CPR Classification: Summary of classes B2, C, D and E

Themain cable cpr rating criterionof the classification of electrical cablesunder the new European CPR從根本上分析兩個方麵:電纜對火災的反應及其危險物質的排放。

The CPR defines several classes that indicate the impact of cables on the spread of fire,using a series of parameters obtained from the corresponding tests.

The CPR includes four classes that apply directly to electrical cables:B2, C, D and E.

These classes refer to combustible cables ranked in order of fire growth rate (FIGRA) and heat release.

CPR classification criteria for of electrical cables

Cables classified as B2 and C are those withmaximum performance against fire,providingmaximum protection to people and equipment.

Cables belonging to classes D and E havea more basic level of safety.

Additional levels of classification

Three additional classification levels have been established; these refer to:

• Theopacity of smoke emitted(s = smoke)
• Thedropletsreleased by the cable in combustion (d = droplets)
• The酸度– or toxicity – of the smoke (a = acidity)

1.Smoke opacity

已建立以下煙霧排放性能標準：

• s1:Little production and slow propagation of smoke
• s1a:S1 with visibility over 80% (UNE-EN 61034-2).
• s1b:S1 with visibility over 60% and below 80% (UNE-EN 61034-2).
• S2：Intermediate values of production and propagation of smoke
• s3:Neither s1 or s2

2. Fall of droplets during combustion

The following performance criteria for droplets / flamed particles have been established:

• d0:No fall of droplets or flamed particles(UNE-EN 50399).
• d1:Fall of droplets and flamed particles that persist for less than 10 seconds(UNE-EN 50399).
• d2:Neither d0 or d1.

3. Smoke acidity

The following performance criteria for acidity have been established:

• a1:Low acidity (UNE-EN 60754-2 conductivity <2,5ms/mm y pH > 4.3)
• a2:Intermediate values of acid (UNE-EN 60754-2 conductivity <10 ms/mm y pH > 4.3)
• a3:Neither a1 or a2

Classes E ca and F ca have no additional classification criteria.

A single european classification

The CPR performance code (reaction to fire class and additional classification) must appear on the cable labelling, together with the other marks.

This new European classification system enables the easy comparison of different products in order to select the most suitable cable for each type of installation.

了解更多信息, you can watch the video that summarises the CPR classes by clicking on this video: