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

AFNOR Editions has published a pack of 21 standards updating the rules governing low-voltage electrical installations, an industry bestseller for building professionals.

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Published on 13/09/2024, updated 25/10/2024 à 08:47 Reading time : 4 minutes
Un multimètre, une pince et des plans

It’s a bestseller in the world of building and electro-technology! The bible of electricians, the NF C15-100 standard has been reissued by AFNOR Editions in a new version, with parts numbered 1, 7, 8, 10 and 11. This collection of texts, which provides rules for the design, construction, verification and maintenance of low-voltage electrical installations, dates back to 2002, and had been amended five times. These remain valid until August 2025. It was time to revise the whole thing, to take account of technological developments, changes linked to new usage patterns and, on a European and international scale, developments in CENELEC and IEC harmonization documents, always with the aim of ensuring the safety of people, animals and property. This has now been achieved, under the aegis of the AFNOR U15 commission, which includes some forty professional bodies. ”

The form of the standard has changed, to make it easier to revise, without waiting twenty-two years! Each title in the 7 series can be revised independently of 15-100-1, which groups titles 1 to 6, and remains the foundation of the standard. Title 10 of 2016, which concerns housing, remains unchanged. “explains Bernard Gioan, Managing Director of Le Confort Electrique, one of the players represented on the standardization committee as a member of the French Federation of Electrical Integrators (FFIE).”

Rules for charging electric vehicles from a building

Many changes have been made compared with the previous corpus. Greater emphasis has been placed on writing and comprehension, with figures and definitions (headings 1 to 3). New topics have been introduced into the series: energy efficiency, electric vehicle power supply systems, extra-low voltage lighting, etc. For example, with regard to electric vehicles charging from a building, NF C15-100-7-722 specifies that a dedicated circuit is required to supply the socket dedicated to recharging or the charging point. The use of shutters for normal charging has been confirmed. “Bernard Gioan adds: “New requirements on modifying installation methods and taking harmonics into account, imply changes in methods for calculating cable cross-sections. With the exception of residential buildings, the risk assessment method for lightning arresters has changed. ” The standard confirms a trend that began in 2016 to reinforce fire protection and the fight against 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 “, Bernard Gioan sums up. Ultimately, depending on whether the regulations make these rules mandatory, installers will have to be prepared to change their habits when using cables. Here are the new texts available in the AFNOR collection, dated August 2024:

  • NF C15-100-1 “Low-voltage electrical installations – Part 1: General requirements”.
  • NF C15-100-7-701 “Special rules for rooms or areas containing a bath or shower”.
  • NF C15-100-7-702 “Special rules for swimming pools and other basins”.
  • NF C15-100-7-703 “Special rules for premises containing sauna heaters”.
  • NF C15-100-7-704 “Règles particulières pour les installations de chantier” (Special rules for building site installations)
  • NF C15-100-7-705 “Special rules for agricultural establishments”.
  • NF C15-100-7-706 “Special rules for confined conductive enclosures”.
  • NF C15-100-7-708 “Special rules for electrical installations in caravan parks”.
  • NF C15-100-7-709 “Special rules for harbours, marinas and similar sites”.
  • NF C15-100-7-711 “Particular rules for temporary installations of structures, huts and stands in fairgrounds, markets, amusement parks, circuses and exhibition or show sites”.
  • NF C15-100-7-715 “Particular rules for very low voltage lighting installations”.
  • NF C15-100-7-717 “Special rules for mobile or transportable units”.
  • NF C15-100-7-722 “Special rules for powering electric vehicles”.
  • NF C15-100-7-729 “Particular rules for electrical service rooms or locations”.
  • NF C15-100-7-752 “Special rules for liquid fuel dispensing areas”.
  • NF C15-100-7-753 “Particular rules for heating cables and heating systems”.
  • NF C15-100-7-756 “Special rules for parking lots”.
  • NF C15-100-7-773 “Special rules for the protection of unsupervised installations”.
  • NF C15-100-8-1 “Efficacité énergétique” (Energy efficiency)
  • NF C15-100-10 “Special rules for residential buildings”.
  • NF C15-100-11 “Special rules for communication network installations in residential buildings”.