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BS 8436 Cable

Jonesy
Hi all I am new to the Forum.


I have a question regarding BS 8436 Compliant Cables. I am aware iof the requirement to protect circuits wired in BS 8436 Cables with "B" Type devices etc due to the requirement to limit fault current in the event of the cable being penetrated by a nail or a screw. However, what if you install the cable clipped direct to the surface and on Cable Tray or basket where the risk of accidental penetration is very low, would it them be acceptable to protect the circuit with "C" Type devices?


I have hunted high and low on the internet for an solution but have failed to find a definitive answer.
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    BS 8436 explicitly states that "protective devices used for the cables covered by this British Standard shall be either a Type B circuit breaker conforming to BS EN 60898 or a Type B RCBO conforming to BS EN 61009-1."  Not exactly any wiggle room there - using a Type C breaker would put the cable outwith its product standard.


    The standard also states that the cables are "intended for installation in air (which includes installation in trunking or other closed systems), and in thin partitions and building voids when connected to a suitably selected protective device...When cables are to be installed in any other environment, reference should be made to the cable manufacturer."  Again, pretty clear - If the manufacturer has data for installation on a tray, fine.


    P
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  • 0
    BS 8436 explicitly states that "protective devices used for the cables covered by this British Standard shall be either a Type B circuit breaker conforming to BS EN 60898 or a Type B RCBO conforming to BS EN 61009-1."  Not exactly any wiggle room there - using a Type C breaker would put the cable outwith its product standard.


    The standard also states that the cables are "intended for installation in air (which includes installation in trunking or other closed systems), and in thin partitions and building voids when connected to a suitably selected protective device...When cables are to be installed in any other environment, reference should be made to the cable manufacturer."  Again, pretty clear - If the manufacturer has data for installation on a tray, fine.


    P
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