Water in Horn/Strobes

[Mike Erb]

We recently completed an all poured concrete 6 level parking garage. All conduits are ENT concealed in the concrete. The Horn/Strobes are weatherproof outdoor rated. After they were installed we immediately had problems with the Horn/Strobes filling up with water from behind. This problem has continued for almost a year now. The problem is exclusive to the Horn/Strobes only not any other devices or lights. Any input from anybody who has had similar problems would be very helpful.

 

[mgookin]

I'm going to sound like a broken record to those who read my posts, but if you contact the manufacturer, they have most likely had this issue before and have a cure.

My guess is the conduit is condensating inside and water goes down (into your devices).

 

[GoldDigger]

:thumbsup: Sometimes you have to provide additional drain holes in weatherproof fixtures to let the water out.

 

[iwire]

Seal the conduits to stop any airflow, do what golddigger mentioned and make a way for the water to get out. I would not waste my time calling the manufacturer.

 

[ptonsparky]

:thumbsup: Sometimes you have to provide additional drain holes in weatherproof fixtures to let the water out.

Dang near always, unless you like callbacks. I haven't figured out why a hole with threaded plug will let water in a box when on "top" but an identical hole with plug will not let the same water out when on the "bottom". Drill a weep hole or cut a gasket.

 

[iwire]

Drill a weep hole or cut a gasket.

I do this with every WP box or conduit body in wet locations.

 

[Mike Erb]

Thanks for all the input. What we ended up doing was installing weatherproof extension rings on the boxes and drilling weep holes in them. This has taken care of the problem so far.

 

[FionaZuppa]

:thumbsup: Sometimes you have to provide additional drain holes in weatherproof fixtures to let the water out.

maybe a T and on the lower end a cap with 1/8" drill weep hole? perhaps the T can be a conduit body so there's a tad more room for the water to stop there, etc. this is a similar method i use for air compressor but there's a auto valve on the end and the T is a bit larger dia so the air velocity slows down a bunch allowing gravity to pull the water down.