This DC submersible motor safe?

[ahsrabrifat]

This is a DC submersible motor. I used it couple of times years ago and it had been unused since then. I need to use it again for a sprinkler project. When I took it out of my almirah today, I discovered this long crack on the motor's body. Do you think it is safe to use this motor anymore?

 

[Nigel Goodwin]

It's only low voltage, so not a safety issue - but presumably the crack means water will get inside, where it's not supposed to, and the motor will probably die after a while.

 

[Grossel]

In short term, the motor may be water cooled - but that is not of any advantage unless it's feed with more than rated power.
In longer term - even if the housing isn't submerged, it seems to be open for dust getting in to the motor itself - that of course being depended on the environment where you plan to put it to use.

[edit]
Wait a minute! You said "sprinkler project" - as in fire extinguisher system ??

Well, in that case - no f... way I'd agreed to use components holding that low of a standard. You need a system that you can actually trust, this motor at the picture can fail at any moment.

 

[Externet]

After well dried, wrap in many turns of tight vinyl insulating tape and test. It is broken, cannot break it more. If works for a while, great.