Cluase 3.9.9.3 (a) (ii) Penetration of Fire Barriers

3.9.9.3 Penetration of Fire Barriers
(a) Where a wiring system passes through elements of building construction, such as floors, walls, roofs, ceilings, partitions or cavity barriers that are required to be fire-rated-

(ii) the cross-sectional area of the opening shall not be greater than 500 sqr mm, i.e. if circular, 25 mm diameter; and

Exception: The cross-sectional area of the opening may be increased up to a maximum of 2000 sqr mm (50 mm in diameter) for a single cable that leaves a gap of not more than 15 mm between the cable and the opening.

Standards Australia have been made aware of the limitations of this clause regarding rising mains in multi level buildings etc.

Regards
SA Spark