Utility customers adding load or expanding operations must comply with the NEC, including the load planning in NEC 220.87. The minimum data requirements and recording methods are given here, along with recommendations for additional data that may be useful for the utility in conjunction with additional customer load.
The basic NEC requirement is maximum demand current over 30 days. Data on transformer loading, voltage regulation, and harmonic levels are also important for the utility. The recording setup and data analysis methods shown here enable the utility to fully characterize a customer’s loads to facilitate the expansion planning for both parties.
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