The facilities 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. For permanently placed facilities, equipment and safety systems in all areas where explosive atmospheres can be formed, shall be selected on the basis of the categories stipulated in Regulations relating to equipment and protective systems intended for use in potentially explosive areas (in Norwegian only), Annex I.
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 2021

In order to fulfil the requirements to ignition source control as mentioned in the first subsection, the standards ISO 13702 chapter 8 and NORSOK S-001 chapter 15 should be used.
For the systematic mapping of potential electrical and non-electric ignition sources as mentioned in the first subsection, the EN 1127-1 standard should be used. For electrical equipment, the IEC 61892 series should be used. For non-electrical equipment, the ISO 80079-36 standard should be used.
On permanently placed facilities, equipment and safety systems in classified areas and in naturally ventilated areas on an open deck shall fulfil the requirements in the Regulations relating to equipment and safety systems for use in explosive areas, cf. Regulations relating to equipment and safety systems for use in explosive areas (in Norwegian only).
Areas where explosive atmospheres can be formed as mentioned in the second subsection, also apply to naturally ventilated areas on open decks. As regards mobile facilities, reference is made to IMO MODU Code chapter 6.6 for electrical equipment and chapter 6.7.2 for non-electrical (mechanical) equipment.
Equipment that represents a potential ignition source in naturally ventilated areas on an open deck, 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 detection of gas in the room, with the added possibility of manual deactivation.