Centrifugal Fan – IACS Non sparking standard

The International Association of Classification Societies (IACS) have a single page document which details the requirements of Anti-Sparking fans.

To download visit: https://iacs.org.uk/resolutions/unified-requirements/ur-f

You are looking for the document titled UR F29 Rev6 CLN – UR F29 Non-sparking fans – Rev.6 June 2005. You will need to sign up for an account in order to download for free.