I have seen large industrial UPSs or battery chargers that have IP22 roofs. The roofs cover over fan grilles on the top, leaving approx. 50 mm of air for ventilation.
Though they may be used to stop water drips or condensation coming off pipes, they are mostly intended to keep cut stranded wires, small objects, screws, dust, etc. out of the fan ducts. They very unofficially serve as a place for electricians to sit while they are populating overhead cable trays or installing conduit. Don Gies Internal From: Stultz, Mark <00000f79f2e10e47-dmarc-requ...@listserv.ieee.org> Sent: Monday, February 14, 2022 9:55 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] IP Code Question [External email: Use caution with links and attachments] ________________________________ Hi Brian, The IP ratings apply to continuous situations unless stated otherwise. So IPX2 means that water drops can be continuously falling at 3mm/min when the EUT is tilted up to 15°. The test lasts for 2.5 minutes per side, but the environment is considered continuous. For our machinery with IP32, we typically make sure that any water that enters the enclosure will be directly away from any components therein and toward drain holes at the bottom of the enclosure. Best regards, Mark Stultz From: Brian Kunde <bkundew...@gmail.com<mailto:bkundew...@gmail.com>> Sent: Monday, 14 February, 2022 9:23 AM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] IP Code Question CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. An IP code of IPx2 implies the enclosure protects against the ingress of water drops at 15° tilt. Now, most PC enclosures protect the electronics from occasional exposure to water drops, but it is not designed to be exposed to water drops continuously. So can you rate an electronic device IP22, for instance, but not intend it to be used outside or in an environment where it is exposed to water on a regular basis? Thanks for your input. The Other Brian - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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