairly new to all things electrical but I’ve recently taken more of an interest after having a CU fitted to my shed. Is it possible to measure the impedance or resistance of an AC circuit with a basic multimeter? I tried to do this by connected each electrode over the positive and...
  11. spud1

    Can I measure the level DC 'leakage' current piggy backing on an AC supply?

    Hi ! Much talk of the use of type A, type B and Type F RCDs recently. As we know all are specified at varying levels to ignore the blinding effects of transient DC currents, that are being superimposed on our AC circuits by modern technology. But is there a means to measure the level of this...
  12. A

    Can you measure the grounding on an UPS output?

    Just installed an UPS and I have a multi-meter that I use to check if a wall outlet is grounded Just tried it on one of the UPS outlets (2 prong) by placing the multi-meter red probe to the metal and the black one to the right side of the outlet and it reads 0 Is this normal? Same measurement...
  13. R

    Which Tape Measure

    Can anyone recommend a decent tape measure?
  14. J

    If you drive a metal rod can you use it as a reference to measure voltage

    If I was to drive a metal rod in the ground and measure between live and the rod will I get a reading? ( I’m still studying)
  15. H

    Clamp meter that will measure milli amps

    Afternoon all. I’m looking to invest in a clamp meter but want want that will measure milli amps (nuisance tripping etc). The megger 305 seems the best about; is there any others out there? TIA.
  16. spud1

    Measure or calculate your Zs?

    Hi again! Which value is best to record in a certificate or report, a max measured or a calculated Zs? I know Sparkies who do it both ways, but personally I take measured values at all the points of utilization to find the highest, then I calculate Ze+(my highest R1+R2) for the circuit and...
  17. naylorpd

    Digital tape measure

    I'm toying with a digital distance measure for my Christmas pressie for me...had one a few years ago but I never trusted it and always ended up checking with a steel tape. So...do you use a digital tape measure, and to what extent do you trust it? Over how long (or short) a distance do you...
  18. O

    Laser measure devices - suggestions please

    Fed up with using a tape measure and in the market for a laser device Any suggestions? Recommendations from personal experience? Thanks
  19. J

    Why do Megger MT1700 Teaters Measure IR to 999 Megohms

    I have got a new Mt1720 Megger tester and it measures to 999 Megohms. the old one my boss loaned out to me and my assesment testers only go up to 299 Megohms. Why do they go so high now?
  20. R

    How do you measure 3 Phase Supply confirming it is correct as in 400V between phases etc.

    I have my AM2 exam and the question I have is how would you confirm supply polarity? Would you do the following tests:- L1-L2 L1-L3 L2-L3 L1-N L2 - N L3-N L1-E L2- E L3-E doing this you should expect 400V reading? Finally, test Neutral to Earth and expect to be 0 volts. Would the main...
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