Evolution of a “hybrid” system that integrates the best concepts from the NEC, CEC and IEC

The Canadian Electrical Code (CEC) is a prescriptive code that mandates the use of products that are certified to CSA standards and defines how electrical systems are installed. In Section 18, the CEC requires that the zone method of hazardous area classification be used for all new installations. The code is not specific about the products used and permits both IEC and class/division products. Both the US based National Electrical Code (NEC) and internationally based IEC deal with hazardous locations. These differ to varying extents to the CEC in their acceptable products and installation methods. In Alberta Canada, the authority having jurisdiction, or regulator, has permitted qualified users the flexibility to adapt or combine elements from the CEC, NEC and IEC into a single operating system to take advantage of the best in global technologies. This has resulted in a unique blended system that combines the best of the traditional North American and International approaches and provides cost savings over traditional electrical installations. This "hybrid system" not only maintains the benchmarks for reliability and safety, it has improved or enhanced them. In developing this approach, users have seen significant reductions in installation costs. Some examples include modularization using plug-and-play wiring systems for heat tracing, lighting systems, and power distribution, basket tray, hybrid panel boards and modular construction (re-locatable structures/buildings and packaged equipment). While many of these concepts were initiated for material and labour installed cost efficiencies, they have ultimately yielded in significant reliability, maintainability and safety enhancements recognized afterwards. This paper will discuss some of the elements used to develop this hybrid approach in terms of global technology equipment designs and wiring practices.