voltage

  1. M

    USB Voltage out of fused box

    I'm looking to run an led light directly from mains power. I currently have a socket with phone charger plugged in to power it. But it looks ugly and sticks out. I'd like to chop the plug off and wire it directly into a fused box. Any advice on what I'd need for this? 12v fused socket? Or do I...
  2. W

    Solar irradiance goes up voltage goes down...

    Newbie here, my company has recently taken over a solar site and I have been tasked with fixing the inverter which is a Schneider Zantrex GT500. Support from Schneider has been poor. Anyway, after troubleshooting the AC breaker failure, determined that the under voltage coil was bad so I sent it...
  3. J

    Trailing edge versus low voltage

    I'm an electrician but know jack about LED lighting. Buying my first home and thought that this is a could time to learn, but seems a little more complex than I first thought. So the plan was just to use 230v dimmable LEDs (Luceco EFTE45BS30) with trailing edge dimmers. But then the more high...
  4. J

    Voltage Drop Design Current?

    When calculating voltage drop and using the formula mV/A/m x Design Current x length / 1000 = v Do I use the design current value after rating factors have been applied? Thanks again for any help.
  5. R

    Mains or Low voltage garden lighting?

    Hi I am currently remodelling my garden and going to be installing some decking lights, spike lights and up/down lights on my fence. I just wondered what were peoples opinions on using either 12v or mains powered lights Was looking at switching it using the quinetic wireless switch Could...
  6. J

    Voltage drop.

    Can someone clear up a few points for me please. With voltage drop when the voltage is decreased by a % will the current increase to make up for the loss in voltage to give us the same output? And the more current we draw the greater the volt drop? Thank you
  7. D

    E39 530i touring - Nav fuse stray voltage on earth side - battery drain

    I have recently traced what I think is probably causing my battery drain to fuse 56 in the boot of my touring which is one of the navigation fuses. I thought could just pull the fuse to stop the drain as I never use the sat nav anyway but its had some other consequences. When I pull the fuse...
  8. J

    Zs values and 50v

    Hi all I’m doing some work on my NVQ and came across this on the internet. Can someone explain this picture to me and if it is correct.
  9. tim@fuseboxwal

    Voltage drop under load

    Hi, has anyone encountered a similar fault... TN-C-S supply with old wylex fusebox. Last night, customer experienced total power loss whilst in the shower (electric), nothing tripped and no fuses blown. Customer pulled out fuses to check them and then replaced them all but could only get some...
  10. R

    High voltage

    Called out to a problem in a remote rural property, TNCS 100a single phase supply, overhead lines. Testing after sorting the issue my MFT flashed up a voltage of 265v L-N . Thinking the MFT was playing up I re-tested with a multi meter and got the same result. UKPN called and attended later in...
  11. D

    air conditioner high-low voltage error

    Hello friends. My air conditioner gives E6 error. It gives High / Low voltage error in the user manual. But when I measure the incoming energy, it's 220V. reading. I am uploading a few photos below. There is no energy in cable number 5 in the first picture. Does it have to be? The air...
  12. L

    There is a one circuit (one voltage source), two phases and

    Hello Electricians, This is my first post and I'm glad to be one of this forum member. However, to clarify my question. I've a "Skin Effect Heating System", fed by 1240 V. The circuit is quit simple, Phase U, Neutral in the middle and Phase V. Phase U and Neutral feeding the heating cable#1...
  13. J

    Voltage on ungrounded PC case, is it normal?

    Hello So my ungrounded PC case have some potential/voltage on it. Of course when i ground the case there's no voltage reading. But my question is -is it normal for an ungrounded PC case to have voltage? I mean PC power supply, should not pass 12V on the case, it should be isolated, right? No...

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