Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
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Published 29 May 2020
“Class I, Division 1” Electrical Rotating Machines Electrical machines with “Class I, Division 1” marking are based on “explosion-proof” design. In order to get “C1D1” marking, there are two steps: 1) Ordinary location requirement per standards CSA C22.2 No. 100 for Canada and UL 1004 for the USA. These...
Published 29 May 2020
Hazardous Locations Cable Glands (IECEx, ATEX and North American). Cable glands are used as cable entry devices to provide a safe connection of suitable cables to enclosures and maintain the ingress properties of the installation. In hazardous area classified areas they also need to maintain the explosion protection of...
Published 29 May 2020
The Importance of Grounding of Intrinsically Safe Devices in hazardous areas. Intrinsic safety is system concept and it prevents explosion in hazardous areas by limiting electrical energy. The IS device which is installed in a classified area needs to be connected to a source of power (IS barrier) by...
Published 29 May 2020
“Ex pyb“ Marking for Purging and Pressurization Technique for hazardous use in “Zone 1“. In accordance with standard IEC 60079-2, “Ex pyb” marking provides Equipment Protection Level (EPL) Gb with EPL Gc internal to the pressurized enclosure. It simply means the internal components must be evaluated against hazardous location ...
Published 28 May 2020
Class I, Division 2″, (or C1D2 for short), products are electrical devices approved for use in a hazardous area or location in North America. They can be manufactured anywhere in the world but, they need to be approved only by North American certifying agencies for use in Canada and...
