For many years, The National Electrical Code (NEC) has provided rules for equipment disconnects. NEC requirements are very specific for motors and motor-driven machinery, but they differ from lockout/tagout rules in NFPA 70E, Standard for Electrical Safety in the Workplace. The reason is simple. The NEC is an installation code, and its requirements apply to installed equipment. The NFPA 70 requirements deal with workplace safety-related rules and practices. Compliance with one code can facilitate compliance with another. Disconnect for controllers
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