BS EN 50576:2022
Electric cables. Extended application of test results for reaction to fire

Standard No.

BS EN 50576:2022

Release Date

2023

Published By

British Standards Institution (BSI)

Latest

BS EN 50576:2022

Scope

This document describes the procedure and rules for extended application of results of tests carried out according to the test methods described in EN 50399, EN 60332-1-2 and EN 61034-2. The EXAP rules described apply to EN 50399 test results used for classification according to EN 13501-6 in classes B2ca, Cca and Dca, additional smoke production classes s1, s2 and s3 and flaming droplets/particles, to results used for classification in classes s1a and s1b. No EXAP procedure and rules have been developed in respect to the results of tests carried out according to the test method described in EN 60754-2. As the parameters (pH and conductivity) for each cable in a family are determined based upon calculation using material test results, this is considered as a matter of direct application. Material test results taken from any one sample of finished cable from a family are sufficient to calculate the parameters for each cable in the family. Cables with a diameter of 5,0 mm or less are expected to be tested as bundles according to EN 50399. Cables with a diameter of less than or equal to 5,0 mm are included in the specific and general EXAP rules for single core unsheathed power cables only. The rules apply to circular and non-circular cables provided that they fall within the scope of the relevant test method. A specific EXAP rule has been developed for any of the types of electric cable families as defined in this document. A general EXAP rule has been developed for all electric cable families unless otherwise stated elsewhere in this document. this document are considered as power cables. For multipair, multitriple and multiquad control cables, either the general The use of the specific EXAP rule gives benefit in the lower number of cables to be tested for a range of cable constructions (product family). An EXAP is only possible when cables belong to a family as defined in this document.

BS EN 50576:2022 Referenced Document

• EN 13501-6 Fire classification of construction products and building elements - Part 6: Classification using data from reaction to fire tests on power, control and communication cables
• EN 50399 Common test methods for cables under fire conditions - Heat release and smoke production measurement on cables during flame spread test - Test apparatus, procedures, results
• EN 60332-1-2 Tests on electric and optical fibre cables under fire conditions - Part 3-21: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category A F/R (Remains Current)
• EN 60754-2 Test on gases evolved during combustion of materials from cables - Part 2: Determination of acidity (by pH measurement) and conductivity
• EN 61034-2 Measurement of smoke density of cables burning under defined conditions Part 2: Test procedure and requirements (Incorporates Amendment A1: 2013)

BS EN 50576:2022 history

• 2023 BS EN 50576:2022 Electric cables. Extended application of test results for reaction to fire