Installation (a summary):
Upon installation, the standards and regulations in force
must be observed (harmonized standards, Atex 137). Intrinsically safe
circuits should be separated from non IS circuits. At bare
live connections (terminals) a minimum distance of 50 mm
should be allowed between IS and non IS circuits. Between
IS circuits the distance should be minimum 6 mm. Intrinsically
safe cables and wires should be in light blue colour.