I have known for some time that when buying IEC320-C14 to IEC320-C13 jumper cords that some are supplied manufactured from 0.75mmsq cable 6A rated even though the connectors are rated at 10A. How is this permitted?
It is rarely made obvious that the cable is rated to 6A and in some cases states 10A rated connectors with 0.75mmsq cable.
I note that in a lot of cases cables <=2M in length are made from 0.75mmsq cable but over 2M are 1.0mmsq (10A rated).
I can see that in a lot of cases that the type of equipment that these are connected to would never take 10A, but this is not guaranteed and does not seem safe to me.
Take this as an example:-
Single phase 3KVA UPS fed with power from a 16A IEC309 (Commando style) to an IEC320-C19 lead. This is fine.
The UPS output has 8x IEC320-C14 connectors in two banks of 4, each bank protected with a 10A device.
The load is a pretty hefty piece of IT equipment which can pull a peak of about 2.2KVA (9.5A), but it is being fed with a 2M IEC320-C14 to C13 cable with 0.75mm cable (6A rated).
What are your thoughts on this?