Often, in order to reduce costs, manufacturers of cable and wire products reduce the cross-sectional area of current conducting conductor.
The cost of aluminium or copper makes up a large part of the cost of the cable and wiring products. In this regard, the manufacturer can reduce the cross-section of the current conducting conductor or make it from insufficient quality, purified copper.
‼The desire to save money is not always justified and, in this case, can lead to negative consequences such as:
P.S You can’t reduce the cross-section even when you really want to. You can’t buy a cheap cable, even if you really want to.