BS6387 Standard

It has been developed to assist installation designers with their assessment of the fire performance characteristics of various types of cables and their selection for specific applications. In particular, it covers the cables' ability to maintain circuit integrity against set time and temperature parameters, under separate conditions involving fire, fire with water spray, and fire with impact.

BS6387 covers fire resistant cables with a voltage rating of 300/500V and 450/750V. It is also an appropriate methodology to test mineral-insulated cables manufactured in accordance with BS6207.

Category	Resistance to fire alone
Category A	650oC for 3 hours
Category B	750oC for 3 hours
Category C	950oC for 3 hours
Category D	950oC for 20 minutes (short duration)

 

Category	Resistance to fire with water (W)
Category C	650oC for 3 hours
Category W	750oC for 3 hours
Category Z	950oC for 3 hours

For example, a cable meeting the requirements in terms of their ability to maintain circuit integrity for 3 hours at 950^oC and also for 3 hours at 650^oC when exposed to fire and water would be referred to as CWZ. (this was originally stated as CWX but was quickly migrated to CWZ, and you rarely see cables with any other classifications). Note that CWZ has been removed as a requirement under BS7629-1 due to the preference for integrated test protocols, but it is often still referenced.

BS6387 Cable Supplier

Eland Cables is a leading supplier of cables designed to maintain circuit integrity under fire conditions, including our standard and enhanced grade cables available direct from stock, and can also support with a range of mineral insulated copper cable manufactured in accordance with BS6387.