IS 12233 Pt.1/Sec.4-1987 Electromagnetic interference characteristics of overhead power lines and high-voltage equipment Part 1 Phenomenon description Section 4: Sparks caused by poor contact
1.1 This standard ( Part 1 / Sec 4 ) deals with radio noise generated by sparking due to bad contacts, which may cause interference to radio/TV reception.
1.2 The frequency range concerned is 0.15 to 300 MHz.