Neutral Earthing Resistors (NER) is by far the most effective and preferred method. It solves the problem of transient overvoltages, thereby reducing equipment damage. Neutral Earthing Resistors (NER) • Reduced magnitude of transient overvoltages. • Simplified ground fault location. • Improved system and equipment fault protection. • Reduced maintenance time and expense. • Greater safety for personnel. • Improved lightning protection. • Reduction in frequency of faults.