open pen

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  1. S

    open PEN protection.

    Would any fellow electricians consider using an open PEN device to protect a metal trailer used as a "Canteen". It is likely to be often connected to TNCS (forbidden by 717.411.4) and placed on concrete which makes the use of TT and rod impossible. I can draw similarity to an EV charge point...
  2. johnwicklover

    Does a three-pin socket used for Electrical Vehicle charging need a earth electrode or open PEN fault detection device?

    As the title says, does a three-pin socket (external) used as charging point need an earth electrode or open PEN fault? Are mode 1 and mode 2 exempt from this ? I was under the impression that anything used as EV charging point and if located externally, the installation would need to have...
  3. L

    Open PEN solution

    How many threads have there not been regarding the issues resulting from employing a TNC-S supply system? The current earthing arrangements to mitigate the consequences of a broken DNO neutral are not satisfactory and are not likely to change in the foreseeable future largely due to cost. But...
  4. P

    Open PEN causes?

    The risks related to an open PEN in TN-C-S are often discussed here, say in relation to external supplies to out buildings, etc, but I wondered what is the main reason(s) for an open PEN fault? I assume it is something to do with bad jointing techniques as with concentric cables it would be...
  5. 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...
  6. 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...
  7. 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...
  8. KeenPensioner

    Open PEN in TN-C-S

    I posted this in the DIY section and got little response which is unusual so I'm posting it here. Hope that's OK. I'm still learning so be gentle. I'm trying to understand the consequences of a broken PEN conductor downstream of the DNO service head. If I'm correct, this will cause all...
  9. Ian1981

    Open pen conductors and future 18th edition considerations

    Electrical Safety First’s recent electrical installation safety roundtable focused on open-circuit PEN conductors, which serve as both a protective earthing and neutral conductor. Although PEN conductors within installations have been prohibited for some time now, older ones still remain in, for...

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