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Do-It-Yourself (DIY) Question & Answer Forum
Outbuilding supplied from TT
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<blockquote data-quote="steptoe" data-source="post: 27481" data-attributes="member: 7"><p>HMMMM,</p><p></p><p>as the SWA is 10mm the armour will supply the earth no problem, is there good continuity between the armour and cpc of 10mm?</p><p></p><p>not so sure about the metal CU tho,,, do you want to class this as a different installation? or simply a sub main?</p><p></p><p>I would think about changing to plastic CU.</p><p></p><p>I would suspect that the water pipes come from the main building(?) so could therefore just be supplementary bonded. this would raise concerns about disconnecting the armour earth and putting a seperate rod in place....</p><p></p><p>have you tried a continuity between the water pipes and the exported earth?</p><p></p><p>would indicate if there is any continuity between the water pipes and supply earth at present, if so, then simply leave as is and supplementary bond the water,(as a good practice measure only, its not strictly required in the 17th regs)</p><p></p><p>as is, I deffo would NOT put a seperate earth(rod) in place. this is a lot dependant on the water pipes having continuity back to MET though.</p><p></p><p>HTH, Albert.</p></blockquote><p></p>
[QUOTE="steptoe, post: 27481, member: 7"] HMMMM, as the SWA is 10mm the armour will supply the earth no problem, is there good continuity between the armour and cpc of 10mm? not so sure about the metal CU tho,,, do you want to class this as a different installation? or simply a sub main? I would think about changing to plastic CU. I would suspect that the water pipes come from the main building(?) so could therefore just be supplementary bonded. this would raise concerns about disconnecting the armour earth and putting a seperate rod in place.... have you tried a continuity between the water pipes and the exported earth? would indicate if there is any continuity between the water pipes and supply earth at present, if so, then simply leave as is and supplementary bond the water,(as a good practice measure only, its not strictly required in the 17th regs) as is, I deffo would NOT put a seperate earth(rod) in place. this is a lot dependant on the water pipes having continuity back to MET though. HTH, Albert. [/QUOTE]
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