Submersible Cable box

sumer_negi · Posted: Thu Jul 20, 2006 6:35 am Post Subject: Submersible Cable box

I want 2 use a submersible cable box in fountain having 10-12 nos. 230/12V Transformer in it and having incoming and outgoing wires from it. pls tell me wat provision i hv 2 made for this. its urgent. thanx.

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Steve · Posted: Thu Jul 20, 2006 10:58 am Post Subject:

submersible cable box? not aware of such an item, and would not use one anyway unless it was resin / putty filled.

ban-all-sheds · Posted: Thu Jul 20, 2006 1:47 pm Post Subject:

Is India in the UK now?

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plugwash · Posted: Thu Jul 20, 2006 4:34 pm Post Subject:

you can get IP68 glands and enclosures but unless there is no other real option (say a fountain cluster in a big lake) i'd seriously advise not doing this.

RF Lighting · Posted: Thu Jul 20, 2006 5:28 pm Post Subject:

The only truly submersible joint that I know of is a could pour resin joint.

I think this is what you were getting at, but I find it so hard to understand this txt spk

breezer · Posted: Thu Jul 20, 2006 7:59 pm Post Subject:

the simple answer is you can't do as you suggest

if the box were water tight it would develop condensation, ruining your transformers, to resin fill them is a good idea in theory, but that would still leave a cavity around each transformer. (and if it didnt the trasformers may overheat) best option dig deep get submersible transformers made for the job

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plugwash · Posted: Thu Jul 20, 2006 8:05 pm Post Subject:

breezer wrote:

if the box were water tight it would develop condensation

stick some silica gel crystals in it just before you seal it up to take the moisture from the air.

breezer · Posted: Thu Jul 20, 2006 9:15 pm Post Subject:

silica gel will only work for a short while

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plugwash · Posted: Thu Jul 20, 2006 11:37 pm Post Subject:

if the box is truely watertight (which may admittely be difficult to achive) then once the initial damp is removed by the silica gel no more should get in.

sumer_negi · Posted: Fri Jul 21, 2006 4:27 am Post Subject: Thanks

Thanks to all of u for ur suggestions. it will definetely help me.

Steve · Posted: Fri Jul 21, 2006 9:39 am Post Subject:

breezer wrote:

the simple answer is you can't do as you suggest

i hope that bit was of particular use to yourself.

jeepmadmike · Posted: Sat Jul 22, 2006 2:51 pm Post Subject:

There is several options, i would extend the cables and fit the transformers above the water line. i would expect the transformers will be ok if fitted in a resin sealed joint kit the water will keep them cool but one big enough is going to get expensive.

simple primitive solutions,
fit the transformers in a "diving bell" type enclosure, that is a bucket turned upside down. The air pocket will stop the water getting in!

Fit the transformers in a IP68 enclosure and hope for the best!

One thing i have seen done to great effect is pressurise the enclosure with air (using a fish tank air pump) that keeps the water out but condensation can be an issue unless there is adequate heat to stop it forming.