Selection of apparatus according to environmental conditions

When selecting apparatus, special care should be taken to ensure that the apparatus and its components are constructed so as to guard against electrical and mechanical failures in the indeed conditions of use. Two factors to be taken into consideration.

  1. Protection against ingress of solid foreign bodies.
  2. Protection against ingress of liquids.
    Example: - IP54 means that the apparatus is protected against harmful deposits of dust (5) and splash of liquids (4).