current

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  1. D

    Intro and question about my current electricians advice on Underfloor heating

    Hi all, I have had an electrician round doing some rewiring. Whilst most seems good i have had a few problems with him crossing lives and neutrals, connections coming apart and a broken pump (blew whilst he is working here says it was nothing to do with him though). I am trying to persevere...
    • David Hughes
    • Thread
    • advice current electricians heating intro question underfloor underfloor heating
    • Replies: 8
    • Forum: The Welcome Forum
  2. R

    And another mad question ("minimum current")

    28. Which one of the following is not considered when calculating the minimum current carrying capacity of live conductors of a cable? a Ambient temperature. b Grouping. c Type of protective device. d The maximum permitted volt drop.
  3. D

    Dealing with Inrush current from ded driver

    Hi, Newbie here so please bear with me if I haven't provided all the details. I am not an electrician but my dad was and my cousin are so I know a few things. My dad has retired now but my cousin is qualified and will do the work for me when he eventually comes round. I need to have everything...
  4. HVManiac

    How much current is drawn by an 18,600 BTU A/C compressor while running at atmospheric pressure

    Hi folks, I recently got a 26 year old hermetic A/C compressor. I plan to use this as a vacuum pump mostly for some of my hobby projects after adding an air filter and a moisture removal setup to it. The specs on the label on the A/C said that it power draw is 2450 Watts, 11.5Amps. Does it...
  5. w0z

    TN-CS main bonding cable typical leakage current question.

    OK I'm prepared for the usual onslaught so here goes... I recently bought a clamp meter Uni-T UT210E. The first thing I did was check it out against my trusted AVOs and also a couple of other cheapo DMM's, (measure current through wire through probes and compare to clamp reading). The clamp is...
    • w0z
    • Thread
    • bonding cable current leakage main question tn-cs
    • Replies: 8
    • Forum: UK Electrical Forum
  6. einstein

    so my current ECS card is valid until 2020

    what happens when i need to update to 18th edition?
  7. Jim90

    Unbalanced current in 3 phase

    Hi guys, Just after a bit of clarity. After installing an energy logging device as per a client’s request we have highlighted that we have over 200A difference between L1 to L2 and L3. The supply is a big commercial science building with 400A per phase. This isn’t due to inrush and is...
  8. G

    maximum residual current RCD

    Hi Everyone, I would like to confirm a question I saw the other day regarding working out the residual current on an RCD The question was similar to the following An earth electrode has been measured and the following readings were taken 1) 21 Ohms 2) 21.02 Ohms 3) 20.8 Ohms What is the...
  9. Y

    Maximum Current Capacity

    How much current capacity can handle in a 16 sq. Mm. Wire size in ac 415 volt supply? Because i have 2 pump motors that will connect to a power source of 415 volts ac 3 phase; 1 motor is 5.5kilowatts and another one is 7.5kilowatts. Both motors will run intermittently and supplying different...
  10. G

    Led lighting residual current

    File location wiring diagram - https://form.jotform.com/80623317513955 six external led lights , with a switch between lights 2-6 for additional control, all materials proper for job, lights run from garage fusebox via MCB, fed from main house fusebox with MCB & RCD protection. cable run rst...
  11. J

    Help working out resistance and supply current please.

    hi, I’m doing some revision and I can’t quite understand working out the resistance of a circuit or the supply current. Could some one please help and explain how it would be done please? I have attached a photo of the network and the question. Thanks
  12. T

    Residual Current v Earth Leakage

    I think I must be missing the blindingly obvious, but..... TT system......100ma time delayed as main switch, then some final circuits (which will require 30ma RCD as includes sockets etc)...then 30ma RCD for other final circuits... Prior to changing CU at customer's request to include 100ma...
  13. O

    New house - does the CU comply to the current regs

    So I was in a new build today - signed off 3 months ago... No surface trunking, all cables in walls and ceilings ..... the OCPD's for circuits 1 to 3 look wrong to me Discuss!
    • Octopus
    • Thread
    • comply current house new regs
    • Replies: 104
    • Forum: UK Electrical Forum
  14. Edward Morris

    Wifi switch in need of neutral wire - advice on current setup

    Hi. In my lounge, I have 3 single gang switches which control a ring of GU10 downlights. I would like to substitute one the switches for a smart home switch, so that I can turn the lights on and off using a phone app. The model I am interested in is the wifiplug glass +. The literature states...

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