IEC 60364-8-81:2026 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.

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