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This standard is applicable to the erection and operation of fixed and temporary electrical test installations. Compliance with this standard is not necessary, if contact with live parts presents no danger. This is the case when one of the following conditions is satisfied at live exposed points: a) The voltage at frequencies above 500 Hz does not exceed 25 V a.c. or 60 V d.c. and complies with the requirements for SELV or for PELV in accordance with HD 384.4.41. b) In case of voltages at frequencies up to 500 Hz exceeding 25 V a.c.or 60 V d.c., the resultant current through a non-inductive resistance of 2 kW does not exceed 3 mA a.c. (r.m.s.). or 12 mA d.c. c) At frequencies above 500 Hz no hazardous body currents or contact voltages occur. In these cases the national determined current and voltage values should be applied. If there are no national requirements determined reference values for permissible body currents and contact voltages can be taken from Table A.1 in Annex A. d) The discharge energy does not exceed 350 mJ.