Once the determination of the explosive atmosphere
has been established it is then necessary to considerwhether there is a presence of an ignition source which
will precipitate an explosion; such ignition sources
could be:
➤ Hot surfaces
➤ Naked fl ames and other hot gases
➤ Mechanically generated sparks
➤ Electrical equipment
➤ Static electricity
➤ Lightning
➤ Radio frequency (RF) – electromagnetic waves
➤ Ionising radiation.