Circuit Integrity EN 50200

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Circuit Integrity EN 50200

BS EN 50200: Method of test for resistance to fire of unprotected small cables for use in emergency circuits.

EN 50200 specifies method of test for resistance to fire.

*Mechanical Shock:

The shock producing device shall impact the cable wall after 5min+/-10s from fire activation and subsequently at

5min+/10s intervals. A round steel bar (25+/-0.1) mm in diameter and (600+/-5) mm long shall be used as shock

producing device. The bar is freely pivoted about an axis parallel to the cable wall and 200+/-5 mm away from the

upper edge of the cable wall. Depending on the pass duration time the cables will carry the designation PH XXX, for

instance a PH 120 have passed the duration of 120 min.

There is also an Annex E to EN 50200 which in addition to Fire also has the mechanical impact and water spray. This

above test is followed by a 850 degree flame 15 min with fire and mechanical impact followed by another 15 min with

mechanical impact and water spray.

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