1DV.1 DR Modification of the Clause 1 to replace with the following:
1DV.1.1 This part of IEC 60079 standard gives requirements for the design, construction,assessment, verification and marking of rooms used to protect internal equipment:
– located in a Zone 1 or Zone 2 or Zone 21 or Zone 22 explosive atmosphere (an area normally requiring an equipment protection level (EPL) Gb, Gc, Db or Dc) without an internal source of gas/vapour release and protected by pressurization;
