voltages

voltages

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  1. T

    Earthing, Metals and different voltages during faults

    forum erroneous post removed
  2. M

    Megger 1533 showing phantom voltages on Ir and Impedance

    Hi! Some help would be appreciated! I've just moved into new house, wanting to check insulation resestance etc as getting some nuisance tripping, this bits not important. Got my megger out, which has worked perfectly up until now, it doesnt have a test cert, but I'm not fully qualified and...
  3. TonyandCheeny

    Testing voltages on light switches

    Hello guys. I have a question as being in Africa for 15 years, I used to use a mustimeter to check voltages at the light switches as they got neutral and lives inside the switches, however when I moved to England I found out that there is no neutral at the switch as the neutral goes to the bulb...
  4. D

    How can you combine 6 different ac voltages?

    I am building an alternator of my own. I have found that by putting 6 points around my magnets crates an insanely larger amount of electricity with very little force. I am producing around 20-25V out of each point totaling around 125-135V total ran off a tiny little airplane motor and 2 1"...
  5. Sparkgap

    Mains lamps at low voltages

    We recently had a single phase HV failure at our local substation with the result that the phase feeding our house dropped to about 88V. Interestingly, when I checked around the house a number of lights still worked: 60W filament GLS (red glow), some 7W LED lamps (nothing), other 7W LED lamps...
  6. R

    Can a difference in phase voltages cause a motor to fail?

    Here is the background: A new Grundfos 3 phase sump pump was installed in a bore hole to pump groundwater to a holding tank. After 6 weeks the motor failed, the installer measured the voltage of the 3 phases which at the time were P1-237v P2-250v P3-233v and suggested this was the likely cause...
  7. H

    UK Voltages Comparable

    Looking to purchase some commercial induction catering equipment which is rated at 380V and other items at 220V all at 50Hz will these operate on UK single & three phase circuits safely, correctly and without overheating issues, or will I have to introduce a step down transformer on the supply...
  8. H

    UK UK Voltages compatibility

    Looking to purchase some commercial induction catering equipment which is rated at 380V and other items at 220V all at 50Hz will these operate on UK single & three phase circuits safely, correctly and without overheating issues, or will I have to introduce a step down transformer on the supply...
  9. M

    Unexpected voltages on downlight circuit

    Hi all Was checking out some downlights at property. Only had half hour there and due back next week to delve into it further. Upon first one checked the first thing I noticed was just how hot this fitting was I'm not sure if the following readings would have any bearing on this. With switch on...
  10. B

    Light fixture wiring. (confused by voltages at junction box wires)

    I've got two black wires coming out of a junction box that I want to wire a light fixture to. One black wire has white tape on it. It always has voltage to ground so I think I can assume that's my 'L' or 'hot'. I've tried connecting these two wires to my light fixture wires (and the ground to...
  11. gazdkw82

    Odd voltages

    Sorted a shorting fault at a pendant earlier this evening. Whilst i was there they asked if I could look at the wall lights that have never worked since they moved in 2 years ago. 2 wall lights. Getting 244v line to earth, 0v neutral to cpc but 74v line to neutral. The 74v line to neutral is...
  12. S

    Shaver sockets 2 voltages

    why do bathroom shaver sockets have 110 and 240 volts?
  13. A

    Multicore cable voltages

    Wiring RF thermostat receivers to valiant boilers... We have been using standard 0.75mm 5 Core flex, from the receiver to the boiler (reference method B). Obviously the flex is carrying L-N-E at 230v and also two switch wires ‘boiler on’ ‘boiler off’ at 24v. However someone has made a comment...
  14. D

    Unexpected voltages?

    Hello from Spain! I am after some help and advice. Whilst checking my supply ( which is TT and the whole installation is protected by a 30ma RCD) I have found the following With the earth connected to the rod L to N 240v L to E 345v N to E 148v If I disconnect the earth rod, at the consumer...
  15. G

    Sensitivity to high voltages

    The electronics within our machines are manufactured to be tolerant of 220V +/-10%. many components have a max 250V allowance. Now we all know that although our domestic supplies are supposed to be 230V they can vary widely, I personally have measured 257V on one supply. What in your opinion...
  16. S

    Operating Voltages?

    Hi there My enquiry is to do with lamp flex and voltage parameters. I want to buy flex from China, vintage look, multi coloured casing etc, and it states.. 1..Certified SAA, VDE, UL 2..operating voltage 100-300v If I am going to sell table lamp products in the UK, where I live, will I need...
  17. UKMeterman

    HV phase lost, strange voltages on LV side

    Hi, Storme Katie dislodged one of the HV jumpers on the DNO 11 KV network, so the local 11KV 415 transformer was single phasing. I expected to get 240, or 120V but there were some people getting 150V and I got about 70 volts and it was indepenent of load. I am trying to work out why not 120V? Thanks
  18. Lee Gold

    Star and delta phase voltages

    I came across a question today in my paper asking me to draw out star connection and a delta connection and draw out phase voltages on star from phase to phase and write in the voltage and I don't understand it at all can somebody help please. Star carrying 240/400v delta 400v Sorry I'm not...
  19. M

    Led snubber

    Having read the forums about these, there appears to be several answers as to what and where. Is there a definative answer as to what these are, where you put them and where to purchases them ?? I dont want to go into a store and be looked at like i am speaking in tounges ! :6:
  20. A

    Wiring 120Vac and 480Vac 3 phase

    I am wiring a actuator that has 480V power and 120v control wiring. I was wondering if I could wire them through the same conduit.

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