Flooded Electrical Circuits Kept Working!

[Johnsey]

At an office building, a single phase cable joint box below the raised access floor and serving underfloor bus bars become flooded with water.
The circuits are protected by 32A mcb (no RCD protection).
Whilst the joint box was fully flooded with water, the mcb's did not trip.
I am guessing that the fault current was below that needed to operate the mcb, bit I am surprised and would have expected the mcb to trip pretty quickly once the flood had occured.
Does anyone have any similar experiences?

 

[Brightspark2]

Ive come across quite a few 250/400W floodlights that are full of water but still working....

Hi E54,

Did you see that documentry (USA) where they were hosing the live Trans Am pylons down from a helicopter ?, they clipped the helicopter to one of the lines, scary stuff!, they were at half a million Volts due to the distances involved, which is far higher than anything in the UK.

I believe the supergrid has parts at 500kV???...

 

[Engineer54]

I believe the supergrid has parts at 500kV???...

As far as i'm aware, the highest voltage used for transmission in the UK is 400KV!! In the States you have 500KV/750KV and even 1MV, but then they have far greater transmission distances, than you have in the UK!!

 

[Knobhead]

The higher voltages are often at DC to couter reflected power over long distances. Only something I’ve read about.