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Surge protected extension lead tripping rcd?
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<blockquote data-quote="davetheglitz" data-source="post: 33001" data-attributes="member: 173"><p>Just a thought. These things are voltage dependant. When you do an insulation test - with one of these in circuit it will be around 3M at 500v but around 0.3M at 500v.</p><p></p><p>Assuming a voltage spike occurs for some reason due to switching/lightening strike - whatever - it's feasible that the resistance to earth will drop down below 8k (240v at 30mA) and cause the RCD to trip. This would explain the random nature of the trip.</p><p></p><p>I would suspect that the trip occurs when there is virtually nothing else on in the house, as I reckon a substantial load like a cooker or heater would prevent the voltage spike building up.</p><p></p><p>Of course it could just be knackered!</p></blockquote><p></p>
[QUOTE="davetheglitz, post: 33001, member: 173"] Just a thought. These things are voltage dependant. When you do an insulation test - with one of these in circuit it will be around 3M at 500v but around 0.3M at 500v. Assuming a voltage spike occurs for some reason due to switching/lightening strike - whatever - it's feasible that the resistance to earth will drop down below 8k (240v at 30mA) and cause the RCD to trip. This would explain the random nature of the trip. I would suspect that the trip occurs when there is virtually nothing else on in the house, as I reckon a substantial load like a cooker or heater would prevent the voltage spike building up. Of course it could just be knackered! [/QUOTE]
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Surge protected extension lead tripping rcd?
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