NER - Neutral Earthing Resistor (European) = NGR – Neutral Grounding Resistor (North American)
Based on you location, find which one applies to your drawing and correct accordingly.
- MS
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"All my technical advices in this forum must be consulted with and approved by a local registered professional engineer before implementation" - Mohammed Samad (Linkedin Profile: http://www.linkedin.com/in/msamad)