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Student & Learning Zone - City & Guilds
Help On 17Th Edition Regs Question
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<blockquote data-quote="amateursparky" data-source="post: 289165" data-attributes="member: 19593"><p>Hi</p><p></p><p>I'm stuck on this particular question. Our tutor hasn't taught us how to solve this question yet.</p><p></p><p>Could you please explain what it is I need to do to solve this question. I didn't think I even understand what the question is asking!</p><p></p><p>1)An ac circuit is protected by a 20A BS 60898 Type C circuit-breaker and supplementary bonding may be required. In relation to the accessible exposed conductive parts of this circuit and extraneous conductive parts what would be the maximum resistance that would determine the requirement for supplementary equipotential bonding?</p><p></p><p>2)An ac circuit is protected by a 40A BS 88-3 system E and G fuse and supplementary bonding may be required for a</p><p></p><p>disconnection time of 0.4s. In relation to the accessible exposed conductive parts of this circuit and extraneous conductive parts what would be the maximum resistance that would determine the requirement for supplementary equipotential bonding?</p><p></p><p>My tutor said something about using the fuse graphs at the back and the formula on pg66 (green 17th edition). Very confused!! I don't understand how to use that formula either HELP</p></blockquote><p></p>
[QUOTE="amateursparky, post: 289165, member: 19593"] Hi I'm stuck on this particular question. Our tutor hasn't taught us how to solve this question yet. Could you please explain what it is I need to do to solve this question. I didn't think I even understand what the question is asking! 1)An ac circuit is protected by a 20A BS 60898 Type C circuit-breaker and supplementary bonding may be required. In relation to the accessible exposed conductive parts of this circuit and extraneous conductive parts what would be the maximum resistance that would determine the requirement for supplementary equipotential bonding? 2)An ac circuit is protected by a 40A BS 88-3 system E and G fuse and supplementary bonding may be required for a disconnection time of 0.4s. In relation to the accessible exposed conductive parts of this circuit and extraneous conductive parts what would be the maximum resistance that would determine the requirement for supplementary equipotential bonding? My tutor said something about using the fuse graphs at the back and the formula on pg66 (green 17th edition). Very confused!! I don't understand how to use that formula either HELP [/QUOTE]
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Help On 17Th Edition Regs Question
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