16.2.1 Spaces in which gas
fuel is utilized should be fitted with a mechanical ventilation system
and should be arranged in such a way as to prevent the formation of
dead spaces. Such ventilation should be particularly effective in
the vicinity of electrical equipment and machinery or of other equipment
and machinery which may generate sparks. Such a ventilation system
should be separate from those intended for other spaces.
16.2.2 Gas detectors should
be fitted in these spaces, particularly in the zones where air circulation
is reduced. The gas detection system should comply with the requirements
of chapter 13.
16.2.3 Electrical equipment
located in the double wall pipe or duct specified in 16.3.1 should be of the intrinsically
safe type.