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volts

The volt (symbol: V) is the derived unit for electric potential, electric potential difference (voltage), and electromotive force. It is named after the Italian physicist Alessandro Volta (1745–1827).

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  1. C

    USA Good volts but low power output

    I'm having a problem with the electric running to my shop. I have electric, but when my compressor or chop saw is running, the lights go extremely dim, and the saw is not running at full speed. The compressor is struggling when it is trying to build up. I've checked the voltage at the circuit...
  2. Jay 1987

    Electrician uses 1,000 volts to his advantage

    https://www.google.co.uk/amp/s/www.thesun.co.uk/news/9628217/electrician-wires-van-1000-volt-shock/amp Now he has copyrighted his electrical design, and is installing for £380. What’s our Thought’s on this ?
  3. W

    Volts drop when 2.5kW (ish) load switched on

    hi This is just a starter because I haven't done any measurements yet (I was a guest there) and what I can do will be restricted as this has never been thought to be a problem by the owner who is a relative, but I'm more concerned than he is by what I've seen. Background: modern hugely...
  4. A

    Transformer to out put 27 volts

    Hi, I have 6 x 4.5 volts led lights. Each has a 3 x 1.5volt AAA battery. Total 27 volts. I want to use a transformer to connect the six lights instead of using batteries. Please advise me on what type of transformer and where to buy it from. Thank you.
  5. S

    Suitable LED bulb for rechargeable battery

    Hi I am trying to make a light fixture with an LED bulb and rechargeable battery so that it can sit on table without any cords. What LED volt light will work with 3.7V 750 mAh battery (see picture) or 4.8V rechargeable battery (see picture) I am only finding LED strips and bulbs that...
  6. Marshall Kidd

    Splitting 3-phase circuits for 3 high draw theater fixtures.

    Hello. I'm new here so my apologies if this post ended up in the wrong forum. I have a basic understanding of phases and voltage and the lot. Today I'm trying to wrap my head around how I might be able to split one 3-phase 240v 50a source to accommodate 3 high draw theater fixtures. Here's...
  7. S

    60 volts on an R2 long lead test?

    Testing today. Zs produced an Err 4 reading on the Fluke MFT, so I got the wander lead out and connected to the MET. No continuity but 60 (ish) volts difference showing on the display. Any ideas?
  8. B

    12 volts out when Engine Start

    hi, I want my car stereo can power when the engine start, not when the panel lights turned-on. in short I want the car stereo power when there is an engine acceleration. with that wiring I can also top other wires for example my dc electric fan. what are your ideas? suggestions?
  9. PLW

    Methods used to start a fluorescent tube

    Hi there, I am currently reading through the different methods used to start a fluorescent tube. I have come across the glow type starter and the thermal starter circuit. In my course book the glow type starter is described as follows "Contained within the starter can are a set of normally...
  10. PLW

    Explain the difference between a transformer and auto-transformer

    Hi there, I understand that a transformer is used to either step up or step down the supply voltage. I know that the basic principle is that if there are more windings in the primary coil than the secondary coil then, the voltage is stepped down and if there a more windings in the secondary coil...
  11. PLW

    How and why does voltage lag current in a purely capacitive AC circuit?

    Hi guys, I have no idea if this makes any sense, but I’ll give it ago with the hope of getting a better understanding. I know that a capacitor is a device used to store electric charge and that it charges and discharges at a rate determined by the frequency (50hz in the UK). As the supply...
  12. PLW

    Step up and Step down transformers

    Hi guys I am currently training to be an electrician and have only been at college about 6 months. So my understanding of things isn't particular great. Anyway I have recently come across transformers and whilst I understand the general idea is to either increase or decrease the voltage for a...
  13. the pict

