Hi, been to a job today and it was a funny one! The rccd was tripping! Found fault to be on down ring main! Unplugged everything and it stayed on! I then plugged in their 4 way surge protected extension bar and it tripped immediately! Nothing was plugged into the bar! So a faulty extension bar! Left the house and was stopped by a neigbour saying there power was tripping too! I went in and to cut a long story short found they had the same problem, a surge protected extension bar causing the rccd to trip! Never had this before? How do these surge protecters work and how would it cause the rccd to trip?
Rccd tripping
- Thread starter sherman0251
- Start date
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http://en.wikipedia.org/wiki/Surge_protector
I suppose they could have taken a surge causing them to fail.
I suppose they could have taken a surge causing them to fail.
Sherman, could you replace your keyboard please?
Yours is generating exclamation marks instead of full stops.
Yours is generating exclamation marks instead of full stops.
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Thanks for the quick reply. I had a feeling that they had had a surge which caused then to fail but was wondering how these anit surge units were made and wat happened inside them to cause an earth fault.
I'm just curious.
And sorry for the exclamation marks I'm using my iPhone and its habbit.
I'm just curious.
And sorry for the exclamation marks I'm using my iPhone and its habbit.
These surge protectors actually are not often the cause of the problem, but contribute to it.
A fault on a non RCD protected way can manifest itself onto the RCD side of a board, via these surge protectors.
Can I ask - did you use an insulation tester at all in your fault finding?
A fault on a non RCD protected way can manifest itself onto the RCD side of a board, via these surge protectors.
Can I ask - did you use an insulation tester at all in your fault finding?
A surge arrester has components which start to conduct once the voltage between phase and neutral, phase and earth or earth and neutral exceed a predetermined threshold. If they take a surge from say a lightening strike it may fry these components which could cause them to go low resistance or open circuit, in the case of low resistance with anything between a live (phase/neutral) conductor and earth will cause a fault and can cause an RCD to trip.
Surge arresters are a bit of a nuisance when PAT testing as they usually show up with a low IR fault.
Surge arresters are a bit of a nuisance when PAT testing as they usually show up with a low IR fault.
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