voltage | Page 3

voltage

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  1. 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
  2. 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.
  3. T

    Induced voltage on twin and earth cable

    Why would I be getting 94v between cpc of twin and earth terminal at DB? Connected into rcbo with the other end 3 cores separated, nothing connected.
  4. J

    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...
  5. 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...
  6. R

    Low voltage light mystery

    I have undercabinet lights that are low voltage. They work xenon pucks just fine. I want to convert to low voltage LEDS. Supposedly these are 12V DC but when I hook 12V DC LED pucks up, they don't work. There is a switch to turn these on that is 120 volts. Somewhere buried behind the wall...
  7. F

    An unusual 3 wire cable voltage

    A 3 wire cable. Black, red, and white only. No ground. What does it mean when, black to white 0v, black to red 120v, red to white 120v? Thanks, Flatwall.
  8. 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...
  9. 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)
  10. 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...
  11. 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...
  12. 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...
  13. M

    voltage tester show sequence of lights.

    After some advice please, I`m gas safe registered and have to do safe isolation to TB118. It`s a new build site and the fast blow fuses were blowing on the boiler; the spark said it was a problem with the boiler. Put a temp on the boiler and it works. On doing a dead test on earth to live on the...
  14. Shahriar

    Outside Wiring Voltage Tolerance

    Hi Friends, I bought a house and trying to add lamps to the outside. There are cables wires all around my stucco walls and the end of them just lie close to a plug. I was going to add a plug head and simply put them into the plug and also bought 8 6W lamps 110V that will be added. I was...
  15. R

    Power Panel Changes Voltage with Branch Circuits

    I have a Single Phase Power box for a townhouse. When I read voltage across the Hot legs (A) and (B) to ground I get 123 volts with the main breaker turned off. With all the circuit breakers turned off and powering up the main breaker to the panel I still have 123 volts across both (A) and (B)...
  16. I

    Rio and BHP specs for unsupported cable allowance and Voltage drop?

    Hi senior members of the forum, I need advice on couple of questions about Rio and BHP specs for electrical installation purposes. What is the minimum allowance for unsupported cable coming out of cable ladder. This is for install of a genset trailer to load. The cable will be going through...
  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. P

    voltage drop running 50 amps 350 feet from service pole.

    hello. i need to run power to a cabin that is 350 feet from the service pole in our driveway. the problem is voltage drop. the service pole is 150 feet from the transformer so total run is 500 feet. is it possible for a diy'er to purchase a small transformer that would bring the voltage up? (i...
  19. 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
  20. N

    Low voltage from a 120 v breaker box, sometimes

    I'm taking a look at the 120v wiring in an old travel trailer that I recently bought, and plan to live in full time soon. It has some quirks that I will explain below, but first here's a pic and diagram of what's going on: Here's the breaker box as it sits now And of course, a diagram to...

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