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induced

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  1. A

    induced voltage

    How do I get rid of them! Testing a job another contractor has been working on. In the main hall of the building there is a switch bank of 7 switches and 7 emergency key switches. Each of the switches are on a separate circuit. When I remove one of the lighting circuits from the rcbo I get 80v...
  2. J

    180volts on CPC

    Hi All, I have just been checking out an installation in a 1970's house in prep for a CU change tomorrow, I noticed in one of the light switches the CPC has 180 volts to earth and 60 volts to live on it, obviously it is not earthed. Anyone any ideas what could cause this? Cheers
  3. G

    led stays light

    hello am new to the site. working in the hotel industry and have change all hallogens lamps to led,but in one of the circuits i have 10 led lamps and when the switch is on the off position 1 of the led lamps stays alight and i am getting 20 volts through the circuit. any ideas is it possible to...
  4. O

    neutral-earth voltage

    guys, head is battered its been a bad day and cant think straight. Replaced a 3kW water heater element and everything went well. Circuit tested out fine so turned everything back on but when the element is pulling im getting L-N 238 L-N 234 N-E 4V!!! This was tested at element but is the same...
  5. D

    Cooker Circuit

    I have been called to do the electrics for a couple who want a induced as well keeping their existing electric oven, here's the details oven 5.2kw induced hob 7.2kw a toal of 12.4kw, after working the design current and diversity out I have 29amps, at the moment it has a 6mm cable with socket...
  6. C

    Induced earth voltage??

    Hi folks, could I have some advice please? I have 12 volts between the (presumably earthed?) metal cooker extractor hood and the earth of a wall socket. This rises to 20 volts when the fan and light are switched on. Yet when I connect a test lamp (no matter whether 3V or 12V or 240V) in parallel...
  7. G

    2 Way Ghost Voltage

    Hey up, was doing some testing today and found 15V at some 5 amp lighting sockets even though they where switched off, after testing the hell out of the circuit I realise now this is induced voltage, I've come across this a few times in the past but only ever 1 or 2 V. The circuit in...
  8. M

    Induced Emf Calculation

    hi all just going the trevor Linsey advanced installtion work level 3 and i'm struggling with a calculation regarding average induced emf..the Question is : The Magnetic flux linking turns 2000 turns of electromagnetic relay changes from 0.6 to 0.4 mWb in 50ms. Calculate the average value of...
  9. F

    Induced Voltage?

    My mother told me her landing energy efficient bulb kept flashing when off. Checked it out and then got a second opinion.The 50v LED on tester lit when across bulb when off. Disconnecting the 3 core + earth and testing it looked like this to be problem. Pulled in a new cable between the two...
  10. M

    Need help with 2 way switching.!!!!

    I know it doesnt sound very serious but I urgently need a wiring diagram of two way switching in UK's old councill house. This is one of the systems where every one way switch has three live wires in it. I know how it works but have no idea how 2 way switching is organised in system like that...

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