    Commercial Horse box, well was, now catering trailer

    Where can I get a 12volt psu to power a sink water pump ala caravan, tried all the obvious, caravan, alarms, pc,s, aquariums. and I am at, turn next left for wits end. all because I said 230 Volts which somehow means 24 volts to some. being completed and used this weekend, but apart from the...
  14. B

    hot start problem

    I have an annoying problem with my Chevy Camper. When it is cold the starter turns nicely. When it is hot, the starter turns very very slowly and occasionally it will fire up. otherwise I have to leave it for ten minutes or so. I fitted a new starter and a new heavy duty battery and new...
  15. B

    INDIAN BOY BELIEVES HE IS RESISTANT TO ELECTRIC SHOCK

    This 16 year old boy believes he is resistant to electric shocks even high voltage Its claimed he mends supply problems without a shock and also show people he can put live wires in his mouth. He is nick named electricboy. see I'm a human lightbulb! The teen who survives a shocking...
  16. happyhippydad

    Honest Views On Volt Drop?

    I have just been asked to provide power to a large garage/workshop for a friend. The workshop is approx 55m away from the main CU and there will be a further run of approx 15m for the lights from sub board to end point of lighting circuit. It will be on a 32A MCB in the main CU. measured voltage...
  17. M

    Help With Diodes And Voltage Drop

    hi guys, im having a problem wiring some relays that need to be activated by 2 different signals, i try putting a diode on one of the signal wires so electricity wont flow thru the other signal wire, but now im having a huge voltage drop, and the relay is not activating by the wire that has the...
  18. P

    12volt Garden Lighting Circuit

    Sorry if this a very basic question But under your current electrical regulations are 12volt circuit exempt ? I have a 230volt socket outlet circuit in my garden tested and approved I wish to install garden lighting ..the whole of which is plug and play I plug the transformer into the...
  19. J

    Can I Get A 127 Volt Step Down Transformer?

    Hi there, Not all that knowledgeable on this kind of thing but I purchased four audio-visual appliances made in 1970. All are identical apart from the voltage requirements. One requires 117 volts - the other 3 units require 127 volts Can I get transformers for such voltages? Also what...
  20. Videodoctor

    Dangerous Work Exposed!

    Hi Guys, Have i been to a hum dinger of an installation today! Are we sitting comfortably then i'll begin. An electrician i was talking to in the wholesalers mentioned that he was having trouble tracing a fault where there was 60 volts on the pipework and he was having trouble tracing it.I...
  21. Videodoctor

    Domestic Dangerous Work Exposed.

    Hi Guys, Have i been to a hum dinger of an installation today! Are we sitting comfortably then i'll begin. An electrician i was talking to in the wholesalers mentioned that he was having trouble tracing a fault where there was 60 volts on the pipework and he was having trouble tracing it.I...
  22. S

    String Voltage

    Hi just about to install my first solar system. Been a commercial electrician for 29 years but no PV experience. After pushed away from Micro inverters by advice from people on here I decieded on Solaredge. Have sized my system on the solar edge designer software. Now thats telling me I need a...
  23. Davisonp

    Voltage Drop When Load Is Applied Question

    Hi, I came across a situation recently while investigating a problem where measuring voltage at a set of 4 sockets read 243 Volts with no load, and when a 21 Amp load is applied, the voltage then reads 230 Volts. Is it normal to have such a large voltage drop under load? Or does it imply the...
  24. Dan

    Dewalt Xr Flexvolt

    http://www.cef.co.uk/dewalt-xr-flexvolt Anybody got one of these flexvolt' from dewalt yet? Meant to be super powerful.
  25. 2

    15 volts on lighting circuit with circuit turned off?

    Hi guys, Whilst carrying out an ECR yesterday I was doing an r1r2 test on a lighting circuit (downlights) in a new extension and noticed that I was getting 15v L-N and 15v L-E with the circuit de-energised. To cut a long story short after some investigation, I noticed that the 15v was coming...
  26. C

    Voltage issues

    Hi got a r32gtr and having voltage issues I've tested alternator direct 14.5v tested battery 12.6 battery has been relocated into boot but I do a voltage check engine running 13.2 at batttery if I connect meter at connector in engine bay for battery live and earth to body 13.2 if earth to...
  27. Pete999

    Is this a voltstick?

