Flooding with cu totally immersed

[Jabbajaws]

Can anybody explain this to me as im rather puzzled?

Due to flooding in the mytholmroyd area, l was called to a house to inpsect a CU, which had been totally immersed in water, including the service fuse which is BS 1361 100A.

The water was drained, prior to me attending.

Now is what puzzles me:

The power remained on during the flooding and also afterwards. I would have expected the service fuse to have blown during this event but it didn't and l can not for the life of me understand why.

Does anybody know why it didn't?

 

[Sparky Ninja]

If it was a flash flood and the installation was not really under much load then there is no reason to expect it to shut down.

Same as how some luminaires can get flooded with water and not trip an MCB

 

[Richard Burns]

Clean water is not very conductive and you need a very large current to trip breakers /blow fuses, I would not have liked to stand in the water though!
I would expect an RCD to trip but not a breaker/fuse.

 

[Jabbajaws]

Thanks guys, thats a little clearer now....

 

[Moses]

Can anybody explain this to me as im rather puzzled?

Due to flooding in the mytholmroyd area, l was called to a house to inpsect a CU, which had been totally immersed in water, including the service fuse which is BS 1361 100A.

The water was drained, prior to me attending.

Now is what puzzles me:

The power remained on during the flooding and also afterwards. I would have expected the service fuse to have blown during this event but it didn't and l can not for the life of me understand why.

Does anybody know why it didn't?

Water conductivity - Lenntech

 

[MKS]

I once changed over some fluros in a kitchen that had flooded from rooms above, lights were still full of water, but miraculously still worked!