I.S. EN 50102:1997

Introduction
1 Scope
2 Normative references
3 Definitions
  3.1 Enclosure
  3.2 Degree of protection against mechanical impacts
  3.3 IK code
4 Designations
  4.1 Arrangement of the IK code
  4.2 Characteristic group numerals of the IK code and
      their meanings
  4.3 Application of the IK code
  4.4 Marking
5 General requirements for tests
  5.1 Atmospheric conditions for tests
  5.2 Enclosures under test
  5.3 Specifications to be given in the relevant product
      standard
6 Test to verify the protection against mechanical impacts
7 Test apparatus
  7.1 Spring hammer
  7.2 Pendulum hammer
  7.3 Vertical hammer
Annex A (informative) Shapes of striking elements

Deals with the classification of the degrees of protection provided by enclosures against external mechanical impacts when the rated voltage of the protected equipment is not greater than 72.5 kV. Only applies to the enclosures of equipment where the specific standard establishes degrees of protection of the enclosure against mechanical impacts.