    TESTED: Stroma Socket & See - Professional Electrician Anyone seen, used or heard of the tester and proving unit advertised in the PE Magazine? Not seen it yet
  28. G

    Change voltage?

    Hi, I have a large cooking machine with 12kw banks of elements that heat a water tank. The machine is wired three phase but is not english, so the elements have a range of 210v to 280v so was wondering if I could some how put them onto our 240v? If I leave as it is our 400v three phase will burn...
  29. M

    Rated current based on 415V but rated voltage 240V?

    Hi all just wondering if someone can clarify something for me. I'm looking at fitting a switch onto a din rail, I can't find exactly what I need so it looks like I'll have to fit a switch disconnector. My question relates to the operating voltage. On the data sheet attached it says rated...
  30. J

    Domestic Live to Neutral voltage issue at socket

    Firstly - apologies if this is in the wrong place but I couldn't seem to post in the DIY area. I have removed a socket cover in order to decorate and replaced it to find it didn't work. This socket is in a bedroom on a separate ring to the main sockets, with just the two bedrooms sockets on it...
  31. B

    Domestic Leisure Battery Losing Voltage

    Hi all, I am posting because I have a problem with my leisure battery. It is losing charge. It is a 230AH 12V lead acid Varta leisure battery, I bought it in December 2015 so it is hardly old. I took it to the French Alps for a month in February, where, admittedly, it got quite cold, and...
  32. E

    380 volt

    A friend of mine has just bought a pizza oven and the rating looks like 380 volt single phase at 4.5kW. Any idea how I can connect this to our current supply ? It's definitely single phase as the thick flew coming out of the unit is only 3 core (live, natural, earth)
  33. E

    Why is there 8 volts across the main switch when the mech n/storage timer is off?

    I have a mechanical timer switch controlling the night storage radiators. My multimeter can read AC volts but not amps. The mechanical timer switch is showing off at the moment, however:- When I put the multimeter across the supply with the consumer unit main switch on it registers about 8...
  34. T

    Voltage for electric strength test

    Hi team, Im currently working on a heating element product and going through the BS EN 60335 regualtions. (not as good as harry potter but a interesting read). The standard test we use on a almost identical product is 1.5kV. This product is 230V 220W Class 1 protable, with basic insulation...
  35. juice

    do you use the multipliers from tab 13 in OSG when calulating volt drop?

    I've recently done a C&G 2396 Electrical Design Course and unfortunately the tutor who taught the course did so for the first time and in my opinion didn't do a good job of teaching the material. I'm now doing my revision for an exam this Thursday and trying to make sure all the formula I use...
  36. T

    Auto voltage control box/regulator unit

    Greetings everyone, I am new to this site so please excuse what might be a dumb question. I have a 1932 Sleeve valve Panhard fitted with a dynastart. The charge is almost nil. I am due to check the dynamo side of things this week but I have a feeling the voltage control box/regulator might...
  37. G

    480 volt water heaters

    Sometimes its impossible explaining why the US uses larger wire sizes lol: http://www.electriciantalk.com/f17/water-heaters-158322/index3/#post2868593
  38. B

    Domestic Experiencing volt-drop within household

    Hi All, I am not a qualified electrician - please be gentle! I had renovation done to my house last October which included a complete refitted kitchen. The new kitchen included a new Neff double oven in which has been working like a charm since last it was installed (including both ovens being...
  39. Michaelwgroves

    Wera 247 Single-Pole voltage Tester screwdriver keeps breaking

    I purchased a Wera Kraftform Kompakt VDE 1 piece screwdriver set which I love. However, the 247 Single-Pole voltage Tester screwdriver keeps breaking. I'm now on my third replacement! My old voltage tester screwdriver I've had for over 25 years which was passed down to me by my father. I only...
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