Document: NUREG-0800
Document ID: 899b3059-69f1-4f7b-bead-1d58e5f4870f
Document Type: srp
Title: Revision 5 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550080.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
ected to Low-Voltage (1000 V and Less) AC Power Circuits,” provides acceptable guidance for overvoltage testing of equipment connected to low-voltage AC power circuits. IEEE Std C62.23-1995 (R2001), “IEEE Application Guide for Surge Protection of Electric Generating Plants,” describes electric utility industry practices, accepted theories, existing standards/guides, definitions, and technical references as they pertain specifically to surge protection of electric power generating plants. IEEE Std C62.36-2000, “IEEE Standard Test Methods for Surge Protectors Used in Low Voltage Data, Communications, and Signaling Circuits,” provides guidance for test methods for surge protectors used in low voltage data, communications, and signaling circuits. This guidance is acceptable when credit is taken for surge protection in these types of circuits. ANSI Std C84.1-1989, “American National Standard for Electric Power Systems and Equipment — Voltage Ratings (60 Hz),” discusses nominal voltages and guidelines for steady-state tolerances. 1IEEE Std 384-1992 defines a maximum credible voltage or current transient as voltage or current transient that may exist in circuits, as determined by test or analysis, taking into consideration the circuit location, routing, and interconnections combined with failures that the circuit may credibly experience. 2 While fiber optic cables are not specifically isolation devices, they do provide an inherent electrical isolation capability. Since the fiber does not provide a conductive path and the separation distance associated with the cable run mitigates the potential for arcing, the isolation provided by fiber optic cable should be credited. BTP 7-11-4 Revision 5 - March 2007 Regulatory Guide 1.204, “Guidelines for Lightning Protection of Nuclear Power Plants,” provides guidance for design and installation of lightning protection systems to ensure that electrical transients resulting from lightning phenomena do not render