3IEEE Std 1100-1999.IEEE Recommended practice for powering and grounding electronic equipment.
4Reinaldo Perez.Handbook of electromagnetic compatibility, Academic Press, 1995.
5IEC60364-5-54 (Ed.2.0,2002-06): Electrical installations of buildings-Part 5-54:Selection and erection of electrical equipment-Earthing arrangements,protective conductors and protective bonding conductors.