IEC 60364-4-44:2024 PDF

Low-voltage electrical installations - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances

First page of standard IEC 60364-4-44:2024

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Title (English):

IEC 60364-4-44:2024

Low-voltage electrical installations - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 57
Publication date:: December 19, 2024
Edition:: IEC IS 60364 edition 3 version 1
ICS:: 33.100.10

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Description (English):

IEC 60364-4-44:2024 provides requirements for the safety of electrical installations in the event of voltage disturbances and electromagnetic disturbances generated for different specified reasons. The requirements of this document are not intended to apply to systems for distribution of energy to the public, or power generation and transmission for such systems (see the scope of IEC 60364-1) although such disturbances can be conducted into or between electrical installations via these supply systems. This third edition cancels and replaces the second edition published in 2007, Amendment 1:2015 and Amendment 2:2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the structure of the document has been updated in accordance with the ISO/IEC Directives, Part 2:2021: the terms, definitions and symbols have been regrouped under a new Subclause 440.3, the tables and figures have been renumbered; b) Clause 443 has been amended to better introduce the DC SPD and to improve some of the wording.

Technical details

Technical committee: TC 64 - Electrical installations and protection against electric shock
SKU: IEC 60364-4-44:2024

Abstract

Overview

IEC 60364-4-44:2024 - Part 4-44 of the IEC 60364 series - sets requirements for the safety of low-voltage electrical installations against voltage disturbances and electromagnetic disturbances. This third edition (2024) is a technical revision that cancels and replaces the 2007 second edition and subsequent amendments. The document addresses protection measures inside electrical installations (not the public energy distribution or generation systems), including risk assessment, overvoltage control and electromagnetic interference (EMI) mitigation.

Key Topics

Scope & structure: Updated in line with ISO/IEC Directives, Part 2:2021; terms, definitions and symbols regrouped (Subclause 440.3).
Power-frequency overvoltages (Clause 442): Guidance on temporary overvoltages originating from earth faults and conductor faults, and calculation limits for tolerable stress voltages.
Transient overvoltages and SPDs (Clause 443): Risk assessment methods, classification of rated impulse voltages (overvoltage categories) and provisions for Surge Protective Devices (SPDs). Clause 443 has been amended to better introduce DC SPDs and clarify wording.
Electromagnetic influences (Clause 444): Practical measures to mitigate EMI, including sources of interference, earthing and equipotential bonding, segregation of circuits, cable management systems, protective devices and handling of services entering buildings.
Undervoltage protection (Clause 445): Requirements and considerations for preventing operational issues due to undervoltage.
Informative annexes: Examples of risk level calculations for SPD application and guidance for overhead line overvoltage control.

Practical Applications

IEC 60364-4-44:2024 is used to:

Define installation rules to limit damage from lightning, switching transients and conducted disturbances.
Specify when and how to apply Surge Protective Devices (SPDs) including considerations for DC systems.
Design earthing and equipotential bonding networks to reduce EMI and ensure safety.
Plan cable segregation and cable management to limit interference between power and signal circuits.
Conduct risk assessments to justify protective measures and select appropriate overvoltage categories and protective devices.

Who Uses This Standard

Electrical designers and consulting engineers
Installation contractors and site electricians
Facility managers and building services engineers
Surge protection and earthing product manufacturers
Regulatory bodies and inspectors concerned with low-voltage safety and EMI mitigation

Related Standards

IEC 60364-1 (general principles and scope of the 60364 series)
ISO/IEC Directives, Part 2:2021 (document structure and editorial rules)

Keywords: IEC 60364-4-44:2024, low-voltage electrical installations, protection against voltage disturbances, electromagnetic disturbances, SPDs, earthing, equipotential bonding, EMI mitigation, transient overvoltages.

Related standards

Mentioned in the description and other IEC standards

Abstract

Overview

Key Topics

Scope & structure: Updated in line with ISO/IEC Directives, Part 2:2021; terms, definitions and symbols regrouped (Subclause 440.3).
Power-frequency overvoltages (Clause 442): Guidance on temporary overvoltages originating from earth faults and conductor faults, and calculation limits for tolerable stress voltages.
Transient overvoltages and SPDs (Clause 443): Risk assessment methods, classification of rated impulse voltages (overvoltage categories) and provisions for Surge Protective Devices (SPDs). Clause 443 has been amended to better introduce DC SPDs and clarify wording.
Electromagnetic influences (Clause 444): Practical measures to mitigate EMI, including sources of interference, earthing and equipotential bonding, segregation of circuits, cable management systems, protective devices and handling of services entering buildings.
Undervoltage protection (Clause 445): Requirements and considerations for preventing operational issues due to undervoltage.
Informative annexes: Examples of risk level calculations for SPD application and guidance for overhead line overvoltage control.

Practical Applications

IEC 60364-4-44:2024 is used to:

Define installation rules to limit damage from lightning, switching transients and conducted disturbances.
Specify when and how to apply Surge Protective Devices (SPDs) including considerations for DC systems.
Design earthing and equipotential bonding networks to reduce EMI and ensure safety.
Plan cable segregation and cable management to limit interference between power and signal circuits.
Conduct risk assessments to justify protective measures and select appropriate overvoltage categories and protective devices.

Who Uses This Standard

Electrical designers and consulting engineers
Installation contractors and site electricians
Facility managers and building services engineers
Surge protection and earthing product manufacturers
Regulatory bodies and inspectors concerned with low-voltage safety and EMI mitigation

Related Standards

IEC 60364-1 (general principles and scope of the 60364 series)
ISO/IEC Directives, Part 2:2021 (document structure and editorial rules)

IEC 60364-4-44:2024 PDF

Technical details

Abstract

Overview

Key Topics

Practical Applications

Who Uses This Standard

Related Standards

Related standards

Abstract

Overview

Key Topics

Practical Applications

Who Uses This Standard

Related Standards

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