Class / Division classification
Classification, protection concept and certificate conditions
- Class / Division classificationThis term
Class identifies the type of hazard and Division describes its presence conditions. Do not replace an engineered classification with a direct Zone conversion.
- Explosion-protected equipment
Equipment uses one or more recognized protection concepts. The actual marking and assessment control which concepts and conditions apply.
- Special conditions of use
X points to specific conditions of use; U identifies an Ex component certificate. Obtain the relevant conditions or schedule of limitations.
- Ignition source
Sufficient energy or temperature can ignite the relevant atmosphere. Include nonelectrical sources in the applicable ignition-risk assessment.
A location classification describes the hazard. An equipment protection concept describes a means of protection, while certificate conditions define how the particular item may be used.
Conceptual relationships and isolated suffix letters. This is not an approval workflow, a location classification or a conversion table between Class/Division and Zones.