Why is the CPR classification critical when selecting cables for an electrical installation upgrade?

The CPR classification, defined in EU Regulation (EU) No 305/2011, establishes a common framework for assessing the reaction to fire of construction products, including electrical cables. It introduces Euroclasses from Aca (non-combustible) to Fca (no performance determined), evaluating heat release, flame spread, smoke opacity and acidity, and flaming droplets. Using cables with a higher CPR class (e.g., Cca-s1,d1,a1) directly reduces the risk of fire propagation through cable routes in buildings, giving occupants more time to evacuate and limiting property damage, which is why many national wiring codes now mandate minimum CPR levels.