FAQ

BS EN 50200 specifies the fire resistance test for unprotected small cables for emergency circuits. It is applicable

to emergency circuit cables with a rated voltage not exceeding 600/1000 V, including cables with a rated voltage

less than 80V, and emergency circuit optical cables. This standard test method is limited to cables with a total

diameter not exceeding 20 mm.

BS EN 50200 fire resistance level is divided into five levels according to the length of continuous fire supply time,

PH15, PH30, PH60, PH90 and PH120. The number behind PH represents the number of minutes of continuous

fire supply. For example, PH 15 means continuous fire supply for 15 minutes. The flame temperature tested by

EN 50200 is 842 degrees. Appendix E is optional, with additional water spray (fire, mechanical impact and water

spray). Unlike BS 6387, EN 50200 tests the same sample and is subjected to the stress of flame, mechanical

impact and water spray at the same time.

A fire protection standard very similar to BS EN 50200 is BS8434-1 and BS8434-2. They have the same

application. BS8434-1 adds water spray to EN50200, with a total test of 30 minutes (15 minutes of flame +

impact, plus 15 minutes of flame + impact + water spray). BS8434-2 can be said to be an enhanced version of

BS EN 50200. Its burning flame temperature is 930 degrees and the test time is 120 minutes (60 minutes of

flame + impact, plus 60 minutes of flame + impact + water spray).