FTT - Circuit Integrity Under Fire Conditions Apparatus
Fire Resistance

    BS 6387

    Manufacturer: FTT
    Country of Origin: UK
    Standards:
    Use:
    Tests cable circuit integrity under fire conditions.


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Description

FTT
 produce the BS 6387 test apparatus required for testing cable circuit integrity under fire conditions.


The apparatus is supplied with ability to assess:

  • Resistance to Fire Alone (IEC 60331-11 / BS 6387 Protocol C)
  • Resistance to Fire with Water (BS 6387 Protocol W)
  • Resistance to Fire with Mechanical Shock (BS 6387 Protocol Z)

1. Resistance to Fire Alone Testing (as prescribed in BS 6387 Protocol C; IEC60331-11)
The cable in question is mounted horizontally into a chamber, constructed of Zintec, with up to 5 ring clamps. It is then exposed to a 610mm long tube-type gas burner. Electrical continuity is checked throughout a 3 hour exposure to the gas burner set at an appropriate temperature.

2. Resistance to Fire with Water (BS 6387 Protocol W)
The cable is held with a metal support and the assembly is housed in an electrically earthed test frame which is held in a large, watertight, Stainless Steel trough. The frame is also fitted with a gas burner, a water sprinkler head and means to power and test the continuity of the cables. A 500mm section of the cable in question is exposed to flames at 650°C for a period of 15 minutes. The water spray is then switched on, in order to comply with the standard BS 6387 (Protocol W), the cable must maintain electrical integrity whilst both water and flames impinge on the cable for a further 15 minutes.

3. Resistance to Fire with Mechanical Shock (BS 6387 Protocol Z; IEC60331-11; BS EN 50200)
The cable is mounted on a vertical board made from non combustible material (900mm × 300mm × 9mm). This vertical board is mounted onto rubber bushes such that it will resist shock from a bar which is driven to fall on to the top edge of the board every 30 seconds. The powered cable must maintain electrical continuity during a 15 minutes exposure to flames from a burner and impact from the falling bar.
 




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