This standard BS EN 60052:2002 Voltage measurement by means of standard air gaps is classified in these ICS categories:
19.080 Electrical and electronic testing
Applies to the construction and use of sphere-gaps for measuring the peak value of alternating, direct and both full standard and longer tail impulse voltages. Peak values of the disruptive voltages in air are given in tabular form. Note: - For high-voltage test techniques, see IEC 60060.