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220.70 Energy Management Systems (EMS)

Revision/New

Change Summary

  • New section classifies a single value equal to the maximum ampere setpoint of the energy management system shall be permitted to be used in load calculations for the feeder or service.

NEC®Text

Article 220 Branch-Circuit, Feeder, and Service Load Calculations
220.70 Energy Management Systems (EMSs). If an energy management system (EMS) is used to limit the current to a feeder or service in accordance with 750.30, a single value equal to the maximum ampere setpoint of the EMS shall be permitted to be used in load calculations for the feeder or service.
The setpoint value of the EMS shall be considered a continuous load for the purposes of load calculations.

Material taken from the National Electric Code. is reprinted with permission from NFPA 70., 2023 edition. National Electrical Code®, Copyright 2022, National Fire Protection Association, Quincy, MA. All rights reserved.

Expert Analysis

A new section has been added to address the load calculations of energy management systems that is used to limit the current to a feeder or service in accordance with 750.30. When performing the load calculations, a single value equal to the maximum ampere setpoint of the energy management system shall be permitted to be used in load calculations for the feeder or service.

Leviton Solution

The first step when managing energy is to measure it and start a baseline. From there you can continually monitor energy usage to evaluate effectiveness of energy saving measures that you have undertaken. Organizations can monitor, control, and manage energy usage

Figure 1

through submetering strategies, which track energy usage and power consumption for individual tenants, departments, and pieces of equipment or other loads to account for their actual energy usage. From tenant billing to energy measurement & verification (M&V), Verifeye™  offers a seamless solution that enables smart metering and simplifies the complexities of monitoring energy usage, allocating energy costs and billing tenants.

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