Daft installations youv'e had to fix

[Raveninghorde]

Writing another post I started thinking about bad installation of kit.

I got called to site once because some 3 phase power monitors were
misreading. They were installed with large air con units on the roof
of a large office block.

They were installed in IP65 cases. I opened a case and asked the guy,
why had someone drilled holes in the bottom of the case. The answer
was to let the water out. The cases were IP65 but the wiring conduits
were working like water pipes and water was running into the cases.
All terminals were corroded.

I guess the water was distilled by the humidifiers otherwise I don't
know why the fuses didn't blow. May be they did blow which is why they
drilled holes to let the water out.

 

[Joerg]

Writing another post I started thinking about bad installation of kit.

I got called to site once because some 3 phase power monitors were
misreading. They were installed with large air con units on the roof
of a large office block.

They were installed in IP65 cases. I opened a case and asked the guy,
why had someone drilled holes in the bottom of the case. The answer
was to let the water out. The cases were IP65 but the wiring conduits
were working like water pipes and water was running into the cases.
All terminals were corroded.

I guess the water was distilled by the humidifiers otherwise I don't
know why the fuses didn't blow. May be they did blow which is why they
drilled holes to let the water out.

Reminds me of A Kenian driver who used Nigerian beer in the brake system
of his car to save a buck (don't do this!). Asked why he used Nigerian
beer and not a domestic brand: "It brakes better."

 

[Raveninghorde]

I have seen water build up in conduit that ran from a rain proof
outdoor box to inside a building. The temperature differences would
make parts of the conduit drop below the dew point. The water would
run to the lowest spot which happened to be in the airconditioned area
where it was kept cooler than outdoors.

That's a good explanation. Thanks