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Do-It-Yourself (DIY) Question & Answer Forum
outside supply (garage/shed)
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<blockquote data-quote="steptoe" data-source="post: 20101" data-attributes="member: 7"><p>ah ha.! said alan.</p><p></p><p>as its a sub main it doesnt require RCD protection,</p><p></p><p>but now as we are talking beyond the scope of domestic, and basics of 7671 it all comes down to design.</p><p></p><p>if the designer of the circuit can determine the safety of returning the earth from the remote building then it is perfectly viable.</p><p></p><p>my posts on this have been on the basis of a domestic, as only a householder would not think of the dangers about exporting PME.</p><p></p><p>tho your designer must have had some pretty good earthing arrangements to ensure the integrity of the installation to decide to take the PME earth outside the equipotential zone.</p><p></p><p>I cant honestly of the top of my head come up with any viable reason why it should be done,</p><p></p><p>tho I am open to suggestions.</p></blockquote><p></p>
[QUOTE="steptoe, post: 20101, member: 7"] ah ha.! said alan. as its a sub main it doesnt require RCD protection, but now as we are talking beyond the scope of domestic, and basics of 7671 it all comes down to design. if the designer of the circuit can determine the safety of returning the earth from the remote building then it is perfectly viable. my posts on this have been on the basis of a domestic, as only a householder would not think of the dangers about exporting PME. tho your designer must have had some pretty good earthing arrangements to ensure the integrity of the installation to decide to take the PME earth outside the equipotential zone. I cant honestly of the top of my head come up with any viable reason why it should be done, tho I am open to suggestions. [/QUOTE]
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