Flame Vs Furnace Tests

The truth about BS6387 and flame vs furnace tests!

The duration and the maximum temperature of a fire in a building depends on several factors including the amount and configuration of available combustibles (including all electric cables), ventilation conditions, properties of the internal enclosures, weather conditions, etc. In common circumstances, the maximum temperature of a fully developed building fire will rarely exceed 1000°C

A flame test like BS6387 (CWZ). Max temperature 860°C (2013 revision)

  • The flame is very small in comparison to a ‘real’ fire
  • Most of heat is lost and not applied directly to cable
  • Too many fixings are often used to keep the cable in place, this is just not practical and would be very expensive!
  • The temperature isn’t even hot enough for the average fire!
  • The new BS50200 is worse at only 842°C and only for 2hrs
  • Only fire rated cables are tested this way

A furnace test like ISO 843-1. Max temperature 1000°C (2014 revision)

  • The closest to a real fire simulation, everything starts to melt!
  • Every other fire rated component in the building must pass a furnace test
    • Fire proof doors
    • Partitions etc
  • Only MICC cables pass this test

Cable Flame Test

Cable Furnace Test

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