Information links (alphabetical order):

• API - American Petroleum Institute, and Introductory Training on API Recommended Practices 500 and 505, Classification of Locations for Electrical Installations at Petroleum Facilities.

• ASME - "Better intrinsically safe than sorry" by Greg Paula, Associate Editor. Intrinsically safe devices and systems are becoming more common at sites with a potential for fire and explosion.

• ATEX 118a  - Directive:  COMMON POSITION (EC) No 13/1999 adopted by the Council on 22 December 1998

• Atlantic Centre for Electrical Technologies - Halifax, Canada. 'Ex Training' which covers the installation and maintenance of electrical equipment in hazardous and potentially explosive environments.
  

• CSA International Hazardous Locations - with information on many topics
  

• DMT/BVS HazLoc page with notes on ATEX, also  EECS ATEX Service.

• Dron & Dixon with content such as Ex Tables and notes on ATEX

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• Dust explosions: Website on dust explosions at www.dustexplosion.info     

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• Epsilon Compliance Limited - including The Epsilon ATEX User Group- ATEX Knowledge Sharing
  

• Ex-INFO Online from PTB
  

• Ex Industries - Hazardous Location Forum  A place to post and review Hazardous Location questions hosted by Ex Industries.
  

• FM wall poster Expert Guide to Hazardous Locations. (Free.)   Also from FM, the publication Approved Product News or download back issue of Approved Product News, Vol 14 No. 3 1998 - In the Zone with FMRC (with article 'Zone Classifications Lower Costs for Hazardous Location Products') from mirror site. (This is an 800k pdf file).
  

• IECEx site describing the Ex Scheme.

• IICA (Institute of Instrumentation and Control Australia Inc.) presentation on NATIONAL AND INTERNATIONAL STANDARDISATION by Chris Agius.

• Instrument Net Web page.

• NEC 2002 expands section 505 for Zones and Methods of Protection. (NEC info. via Mike Holt)

• OSHA Guidelines for Electrical Safety in Hazardous Locations and OSHA Requirements for Hazardous Location Electrical & Miscellaneous Equipment.
  

• Strategic Canada has many excellent links such as: Canadian Patent Database. E.g.: DRAINABLE ENCLOSURE FOR EXPLOSION PROOF ELECTRICAL SYSTEMS
  

• Technical Books and Publications, on Hazardous Locations, available from book distributors and publishers.

• Technical Papers, especially from IEEE such as:  New area classification guidelines

• The Safety Link from International Product Safety News.

• UL wall chart & binder size HazLoc educational poster -available in English, Spanish & Portuguese - free.. UL Field assembly of Ex 'e' boxes, UL Certification of Division 2 motor drives,  UL Hazardous Locations page with notes on "converting certificates". Also notes by Paul Kelly: "Defining Hazardous Locations on a global scale..."

• Zone Quest glossary of terms from Crouse-Hinds.