Technical and operational regulations § 10a

§ 10a Ignition source control

In order to prevent and protect against ignition of combustible liquids and explosive gases, a systematic mapping of potential electric and non-electric ignition sources shall be performed. In addition, the necessary technical, operational and organisational measures shall be implemented so as to reduce the risk of ignition as far as possible.
Equipment and safety systems in classified areas shall fulfil requirements for use in explosive areas.
Equipment and safety systems that are meant to be operational in abnormal situations, where an explosive atmosphere can exist outside classified areas, shall fulfil requirements to zone 2, minimum, or be placed in protective rooms. Other non-critical equipment that represents an ignition source, shall deactivate automatically on gas detection, but manual deactivation shall also be possible when it is practical to do so from a central or strategic location, in accordance with the facility specific strategy for fire and explosion safety.
Section last changed: 01 January 2015

For the systematic mapping of potential electrical and non-electric sources of ignition as mentioned in the first subsection, the EN 1127-1 standard should be used.
NEK 420A should be used for electrical equipment. For non-electrical equipment, the ISO 80079-36 standard should be used.
Equipment and safety systems shall fulfil the requirements in the Regulations relating to equipment and safety systems for use in explosive areas.
Equipment that represents a potential ignition source in naturally ventilated areas, should deactivate automatically on gas detection anywhere on the facility, unless this implies increased risk. In such cases, the alarm shall be sounded and it must be possible to deactivate manually from a central or strategic location. Equipment placed in protective rooms, should deactivate automatically on gas detection in the room, with the added possibility of manual deactivation.