1. ANSI/IEEE Std 80-1986 (1986) IEEE guide for safety in AC substation grounding. The Institute of Electrical and Electronics Engineers. Inc., New York, USA
2. IEEE Std 80-2000 (2000) IEEE guide for safety in AC substation grounding. The Institute of Electrical and Electronics Engineers. Inc., New York, USA
3. IEEE Std 80-2013/Cor 1-2015 (2015) IEEE guide for safety in AC substation grounding. The Institute of Electrical and Electronics Engineers. Inc., New York
4. CENELEC EN 50522: 2010, Earthing of power installations exceeding 1kV (2010). European committee for electrotechnical standardization, Brussels, Belgium
5. BS EN 5022: 2010, Corr. 2012, Earthing of power installations exceeding 1kV (2012). British Standards Institution, BSI Standard Limited, London, UK