This document specifies selection criteria for, and describes the design characteristics of, the various electrical- and fluid-circuit penetration components mounted on leaktight or shielded containment enclosures. This document is applicable to: — electrical components, including connectors, fixed or removable wall penetrations, distribution boxes and lighting devices; — fluid components, including fixed or removable wall penetrations, fittings and junctions, and control devices for process or effluent circuits. NOTE The elements constituting the framework of containment enclosures (e.g. metallic walls, framework and transparent panels) are dealt with in ISO 10648- 1