Australian Fire Rated WS52W Cables
When a cable type is assigned a wiring system code it means that a cable, representative of its group as defined by AS/NZS 3013, has satisfied the test criteria for that rating.
In order to understand what a WS rating means, reference to section 3 of AS/NZS 3013 is recommended, however the table below gives a brief overview of how the WS ratings relate to the electrical and mechanical performance of fire rated cables and elements in both normal service and fire conditions.
|Number||Level of circuit integrity in fire condition||Number||Level of protection against mechanical damage||Water spray test applied|
|Characteristic lettering “WS”||1||15 min||1||Light||The letter “W” shall be applied as appropriate|
|4||90 min||4||Very heavy|
|5||120 min||5||Extremely heavy|
As an example a WS52W rated cable will have the following characteristics;
- WS – be suitable for inclusion in a wiring system
- 5 – have electrical performance (circuit integrity) for 120 minutes (two hours) in a fire condition
- 2 – provide a moderate level of protection against impact damage during normal service
- W – have electrical performance (circuit integrity) following exposure to water from overhead sprinklers