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Metal - clad buildings and the confused forum member.

UKPN
One of the members has queried ESQCR bonding/earthing PME requirements for the above. So its worth spending a little time putting across the companies requirements. Where metal-clad buildings incorporate a steel-frame that utilises steel vertical beams that are within the foundations, the steel frame will provide a good connection with the earth which will effectively limit the earth potential rise.

A PME service may be provided to a metal-clad building provided the following criteria are satisfied:


1. The metal cladding is bonded to the steel-frame.

2. The supply is either three-phase with less than 40% unbalance or the supply is single - phase and the frame to earth impedance is les than 20ohms.

Regards, UKPN?

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    Sparkingchip:

    ..

    UK plumbers, gas fitters and others rarely bother to use temporary bonding kits when cutting sections of metal pipework out, you often see the kits hanging up in their vans, but that’s where they stay..


    I have 2 sets of beefy jump leads in the van. Never saw the need for those puny temp bonding kits either. Gas fitters should be using them, part of the training and reassessment, doubt plumbers are aware of it though.


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  • 0
    Sparkingchip:

    ..

    UK plumbers, gas fitters and others rarely bother to use temporary bonding kits when cutting sections of metal pipework out, you often see the kits hanging up in their vans, but that’s where they stay..


    I have 2 sets of beefy jump leads in the van. Never saw the need for those puny temp bonding kits either. Gas fitters should be using them, part of the training and reassessment, doubt plumbers are aware of it though.


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