Apple power supply consists of a very thick, inflexible AC cable (wall outlet to converter) and a very thin, flexible DC cable (converter to computer):
Why? The currents through the cables should be comparable, right?
EDIT: the label on the converter says:
- input: 110-240V ~ 1.5A 50-60Hz
- output: 16.5V = 3.65A max
EDIT2: cf. ThinkPad power adaptor (typical cables, similar to hp/dell &c)
Which has a thicker (than Apple) DC part and thinner (than Apple) AC part and is rated
- input: 100-240V ~1.5A 50/60Hz
- output: 20V =3.25A
The characteristics seem to be similar - why are the cables so dissimilar in the ratio
DC cable thickness /
AC cable thickness?
EDIT3: cf. AC Adapter For System76 Pangolin (which has 3 wires - including earth - in the AC part)
It is rated similar to the above and has a thicker DC part and thinner AC part than the Apple cable.
EDIT4: Looks like Lenovo/ThinkPad cables are under-engineered, which explains the cable thickness discrepancy observed!