Low-voltage electrical installations: the NF C15-100 series has been published

Why a new NF C15-100 electrical standard?

The NF C15-100 standard is a must-have in the world of construction and electrical engineering! A veritable bible for electricians, a new edition is being released in Download as PDF and a new structure at AFNOR Editions (creating sections numbered 1, 7, 8, 10, and 11). 
This collection of official documents, which sets forth the rules for the design, installation, inspection, and maintenance of low-voltage electrical systems, was originally published in 2002 and has been amended five times. These amendments remain in effect until August 2025.
It was time to review everything to take into account:

• Technological developments
• Changes related to new patterns of use
• Developments in CENELEC and IEC harmonization documents at the European and international levels.

This update was necessary to ensure the continued safety of people, animals, and property. It has now been completed under the auspices of the AFNOR U15 committee, which includes some forty professional organizations. You can therefore find the  the official text of each of the 21 sections of the NF C15-100 standard on the website of AFNOR Publishing .

The structure of the standard has evolved to make it easier to revise without having to wait twenty-two years! Each title in Series 7 can now be revised independently of 15-100-1, which covers Titles 1 through 6; the series remains the foundation of the standard. “Title 10 from 2016, which concerns residential buildings, remains unchanged,” explains Bernard Gioan, manager of Le Confort Electrique, one of the stakeholders represented on the standards committee as a member of the French Federation of Electrical Integrators (FFIE). 
 

Home Electrical Standards: What Has Changed?

There have been many changes since the previous corpus:

• Efforts have been made to improve clarity and readability through the use of figures and definitions (Sections 1 through 3)
• New topics have been added to the series: energy efficiency, charging infrastructure for electric vehicles, ultra-low-voltage lighting, and more.

NF C15-100 Standard for Charging Stations: What Are the Rules?

One example that clearly illustrates these new requirements is the charging of electric vehicles in commercial buildings. Section NF C15-100-7-722, which you can Download as a PDF:  

• Specifies that a dedicated circuit is required to power the charging outlet or charging station
• It has been decided to keep the shutters in their normal position.

New requirements regarding changes to installation methods and the consideration of harmonics necessitate changes to the methods used to calculate cable cross-sections , adds Bernard Gioan.
With the exception of residential buildings, the method for assessing fire risks in the installation of surge protectors is changing. “The NF C15-100 standard confirms a trend, which began in 2016, toward strengthening fire protection and combating the spread of fire and smoke, by taking into account the Euroclasses of reaction to fire for insulated conductors and cables defined in the Construction Products Regulation,” summarizes Bernard Gioan. 
Effective September 2025, the NF C15-100 series will become the standard for new installations and for extensions or modifications to existing installations, as well as for those parts of existing installations affected by such extensions or modifications. However, as of now, the 2024 version of the standards is not referenced in the regulations. This means that the 2002 version of the standards, and any amendments thereto, remain in effect and continue to be mandatory standards within the meaning of the decree of August 3, 2016.

To fully understand and apply the standards of the NF C15-100 series (2024 edition), AFNOR Editions offers the book *Electrical Installations in Residential Buildings: NF C15-100 Made Simple* (March 2026). Buy it here !

How do I download the NF C15-100 standard (official text)?

On our website, you can download the standard NF C15-100 in PDF. All new official documents, dated August 2024, are available in the AFNOR collection:

• NF C15-100-1 “Low-voltage electrical installations – Part 1: General requirements”
• NF C15-100-7-701 “Specific requirements for rooms or areas containing a bathtub or shower”
• NF C15-100-7-702 “Specific Rules for Swimming Pools and Other Pools”
• NF C15-100-7-703 “Specific Rules for Rooms Containing Sauna Heaters”
• NF C15-100-7-704 “Specific Rules for Construction Site Installations”
• NF C15-100-7-705 “Specific Rules for Agricultural Establishments”
• NF C15-100-7-706 “Special Rules for Confined Conductive Enclosures”
• NF C15-100-7-708 “Specific Rules for Electrical Installations in Caravan Parks”
• NF C15-100-7-709 “Specific Rules for Ports, Marinas, and Similar Facilities”
• NF C15-100-7-711 “Specific Rules for Temporary Structures, Tents, and Stands at Fairgrounds, Markets, Amusement Parks, Circuses, and Exhibition or Performance Venues”
• NF C15-100-7-715 “Specific Rules for Extra-Low-Voltage Lighting Installations”
• NF C15-100-7-717 “Specific Rules for Mobile or Transportable Units”
• NF C15-100-7-722 “Specific Rules for the Power Supply of Electric Vehicles”
• NF C15-100-7-729 “Specific Rules for Electrical Service Rooms or Locations”
• NF C15-100-7-752 “Specific Rules for Liquid Fuel Dispensing Areas”
• NF C15-100-7-753 “Specific requirements for heating cables and heating systems”
• NF C15-100-7-756 “Specific Rules for Parking Lots”
• NF C15-100-7-773 “Specific Rules for the Protection of Unattended Installations”
• NF C15-100-8-1 "Energy Efficiency"
• NF C15-100-10 “Specific Rules for Residential Buildings”
• NF C15-100-11 “Specific Rules for the Installation of Communication Networks in Residential Buildings”