IEC 60364-8-81 ED1

Low-voltage electrical installations - Part 8-81: Functional aspects - Energy efficiency

Scope

IEC 60364-8-81:2026 (E) provides additional requirements, measures and recommendations for the design, erection, operation and verification of all types of low-voltage electrical installation including local production and storage of energy for optimizing the overall efficient use of electricity.
It introduces requirements, recommendations and methods for the design and the energy efficiency (EE) assessment of an electrical installation within the framework of an energy efficiency management approach in order to get the best permanent functionally equivalent service for the lowest electrical energy consumption and the optimal availability and acceptable cost-effectiveness.
These requirements, recommendations and methods apply, within the scope of the IEC 60364 series, for new installations and modification of existing installations.
This document is applicable to the electrical installation of a building or system and does not apply to products. The energy efficiency of products and their operational requirements are covered by the relevant product standards.
It is possible that another standard provides specific requirements for a particular system or installation application (e.g. manufacturing system covered by ISO 20140 series).
This document does not specifically provide requirements for building automation systems. The contribution of building automation systems to improve energy efficiency of the installation is considered.
This group energy efficiency publication is primarily intended to be used as an energy efficiency standard for the low-voltage electrical installations mentioned in the scope, but is also intended to be used by technical committees in the preparation of publications, in accordance with the principles laid down in IEC Guide 118

This first edition cancels and replaces the second edition of IEC 60364-8-1 published in 2019. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) modified numbering that allows IEC 60364-7 subparts to amend this document;
b) alignment of the definitions with IEC 60050-826;
c) introduction of minimum energy moment method in Annex A;
d) improvements in Annex B