• IMPORTANT: Please note that nobody on this forum should be seeking from or providing advice to those who are not competent and / or trained and qualified in their field (local laws permitting). There is a discussion thread on this global industry-wide matter HERE. This also has more information about the warning with regards to sharing electrical advice in some countries. By using this forum you do so in agreement to this.


  1. A

    Induced voltage.

    Hi Just replaced a bathroom extractor fan. I didn't alter any wiring. Both old & new have live & switched live. Trouble is, once activated, the fan won't turn off. Vent axia say there's an induced voltage. Not enough to switch fan but enough to keep it running. Sure enough, there seems to be...
  2. D

    Voltage and Continuity Tester Recommendations

    Hi all, Firstly I am new to the forum, so will start by saying hi. I work as an electricians mate, and am joining the forum to gain experience. I am looking to purchase a decent voltage and continuity tester that complies with GS38. The two I have considered so far are the Kewtech KT1780 and...
  3. T

    Induced voltage on neutral wire

    Hi everyone, When checking my consumer unit voltages with the full board off, I stumbled across something head scratching. Measuring the feed from the DNO, L-N I read 242.3 V. Measuring L-E I measured 242.3 V and N-E I measured a steady 30 mV. When measuring the live side of the main of the...
  4. J

    Voltage Optimiser Inspection

    Hi i've been asked to look into an existing voltage optimiser unit, and provide feedback on it whether or not it needs to be replaced. Is there anything i should particularly look out for? Customer also wants the info on size and type i assume this info will be on the VO?
  5. H

    Voltage drop help please

    all currently working towards my 2391 c&g I&T . I know how to calculate v.d. but the mock test I found online seems a bit out of date or I'm potentially doing something wrong. Here comes de Q. Voltage drop of a single-phase distribution circuit supplying a power distribution board in a remote...
  6. R

    Current flow in neutral but no voltage ?

    Having a challenge understanding the concept behind why when you measure across line and neutral (live circuit) using voltage indicators we have voltage reading of 230V single phase. If there is current flow in the neutral why is it termed as 0V ? On that basis, second question - If I tested...
  7. N

    Extremely low voltage on 120v line

    Extremely low voltage on 120v line Hi, I’m not an electrician but my home has 20 amp breaker that has only one outdoor outlet on it with a GFCI. I had a low voltage lighting transformer as the only thing plugged into this outlet and I noticed that the lights were off and not coming on. I...
  8. Miguel Esteban-Perez

    Straight connections for Medium Voltage.

    Good Afternoon everyone Do you know any UK based company which sells straight connections between Medium voltage transformers ( 3500 and 630 kvas) for 240 mm2 cable with a normal voltage of 24 KV (Um). If so , please PM me Many thanks in advantage. Regards
  9. X

    UK DC/DC Voltage Conversion

    Hi Guys, Looking for a bit of advice for my kids power wheel car. I have a 24v to 12v converter which I need to use for the steering motor as its still 12v. Currently the controller has 2 wires which connect to the steering motor, the polarity of the wires switches to turn either left of...
  10. D

    Advice re voltage converter!

    Afternoon all! I was wondering if there were any electricians here who could share some knowledge please 🙏🏼. I have a Ninja dual zone air fryer that I want to take abroad. The country I’m taking it to is running on 110V, whereas the air fryer is 2470W. Would a voltage converter 110V to 220V-...
  11. S

    Cheap Voltage and continuity tester?

    Hey guys I am still studying in college. I just need one to play around with. As I will be making my own boards at home. Can anyone recommend me one to use ? So I can start practicing how to do testing. Thanks
  12. R

    Determination of Wire Voltage Rating

    I am curious about voltage ratings on wire. I'm interested in 10-4 for a 25-foot cord that will be carrying 25 Amps at 240 volts. There are two voltage ratings for this wire on Amazon, 300 and 600. Would it be prudent to choose the 600-volt wire since the peak voltage of 240 is 339 volts? Or is...
  13. D

    Voltage sensor on Charger

    What does the voltage sensor do for our car charging point? protect from surge or dropping power?
  14. T

    Metal ceiling grid voltage

    100 volts on a metal ceiling grid when measuring from the Met to the ceiling grid Only when lighting circuit (led panels ) is on it goes away if the panels are disconnected from the drivers and left on Each panel has 25 volts from met to screws on the back they are class 2!! So the voltage...
  15. K

    voltage reading on the output AND input of the solar panel battery controller?

    any idea why do I get the same voltage reading on the output AND input of the solar panel battery controller?
  16. I

    High incoming supply voltage EV charger shutting down

    Hello, I have a EV charger that is reporting over voltage and is unable to charge. the charger will operate up to 253V The solar inverter reports voltages below 253V and when the solar is shutdown and isolated the incoming supply reports voltages in excess 248V consistently, peaking at 256V...
  17. L

    Car radio battery wire zero voltage ! but original car radio is working when connected. Why?!

    Hi everyone I am new in this forum and this is my first thread. Car model: Toyota echo 2004 sedan. I used a multimeter to test the car radio battery wire ( blue/yellow) when it was disconnected from the car radio, its reading was 0v. ( as shown in photo 1 ) before and after ignition, isn't it...
  18. 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...
  19. 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...
  20. 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...
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