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Do-It-Yourself (DIY) Question & Answer Forum
Exported earth
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<blockquote data-quote="steptoe" data-source="post: 4204" data-attributes="member: 7"><p>you run the SWA to the garage (assuming you have calculated for voltage drop etc and have correct size cable)</p><p></p><p>earth the SWA sheath at the house(supply) end only,</p><p></p><p>terminate it to a plastic CU or adaptable box or whatever at the garage side.</p><p></p><p>do NOT carry an earth of any description from the SWA(supply) to the garage.</p><p></p><p>drive an earth rod into the ground and from this run a 16mm or larger,(depending on sub main,or supply size) earth cable to the MET for garage.</p><p></p><p>there you go, garage is now separate TT system.</p><p></p><p>remember to allow selective RCD protection for your sub main and finals in garage.</p><p></p><p>and to route the SWA in prescribed areas.</p><p></p><p>is this what you needed?</p></blockquote><p></p>
[QUOTE="steptoe, post: 4204, member: 7"] you run the SWA to the garage (assuming you have calculated for voltage drop etc and have correct size cable) earth the SWA sheath at the house(supply) end only, terminate it to a plastic CU or adaptable box or whatever at the garage side. do NOT carry an earth of any description from the SWA(supply) to the garage. drive an earth rod into the ground and from this run a 16mm or larger,(depending on sub main,or supply size) earth cable to the MET for garage. there you go, garage is now separate TT system. remember to allow selective RCD protection for your sub main and finals in garage. and to route the SWA in prescribed areas. is this what you needed? [/QUOTE]
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