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RESIDENTIAL/INDUSTRIAL/COMMERCIAL
The disconnecting requirements for generators are now more stringent.
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New wording in Sec. 445.18 requires that you install a disconnecting means that is capable of being locked in the open position to improve safety for those working on the generator or its connected equipment, except where
- The driving means for the generator can be readily shut down and
- The generator is not arranged to operate in parallel with another generator or other source of voltage.
Be careful here: If you're using a single generator to supply emergency power as well as legally required or optional standby power, then you must install two transfer switches: one for emergency power and another for legally required and optional standby power.
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