Hi
I was wondering if someone could check my understanding of the current capacity of a PVC insulated Twin + Earth 6 sq.mm cable which we have installed.
The cable has been clipped direct to the timber frame and has mineral wool insulation placed to the side of it.
It is not grouped with other cables and I do not expect the ambient temperature around the cable to exceed 30 deg C.
The cable is run direct from the CU and is protected with a 32A Type B MCB.
The cable supplies an induction hob only. We powered up the hob turning up all the rings to full power and using a clamp meter ( around the live wire at the CU ) measured that the maximum current drawn was 34A.
The 32A MCB did not trip after waiting for several minutes - is this normal ?
Based on Table 4D5A Installation Method 15 that the cable will be capable of conducting 35A.
To be honest I never expect all the hob rings to be switched on to maximum at the same time. I just wanted to see just how much current would be drawn in the worst case ?
Is there anything to worry about ?
I was wondering if someone could check my understanding of the current capacity of a PVC insulated Twin + Earth 6 sq.mm cable which we have installed.
The cable has been clipped direct to the timber frame and has mineral wool insulation placed to the side of it.
It is not grouped with other cables and I do not expect the ambient temperature around the cable to exceed 30 deg C.
The cable is run direct from the CU and is protected with a 32A Type B MCB.
The cable supplies an induction hob only. We powered up the hob turning up all the rings to full power and using a clamp meter ( around the live wire at the CU ) measured that the maximum current drawn was 34A.
The 32A MCB did not trip after waiting for several minutes - is this normal ?
Based on Table 4D5A Installation Method 15 that the cable will be capable of conducting 35A.
To be honest I never expect all the hob rings to be switched on to maximum at the same time. I just wanted to see just how much current would be drawn in the worst case ?
Is there anything to worry about ?