voltage

voltage

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  1. S

    exceeding voltage drop

    hey guys we have done an EICR on a 2 bedroom bungalow, the supply is a 25mm 4 core 3 phase SWA to the property, it is supplied from 80amp fuse. although it is speculative as the cable is underground we reckon the distance is around 600m :fearscream:. it has being installed around 10 years and no...
  2. C

    How do I get rid of phantom voltage on LED lights feed.

    Have switched a light fitting from incandescent to LEDS. The LEDs continue to glow slightly after switching them off. The fitting is switched 240V live wires and there is a AC 5.1V induced phantom voltage. Little or no AC current. How do I get rid of the phantom voltage. A 4uF 400VAC cap across...
  3. J

    Line voltage wall thermostat wiring.

    Hi all I'm in the process of replacing some 1970s underfloor heating line voltage sauter wall thermostats with new mechanical replacements (of which there seem to be incredibly few in existence - sauter were very unhelpful with suggestions!). Anyway I have found a replacement (T4360B1015 for...
  4. S

    At what voltage should a 1.5V battery be replaced?

    Hello, I used two 1.5v batteries for the remote AC. (AAA/R03P/1.5V) and Its expiration time is 03.2025. The battery is weak, and the air conditioner cannot be turned on. I replaced it with two new batteries and the problem was solved. I measured the voltage of both batteries. They are 1.54...
  5. S

    Do the voltage drop and fluctuation occur?

    Hello, We have a mini split AC Inverter. We need electrical wire for the second mini split AC inverter. Can we get a wire branch from the first AC terminal? Do the voltage drop/sag and fluctuation occur?
  6. R

    UK Inverter over grid voltage fault

    I have a Solis 3.6 KW inverter which works well until it exceeds about 2000W when it shows "over grid voltage" and shuts down. This does not happen if something is switched on in the house which draws a large amount of current such as the immersion heater. I have a voltage meter in the house...
  7. T

    Voltage testers - a basic question

    Hi. As part of safe isolation we use a voltage tester to prove dead; I've been taught that this is done by putting the probes in the following combinations: N+L, N+E, E+L. But why check anything apart from the Live? That's where the voltage is coming from right?
  8. M

    Voltage spike causing strange readings?

    Hi guys, Our client called us out to assess a fault in one of their buildings today, it turns out that certain circuits (those with fixed electronic equipment within them) are now acting as if there is no load and the neutral wires back at the board are now showing 230V to earth. Could a...
  9. D

    Panel voltage differences on same MPP tracker.

    Hi all, This may is a little odd and may take some getting your head around but here goes... I measured around half the load current on two DC strings , even though the AC and DC mains were isolated. There was a voltage difference between two strings . ( around 75vdc between String 6 and the...
  10. G

    which voltage proving unit?

    i need to purchase a voltage proving unit - i have seen Megger MPU690, Martindale PD690, and Socket and See SP400, and Fluke but difficult to compare, will need sometimes to work on 3-phase so 440+volts needed. and with the automatic ramping, is there any way to stop the 400-690v for lower...
  11. 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...
  12. 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...
  13. 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...
  14. 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?
  15. 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...
  16. 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...
  17. 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...
  18. 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
  19. T

    Lost Neutral on 3 Phase system - how do you calculate the effect on line voltage

    I know the effect of a lost neutral (floating neutral) on a 3 phase system, and the theory of why the line voltages can vary. However, I have been attempting to show this by calculating the line voltages of a phase system at given loads on each phase. Lets say:- Red 296 Amps, Yellow 279 Amps...
  20. 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...

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