521.10.202 Wiring systems shall be supported such that they will not be liable to premature collapse in the event of a fire.
NOTE 1: Wiring systems hanging across access or egress routes may hinder evacuation and firefighting activities.
NOTE 2: Cables installed in or on steel cable containment systems are deemed to meet the requirements of this regulation.
NOTE 3: This regulation precludes, for example, the use of non-metallic cable clips or cable ties as the sole means of support where cables are clipped direct to exposed surfaces or suspended under cable tray, and the use of non-metallic cable trunking as the sole means of support of the cables therein.
NOTE 4: Suitably spaced steel or copper clips, saddles or ties are examples that will meet the requirements of this regulation.