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<blockquote data-quote="paulh" data-source="post: 11539" data-attributes="member: 656"><p>good info ...slightly off topic but did you see this!</p><p></p><p>quote</p><p></p><p>It is recommended that in order to minimise unwanted</p><p></p><p>tripping, the sum total of standing leakage currents</p><p></p><p>should not exceed 25% of the tripping current rating</p><p></p><p>(IΔn) of the RCD protecting the circuit(s).</p><p></p><p>Modern fluorescent fittings with electronic ballasts can</p><p></p><p>have 1mA leakage current for every tube.</p><p></p><p>IT equipment may have up to 3.5 mA leakage at each</p><p></p><p>work station.</p><p></p><p>It can therefore be seen that a single 30 mA RCD is only</p><p></p><p>suitable for a few items of equipment. If too many items</p><p></p><p>are connected, unwanted tripping is bound to occur and</p><p></p><p>when a problem occurs it is likely to bounce back to the</p><p></p><p>contractor.</p><p></p><p>unquote</p><p></p><p>does this mean more than say 7 flourescent fittings on a cct will be a no no? tum te tum te tum</p></blockquote><p></p>
[QUOTE="paulh, post: 11539, member: 656"] good info ...slightly off topic but did you see this! quote It is recommended that in order to minimise unwanted tripping, the sum total of standing leakage currents should not exceed 25% of the tripping current rating (IΔn) of the RCD protecting the circuit(s). Modern fluorescent fittings with electronic ballasts can have 1mA leakage current for every tube. IT equipment may have up to 3.5 mA leakage at each work station. It can therefore be seen that a single 30 mA RCD is only suitable for a few items of equipment. If too many items are connected, unwanted tripping is bound to occur and when a problem occurs it is likely to bounce back to the contractor. unquote does this mean more than say 7 flourescent fittings on a cct will be a no no? tum te tum te tum [/QUOTE]
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