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Student & Learning Zone - City & Guilds
Does this pipework need bonding?
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<blockquote data-quote="ADS" data-source="post: 287381" data-attributes="member: 7231"><p>You divide the nominal voltage to earth of the installation by the current that you wish not to exceed and then take away the hand to hand impedance of the human body.</p><p></p><p>Your answer will be in ohms.</p><p></p><p>If the measured resistance between the 'conductive part' in question and the MET of the installation is bigger than this answer, then the 'conductive part' is not 'extraneous'.</p><p></p><p>Unfortunately, in the OPs example, the pipework is already bonded to the MET, so the measured resistance reading is going to be a lot lower than the answer to the equation, so you are looking for something different........I'll let you tell us what......? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> </p><p></p><p><span style="font-size: 8px"><span style="color: #C0C0C0">---------- Post Auto-Merged at 23:09 ---------- Previous post was made at 23:04 ----------</span></span></p><p></p><p>I'd say you have to bond it, then.</p></blockquote><p></p>
[QUOTE="ADS, post: 287381, member: 7231"] You divide the nominal voltage to earth of the installation by the current that you wish not to exceed and then take away the hand to hand impedance of the human body. Your answer will be in ohms. If the measured resistance between the 'conductive part' in question and the MET of the installation is bigger than this answer, then the 'conductive part' is not 'extraneous'. Unfortunately, in the OPs example, the pipework is already bonded to the MET, so the measured resistance reading is going to be a lot lower than the answer to the equation, so you are looking for something different........I'll let you tell us what......? ;) [SIZE=8px][COLOR=#C0C0C0]---------- Post Auto-Merged at 23:09 ---------- Previous post was made at 23:04 ----------[/COLOR][/SIZE] I'd say you have to bond it, then. [/QUOTE]
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Student & Learning Zone - City & Guilds
Does this pipework need bonding?
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