Jan 18, 2008-ROSSLYN VA: The National Electrical Manufacturers Association (NEMA) has published Application Guide for Isolated Ground Wiring Devices, which was produced by the NEMA Wiring Device Section. This publication covers wiring devices and accessories intended to help protect sensitive equipment from malfunction due to noise on the equipment grounding path. Devices include receptacles, single or duplex with straight blade or locking NEMA configurations, rated 15 A to 60 A and 125 V to 600 V. Accessories include color-coded mating plugs and wall plates to identify isolated ground receptacles.
In addition to indicating devices and accessories available for isolated ground installations, this guide covers National Electrical Code requirements, applications for isolated ground circuits, and trouble shooting and maintenance of such installations. It does not consider analysis of noise currents on the grounding system of power supply circuits or their effects on sensitive electronic equipment.
An electronic copy of NEMA Application Guide for Isolated Ground Wiring Devices may be downloaded at no charge by visiting NEMA's website.