The Temperature Code, or T Code as it is commonly referred to, relates to the temperature at which a substance will ignite without a spark or flame. The type of equipment used is depends on the Class, Division, Group, and Temperature Code of the area. Given this information, a manufacturer, such as Killark, can offer the right equipment for the job. Q. I understand the electrical codes are changing to have Zones instead of Divisions. What does this mean.
Zones deal with explosive or flammable gases only.
The chart below identifies how the two compare. The term Zone is used in place of Division to limit confusion and is the same term used in the IEC method. This sounds like a lot of changes. A. No, the move to Zones permits the use of traditional Class and Division equipment. However, the intent in both Canada and the US is that facilities must be re-classified prior to using IEC type equipment in Zone 0 or 1 locations.