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Old Breaker Could Be The Culprit


Dal Roberts

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Dal Roberts

Ring main tested everything all sound circuitry , mcb Wylex NB30 , 30a type 2 , suddenly trips say after 4 days, 2 days random etc , then doesn't reset , then resets again a day later , i think it could be the bi metallic strip on its way out or the solenoid , any pointers would be useful or if anyone has had similar experiences would be grateful  

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Sidewinder

Appliances, accessories?

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Murdoch

Tests done on circuit? Any changes made? What appliances are plugged in?

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Sharpend

How do you know that there's not a faulty appliance that's cause the problem? Have you swapped out the mcb to eliminate?

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ProDave

+1

 

Test circuit properly and that includes I/R

 

Swap MCB to eliminate that.

 

I've had s similar problem when it trips at "random" whenever someone stood on a particular floor board upstairs.

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Dal Roberts

Appliances, accessories?

 

Omitted everything including FCU connections to boiler etc , I'm going to swap 30mcb down (problematic) with upstairs 30 no problems and see if that works , in the meantime ill order a secondhand NB30 on ebay

+1

 

Test circuit properly and that includes I/R

 

Swap MCB to eliminate that.

 

I've had s similar problem when it trips at "random" whenever someone stood on a particular floor board upstairs.

Hi dave yes IRd L/N N/E L/E , R1 R2 ring cross connect all the same readings , visual inspect at each socket all good connections , so it really only leaves the MCB, has to be that , can go for 4 days etc until mcb trips and no reset , got to be bi metallic strip heating over a period of time and faulty , I'm going to swap downstairs ring (problem ) with upstairs (no problem) and eliminate the MCB 

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NozSpark

What current are the adjacent MCB's running at?

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steptoe

PM me your address, I'll stick one in the post to you, 

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Dal Roberts

Been round the clients , guess what MCB stays on no trip , have now swapped up and down ring main breakers, if it goes again on upstairs ring (was originally on downstairs) then i know for sure its the breaker itself. its got to be a duration and temperature factor thats upsetting the MCB and causing the phantom trip 4 or 5 days after I've been 

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