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Electrical Inspection & Testing Forum
Rfc Lenghth As Per Resistance Value
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<blockquote data-quote="BES" data-source="post: 307481" data-attributes="member: 20428"><p>Just to clarify guys R1+R2 reading was measure at approx the mid point of the ring. The problem is as its protected by a rcbo type c i was concern about the overcurrent side of rcbo not disconneting . If i work thiss out correct and r1 &amp; rn being same 1.42 * by 2 divuide by 4 = 0.71 when measuring R1+Rn loop at sockets im getting approx 0.7 this value used to calculate the If does not disconnect the rcbo if short circuit LN. I have made customer aware of this and told them to remede the rcbo needs changing to a type b. But they told me they would get back to me matbe they think im making extra work iver done all i can by noting on cert.</p></blockquote><p></p>
[QUOTE="BES, post: 307481, member: 20428"] Just to clarify guys R1+R2 reading was measure at approx the mid point of the ring. The problem is as its protected by a rcbo type c i was concern about the overcurrent side of rcbo not disconneting . If i work thiss out correct and r1 & rn being same 1.42 * by 2 divuide by 4 = 0.71 when measuring R1+Rn loop at sockets im getting approx 0.7 this value used to calculate the If does not disconnect the rcbo if short circuit LN. I have made customer aware of this and told them to remede the rcbo needs changing to a type b. But they told me they would get back to me matbe they think im making extra work iver done all i can by noting on cert. [/QUOTE]
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Rfc Lenghth As Per Resistance Value
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