Consumer units and equipment outdoors

GTB: 
 

Alcomax, Zoomup,

Thanks for the instructions on the MK Masterseal unit, but read the wording carefully (Note 3) the drilling of the drain hole (5mm) is ONLY when you have conduit entering from the top or side entries. So conduit from the bottom, or any type of cable gland entry the Note 3 does not apply. Reason being the conduit is a hollow tube and conden

IP66 as I have mentioned before is dust tight, i.e dust cant enter, so with the definition of dust as “finely divided solid particles, 500 μm or less in nominal size, which may be suspended in air, may settle out of the atmosphere under their own weight” then I doubt your small drilled hole 3 or 4mm would prevent dust entering, if you have conductive dust then that starts all sorts of other issues when it settles over a period of time on the insulating surfaces/contacts within the enclosure.

 

I mainly install 13 Amp weatherproof sockets on house walls for use of equipment outdoors.

What kind of conductive dust are you referring to? I can't think of any in my experience.

Also, for any dust to enter a sealed enclosure with just one small drain hole at the bottom an equal amount of air has to escape from the same enclosure. This can not happen. There is not convection air movement.

You are worrying needlessly.

Z.

GTB: 
 

Alcomax, Zoomup,

Thanks for the instructions on the MK Masterseal unit, but read the wording carefully (Note 3) the drilling of the drain hole (5mm) is ONLY when you have conduit entering from the top or side entries. So conduit from the bottom, or any type of cable gland entry the Note 3 does not apply. Reason being the conduit is a hollow tube and conden

IP66 as I have mentioned before is dust tight, i.e dust cant enter, so with the definition of dust as “finely divided solid particles, 500 μm or less in nominal size, which may be suspended in air, may settle out of the atmosphere under their own weight” then I doubt your small drilled hole 3 or 4mm would prevent dust entering, if you have conductive dust then that starts all sorts of other issues when it settles over a period of time on the insulating surfaces/contacts within the enclosure.

 

I mainly install 13 Amp weatherproof sockets on house walls for use of equipment outdoors.

What kind of conductive dust are you referring to? I can't think of any in my experience.

Also, for any dust to enter a sealed enclosure with just one small drain hole at the bottom an equal amount of air has to escape from the same enclosure. This can not happen. There is not convection air movement.

You are worrying needlessly.

Z.