Where creepage and clearance distances affect the intrinsic safety of the apparatus, the printed circuit
shall conform to the following (see Figure 5):
a) when a printed circuit is covered by a conformal coating according to 6.4.8, the requirements of 6.4.3
and 6.4.7 shall apply only to any conductive parts which lie outside the coating, including, for example
- tracks which emerge from the coating,
- the free surface of a printed circuit which is coated on one side only,
- bare parts of components able to protrude through the coating;
b) the requirements of 6.4.8 shall apply to circuits or parts of circuits and their fixed components when
the coating covers the connecting pins, solder joints and the conductive parts of any components.