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New Circuit to 17th?
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<blockquote data-quote="binky" data-source="post: 16466" data-attributes="member: 490"><p>Better to lose the job??? You can justify undersize main earth bond by use of the adiabatic equation ie you will need to calculate cable size for that particular installation based on measurement of Ze etc. (never had a fail yet, which begs the question why are bonds so big?). Never tried to apply this to MEB, which has got me thinking for the rest of the day. But the overall emphasis in the regs is update installations as you proceed with work, hence MEB and Main Earth appear on certificates, and I would proceed down this tack.</p><p></p><p>You could always quote for earths upgrade as <em>highly recomended</em> additonal <em>safety</em> work. Kind of gives customer feeling that you are a safe installer and gives you the edge over competition (doesn't always work).</p><p></p><p>If the customer chooses not to have it done then notify it on cert - as much as I agree with KME and others above, there's also nothing in regs to say you can force customers to update ( how else can you do repairs to 14th edition installations), it's your judgement under these circumstances as to whether to proceed with job or not.</p></blockquote><p></p>
[QUOTE="binky, post: 16466, member: 490"] Better to lose the job??? You can justify undersize main earth bond by use of the adiabatic equation ie you will need to calculate cable size for that particular installation based on measurement of Ze etc. (never had a fail yet, which begs the question why are bonds so big?). Never tried to apply this to MEB, which has got me thinking for the rest of the day. But the overall emphasis in the regs is update installations as you proceed with work, hence MEB and Main Earth appear on certificates, and I would proceed down this tack. You could always quote for earths upgrade as [I]highly recomended[/I] additonal [I]safety[/I] work. Kind of gives customer feeling that you are a safe installer and gives you the edge over competition (doesn't always work). If the customer chooses not to have it done then notify it on cert - as much as I agree with KME and others above, there's also nothing in regs to say you can force customers to update ( how else can you do repairs to 14th edition installations), it's your judgement under these circumstances as to whether to proceed with job or not. [/QUOTE]
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