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bonding cable tray?
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<blockquote data-quote="Revved Up Sparky" data-source="post: 279393" data-attributes="member: 5050"><p>The question I often ask myself when I look at metal is this; "could this metalwork realistically become live under fault conditions ?" ... if I think yes, I bond it. With cable tray I think you probably have to assess the possibility of it getting struck by something resulting in insulation damage and thus a live conductor coming into contact with the tray. If the tray is'nt earthed then it becomes live. With SWA it's less likely to ever happen as you have the protective steel armouring.... but if someone messed up and the sheath was'nt earthed..... hmm...... . I would always earth cable tray and I would probably use 6mm CSA for many installations.</p></blockquote><p></p>
[QUOTE="Revved Up Sparky, post: 279393, member: 5050"] The question I often ask myself when I look at metal is this; "could this metalwork realistically become live under fault conditions ?" ... if I think yes, I bond it. With cable tray I think you probably have to assess the possibility of it getting struck by something resulting in insulation damage and thus a live conductor coming into contact with the tray. If the tray is'nt earthed then it becomes live. With SWA it's less likely to ever happen as you have the protective steel armouring.... but if someone messed up and the sheath was'nt earthed..... hmm...... . I would always earth cable tray and I would probably use 6mm CSA for many installations. [/QUOTE]
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bonding cable tray?
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