voltage

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  1. KelvinGaliny

    Why live to ground voltage is only 0V (in a 220V AC power outlet, there is also electric shock)?

    Hello, my name is Kelvin. I'm a trainee hydraulic engineer in Indonesia. I apologize if this question has been answered before / if this question is too basic. So we have a problem with electric shock coming from an electric panel. This panel runs on 220V AC supply & is used to run an inverter...
  3. TonyandCheeny

    Strange voltage on earth wire

    Hi, I've got a light with a ceiling rose in the kitchen. While rectifying some faults in the house I came across to the light and measure Neutral to live: 240 volts (which is fine ofc) however when measuring earth to live I'm getting 150 volts. I have checked for any touched wires with my Fluke...
  4. Sparkgap

    Super low mains voltage, what works?

    Some months ago the transformer feeding my road had a HV phase loss with the result that my house was only getting about 85V. It was interesting seeing what stuff worked and what didn't: for example, 60W bulbs glowed, fluorescent lights didn't(!), some LED lamps worked, others didn't, and my DAB...
  5. J

    Voltage drop question

    I have a run of conduit 172ft from a 12x12 box which branches out to parking equipment with runs about 50ft from the box. My voltage drop calc requires me to run #10s to the 12x12 box. My question is from that box can I size down to the respected size of wire my machines need (#14awg) to branch...
  6. stopconsuming

    Domestic How can there be voltage on water pipes?

    Hi everyone, I need some help with an electrical issue I'm experiencing. I recently created a new circuit for an electric oven at my friend's place, and when I returned home, my friend called to say that the two water pipes connected to the boiler were smoking. When I arrived, I first measured...
  7. J

    What is the incoming Voltage Before and After the Service Fuse?

    I know that after the Henley Block which houses the Service Mains fuse, the Voltage is 230v If we was to remove the fuse and Measure the incoming Live wire, would the Voltage still be 230v?
  8. M

    Voltage drop sin phi

    Hi chaps, Been working though the electrical design guide and I'm stumped on reactive power. volt drop and the equations are easy enough but I have no idea where sin phi has come from or how they have calculated it at 0.6. Any help would be greatly appreciated
  9. E

    3ph solar inverter fault code - bus voltage unbalanced

    So my friend's inverter is not working and fault code says - bus voltage unbalanced. Has anyone come across with something like that? Inverter is 10 years old and install company doesn't exist anymore.
  10. J

    Trainee voltage experiment - Will it remain the same or change?

    If we have a single 100V Live coming in from the AC Transformer, at any point we measure its 100V If however we introduce loops, does this have any effect on voltage? What would be the voltage reading at the following points on the image Purple Pink Green Im wondering does it have any...
  11. T

    Insulated Terminal Voltage Ratings

    Hi, We are working on a Solar installation in the UK and have been asked to replace the string cable terminations, 6mm² yellow insulated ring terminals that are bolted to a common busbar. The reason stated is that the insulated terminals are not rated for the string voltages, 1000Vdc STC. Having...
  12. U

    Using Induced voltage

    don’t worry I’m not going to do this .. If I have a wire that is powering something like a house and lay or wrap another wire around it the wire laid beside it or wrapped around will show a voltage if connected to a test meter . If I did it to the positive wire prior to the meter in a house I...
  13. P

    Is Voltage the Resonance of Electrons?

    Is Voltage the Resonance of Electrons? (Either in AC or DC-please describe each one seperately if needed)
  14. T

    Voltage N to CPC causing Fan timer to continuously Run

    Hi All, Bit of a tricky number. I have recently installed lights / fans /toothbrush chargers and shaver sockets to a bathroom and En-suite. The house had been rewired a few weeks before(not by me). I tied into the existing lighting circuit and everything works fine apart from both extract fans...
  15. K

    Inverter generator - manual transfer switch - voltage issues

    Hi Sorry to bring this one up again but have read numerous posts and answers and not got an answer specific to my situation. I have a Loncin LC3500i inverter generator which my electrician has wired via a transfer switch into a secondary consumer unt which covers the garage and office withing...
  16. B

    Car battery charging, how high should voltage go?

    Hi, I bought a car battery charger and plugged it on my car battery to test it (normal battery not AGM). my battery was probably already fully charged because I drove with my car just before using the charger. So this happened: the voltage on the charger started at around 12v? (not sure...
  17. J

    Selectable Voltage Sensing relay 0-18V AC

    I was wondering if I could get some help on trying to electrically solve this idea I had. I was wondering what the best way would be to set the maximum voltage limit from a variable AC transformer so that it could never exceed a selectable predetermined voltage and if it did, would just force...
  18. S

    Voltage optimizers any good?

    Hi. Are they any good and how do they work? Do they lower the voltage across the board? If so what about appliances that use more than 220v? Thanks Spynage
  19. K

    How does Touch voltage work without RCD protection

    Hi everyone I asked my assessor about touch voltage and he was not keen on explaining properly and gave me a rough answer which made me think probably he was not sure himself or was hiding it. basically my understanding is afcourse that how 30mA RCD works to limit touch voltage to 50V is by...
  20. P

    11kv pole loop fault, over voltage ?

    Hi first post, I'm a pretty well experienced electrician of 15 years now working solely in Agricultural electrical We have a lot of voltage sensitive equipment on our farms which run auto ventilation and alarms ect Today we had a huge bang from the 11kv pole transformer on one of our sites...
  21. S

    USA Aerator voltage questions

    Hi everybody, we are currently renting a aerator system from Culligan and we have been trying to replace it with a unit we purchased that was used, but I have some questions about how to setup due to different pump voltages. The current system consists of the outlets shown below which are both...

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