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Main to out building

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Sorry to bring up this old chestnut but just seeking clarification as it was in 2005 that it was first raised. I am now retired and my last update was C and G 2008

I have been asked to maintain a small sewage tank system for 6 houses. This consists of air pump and controls and lift pump.The pump controls are situated approx 200 metres from the incoming main and earthing / supply is an armoured  cable with cpc which is connected to a TN C S (PME) at origin.

The only metalwork in the tank is a 25mm pipe from lift pump to outlet and internal blower pipework.

Is it allowed to export the PME system in this case or should it have been a TT system with RCD at origin ?

Many thanks FP

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    Hi just to expand, I visited the site yesterday and the origin of the circuit is in fact a 30ma RCBO and all the CPConductors connected to the metal Hager unit and then connected to the PME terminal. So PME with the circuit fed via an  RCBO. Should an earth stake at origin also be fitted?

    Thanks FP
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  • 0
    Hi just to expand, I visited the site yesterday and the origin of the circuit is in fact a 30ma RCBO and all the CPConductors connected to the metal Hager unit and then connected to the PME terminal. So PME with the circuit fed via an  RCBO. Should an earth stake at origin also be fitted?

    Thanks FP
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