IP44 & IP65

In article , John Smith writes

Only the 2nd number is relevant for waterproofing - the 1st number is about protection against solids.

IP(4)4 means "Protected against direct sprays from all directions - limited ingress permitted"

IP(6)5 means "Protected against low pressure jets from all directions - limited ingress permitted"

In effect this means that you should drill a small drain hole in the bottom of the fixture to let out any water which gets in, and either will be fine.

IP ratings are generally better the higher the number - it's actually treated as 2 digits, the first specifying the protection against solids, the second against liquids.

Have a look at

Personally, I'm not sure an IP44 light would stand up to a British winter outside, myself...

Gordon

Personally, I'd only install IPx4 in a relatively sheltered location where it will only be subject to occasional small amounts of rain. If it is on an exposed face, I'd want at least IPx5, even if IPx4 is technically acceptable.

If it is on a sheltered wall, such as the narrow side passage of a Victorian terraced "extension" or between two semis or under a tree, then it wouldn't be so bad.

Christian.

I would describe heavy rain as "direct sprays from all directions" rather than "low pressure jets from all directions" so I will go with a IPx4 rated light.

Thanks,

John

In article , Christian McArdle writes

In my experience, even supposedly IP66 fixtures get water in them somehow.

If you drill a small hole at the lowest point to allow water to get out, it does not cause a problem. It's when water gets stuck inside and condenses on everything that the problems start.