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Do-It-Yourself (DIY) Question & Answer Forum
PME EARTHING FOR DUMMIES
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<blockquote data-quote="VoltzElectrical" data-source="post: 229697" data-attributes="member: 10749"><p>just checking that i have got this right.</p><p></p><p>In a PME system, the current is returned via the neutral, so if this connection (outside the premises) is lost for whatever reason, the current is then returned via the earth. If the premises are bonded correctly, no raise in potential can happen.</p><p></p><p>If you export the PME connection to an un-bonded outhouse with extraneous conductive parts, there would be a potential difference between these parts and earth, rendering it dangerous?</p><p></p><p>Please, I don't want to turn this into another thread on exported PME, hence why i have not and will not look back through the old threads, as I have read them all already, and still don't understand!</p><p></p><p>I was just reading an article on earthing in Wiring Matters and wanted to clarify the science behind what i was reading.</p><p></p><p>Thanks, and please correct me if I'm wrong. Let's make this matter simple, hence the title, PME for Dummies.</p></blockquote><p></p>
[QUOTE="VoltzElectrical, post: 229697, member: 10749"] just checking that i have got this right. In a PME system, the current is returned via the neutral, so if this connection (outside the premises) is lost for whatever reason, the current is then returned via the earth. If the premises are bonded correctly, no raise in potential can happen. If you export the PME connection to an un-bonded outhouse with extraneous conductive parts, there would be a potential difference between these parts and earth, rendering it dangerous? Please, I don't want to turn this into another thread on exported PME, hence why i have not and will not look back through the old threads, as I have read them all already, and still don't understand! I was just reading an article on earthing in Wiring Matters and wanted to clarify the science behind what i was reading. Thanks, and please correct me if I'm wrong. Let's make this matter simple, hence the title, PME for Dummies. [/QUOTE]
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