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  1. M

    Bathroom UFH earth mesh

    Whist looking up something unrelated in section 701, I noticed reg 701.753 Stating that underfloor heating wire in a bathroom must have an earthed sheath or metallic earth grid etc etc & that electrical separation shall not be used It got me thinking, the underfloor heating wire I used in...
  2. M

    Camper Van Installation Certificate

    If installing a new 230v AC electrical system in a camper van which has the option of being supplied from an inverter from leisure batteries within the van or from a hook up with a change over switch. What supply characteristics are recorded on the certificate The inverter side would be an IT...
  3. M

    What connector is this?

    Does anyone know what connector this is and where one could be sourced from, think its from around 1970s (Before me) Thanks
  4. M

    TT earth rod cable

    Hello, A friend of mine has a garage which is powered from an FCU on a ring final from his house, the garage is a little way from the house and is a TT earthing arrangement (the house PME earth is terminated in a plastic wiska box (where the SWA cable is terminated) and isolated from the...
  5. M

    Electrode Seperation

    Hello I am wondering what would be the correct method for testing electrode separation distance For example, if installing an EV charger or hot tub from a PME supply and chosing to TT the EV charger / hot tub, how could you ensure you are a sufficient distance away from any buried PME bonded...
  6. M

    EV & TNCS Food for Thought

    Just a little thought here, With PME / TN-C-S supplies being most common, and the difficulty with EV charging from this earthing arrangement are: 722.411.4.1: (i) = Very difficult to ensure 3 phase loads are always balanced in the real world (ii) = Unless in a new build with foundation...
  7. M

    BS7909 to Minor Domestic

    Hi all I work in temporary events, mainly concert touring. I have completed BS7909 training and am electrically competent. I have been doing video and power for live events for the last 10 years and luckily enough am quite sought after, However due to Covid19 my industry is very much on hold...
  8. M

    Loop tester different results

    Hello, I have a dedicated loop tester (Martindale EZ2500) and also a Fluke 1662 MFT The reason I have the additional loop tester is often at work I will need to measure P-E & P-N loop impedance only while I am in a harness climbing, or have walked for ages (large concert touring) the EZ2500...
  9. M

    Saftey before RCDs

    I understand the importance of RCDs, what they do & how they can save lives. I agree with there requirements. I also understand you can meet ADS disconnection times with high enough Zs values for relevant fuses or MCBs, etc In the 18th edition the use of RCDs is much more widespread The...
  10. M

    2 module enclosure

    I am not sure if this is acceptable? If I am using a 2 module enclosure for 2 MCBs both fed from a MCB in the main consumer unit. Would I have to use a busbar inside the 2 module enclosure or would it be ok to have a cable link at the bottom of the MCBs. I have heard people say this is a nono...
  11. M

    Outside tap

    Hi all I am on a TN-C-S / PME supply and have an outside tap, I have fitted it with 5 speedfit plastic elbows and a speedfit all plastic valve. So having so much plastic in place that should be the recommended insulated section of pipe to prevent dangerous voltages being on the tap in the event...
  12. M

    Zappi car charger open PEN protection

    Hello, As far as I can work out the Zappi car charger protects against PEN faults buy having a current sensing coil around the protective earth conductor and if a current is detected on the conductor it will disconnect the L, N and PE conductors. just wondering how this meets the regs as in...
  13. M

    12v conversion of 230v light fitting.

    Hello, I am wondering if this is allowed, I dont have a big need to do such a thing, just would like to know how it would stand up with the law and regs etc If you have a class 1 (or class 2 for that matter) light fitting and you wanted to convert it to 12v to make it PELV, for use in an old...
  14. M

    Matt-e open PEN

    Hello Hope your staying safe and well with Covid-19 I am wondering if someone could confirm this for me. I have seen these Single Phase EV Voltage Monitoring and Protection Unit - https://www.cef.co.uk/catalogue/products/4873097-single-phase-voltage-monitoring-and-protection-unit The...
  15. M

    PME carport

    Hello Hope everyone if well with this cover-19 stuff going on Quick question I would like to put a power supply to a metal framed car port, the metal frame is buried into the ground so definitely introduces earth potential, the ground inside the carport is tarmac laid on top of soil The...
  16. M

    Running in a new CPC

    Hi guys I was putting in a spur socket at a friend's house. when i noticed that the CPC is the metal cable trunking. I understand this is within regulations. However upon testing it had a high earth loop impedance and likewise r2. My question is, is it acceptable to run in a new CPC from...
  17. M

    Loop Impedance tester electrical circuit

    Hi A quick one I was wondering if anyone knows how a multifunction tester performs a loop impedance test. I understand how to perform a test and what the results of a loop impedance test give you in working out your PSCC and earth fault current. I use my Fluke multifunction tester every day at...
  18. M

    PSCC from canal boat inverter

    I am soon to be helping a friend with his electrics on his canal boat, he is looking at putting a small consumer unit, with a circuit for sockets and another for lights and upgrades to sockets wiring etc etc All sounds easy enough but I am wondering how to select the correct short circuit...
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