1mm dia. seems a bit small to me - you'd likely get a pool of water inside the fitting as surface tension will almost certainly hold the water back against the small force of gravity - there being no water pressure behind it. I think the recommendation used to be for a drainage hole in conduits systems of at least 3mm - and I'm pretty sure MK recommend 5mm for their masterseal range.
- Andy.
I drill at least two per enclosure, one to let the water out, and the other to let air in. A 1.0mm dia. hole will allow water to drain through, but vapour is mostly catered for. I use that small drill on things like P.I.R. sensors. It is better to use a 2 or 3mm dia. drill for sockets and switches outdoors I agree.
1mm dia. seems a bit small to me - you'd likely get a pool of water inside the fitting as surface tension will almost certainly hold the water back against the small force of gravity - there being no water pressure behind it. I think the recommendation used to be for a drainage hole in conduits systems of at least 3mm - and I'm pretty sure MK recommend 5mm for their masterseal range.
- Andy.
I drill at least two per enclosure, one to let the water out, and the other to let air in. A 1.0mm dia. hole will allow water to drain through, but vapour is mostly catered for. I use that small drill on things like P.I.R. sensors. It is better to use a 2 or 3mm dia. drill for sockets and switches outdoors I agree.
