I am looking at a multicore cable for remote switching of a machine. The supply to the machine is fused at 5A (240v).
The cable to the control panel 16 cores, each of 0.25mm², going to various devices in an adjacent room. The cable is max 5m long.
Switching should be intermittent, across various pairs, but I have to consider that in the event of a fault, it might carry current for an extended period. It is improbable that any core would carry more than about 2A, but I am considering that in the event of a fault it might carry 5A (being the capacity of the fuse for the whole machine) on a pair of cores for an extended period.
How do I verify that the cable is adequate for the current? Bunching does not really apply because if one pair is carrying 5A, none of the others will carry anything.
The cable to the control panel 16 cores, each of 0.25mm², going to various devices in an adjacent room. The cable is max 5m long.
Switching should be intermittent, across various pairs, but I have to consider that in the event of a fault, it might carry current for an extended period. It is improbable that any core would carry more than about 2A, but I am considering that in the event of a fault it might carry 5A (being the capacity of the fuse for the whole machine) on a pair of cores for an extended period.
How do I verify that the cable is adequate for the current? Bunching does not really apply because if one pair is carrying 5A, none of the others will carry anything.