Circuit Breaker is not tripped but no power

[vsafa]

Hi there, I was testing the power in the boiler yesterday and by my mistake a short circuit happened and boiler's circuit breaker tripped.Now circuit breaker is not tripped but there is no power in boiler. Boiler's CB is connected to another 2 pole CB by a copper terminal. I checked the power for boiler's cb and there is no power in it. Can you please tell me what happened exactly? Thanks

 

[ProDave]

Check the source where it gets it's power from, a fuse box, consumer unit etc.

 

[vsafa]

Thanks ProDave. It's connected to a 2 pole circuit breaker. 

 

[ProDave]

Thanks ProDave. It's connected to a 2 pole circuit breaker. 

So you said there is no power coming OUT of that 2 pole breaker. Is there power going INTO it?  Keep following it back to it's source.

 

[vsafa]

https://ibb.co/P5hw3ys
https://ibb.co/MN9gXKn
https://ibb.co/d5d7T38
https://ibb.co/9VTGmrc

 

[vsafa]

Power comes out of one pole but there is no power coming out of the pole which is connected to the boiler's circuit breaker.  The whole house has power except the boiler.

 

[kerching]

A) what are you testing it with?

B) is there a switched fuse adjacent to boiler controls?

C) have you blown a fuse inside the boiler?

D) why were you testing  the power inside the boiler in the first place ?

 

[Murdoch]

Can you post a picture of the whole fuseboard?

 

[vsafa]

Can you post a picture of the whole fuseboard?

Yes sure:
https://ibb.co/wy5qMCZ

https://ibb.co/DDWr334

 

[ProDave]

What country are you in?

That is nothing like what we are used to in the UK.

the double pole "main switch" would normally switch L and N here for everything.  Instead the left pole of the main switch switches the L to the boiler MCB and the right pole of the main switch is switching the L to a load of other stuff.

There is obviously no power in to the white cable entering the main switch top left so you need to follow that back to it's source to find out what else you have blown.

 

[Sharpend]

That’s not quite a text book install! 
why is the earth bar connected to the second neutral bar? 
I’d suggest you need a proper electrician to take a look at that install. It really needs sorting, it looks as though it was formerly a dual rcd board that has been bodged into a single rcd board badly. 
power to your boiler is the least of your worries. 

 

[SPECIAL LOCATION]

Hi there, I was testing the power in the boiler yesterday and by my mistake a short circuit happened and boiler's circuit breaker tripped.Now circuit breaker is not tripped but there is no power in boiler. Boiler's CB is connected to another 2 pole CB by a copper terminal. I checked the power for boiler's cb and there is no power in it. Can you please tell me what happened exactly? Thanks

How What & Why were you testing.....??

Obviously you have poked something that has a low resistance conductance between two points that should not have a low resistance between them...

Is that a 20A type C breaker supplying the boiler?

I am hoping there is another lower rated fuse somewhere... other wise it could well have cooked quite a few components to level well over Medium-Rare!

You say the circuit breaker tripped.. But now it's not tripped?

Do you mean you have switched it back on after it tripped?

Have you verified continuity between the terminals of the circuit breaker?

Sometimes the switch may need wiggling up & down a few times if it doesn't make a good electrical contact when first reset..

I've had similar situation on an old board where the breaker has not been operated for a long time..

First push putting lever back into the up 'on' position doesn't actually re-make the 'ON' connection between the MCBs contacts..

(Few wiggles off/on/off/on/off/on etc.. and then the voltage is finally output back to the circuit).

As for what happened exactly..?  

That is quite difficult as none of us were there watching what you were doing!!!?

I am guessing.. You poked...  went bang...  power gone!!!

but that's just guessing?

+ as others have mentioned...  I really do hope this is NOT a UK installations otherwise I would be suggesting legal action against the original installer!

Guinness  

 

[Sidney]

Where does the other end of the white cable at the top of the double pole switch come from?

 

[kerching]

Deary deary me, that board is a mess....well by UK wiring standards and best practice.  Please tell me you are not in the UK!

 

[Andy™]

WTGrape is that board supposed to be!?

 

[kerching]

The MCB thrown  in on the extreme right hand side is a Brighthome.....this is the level of incandescent illumination  provide when it bursts into flames

seem to Only be available in NZ so I think we are safe ....hopefully

but by UK standards that board is a FRICKING disgrace

just saying, no offence

 

[Phoenix]

Its ok chaps, I've got one here that definatly is in the UK: https://ibb.co/xgQwM54

Its got that half busbar thing wylex used to do, so the breakers jump out at you if you catch the bottom edge of them with the cover!

 

[Andy™]

and i thought this was bad

 

[Sharpend]

Is that earthing or bonding within the board? Don’t remember being taught that all those years back is it a new thing or before my time? @Evans Electric ? 

 

[kerching]

Well you've certainly rolled the dice on that one!.....do,ya feel.lucky?