The current that a load takes up comes into it from the live and returns through the neutral. We know that.
We test a live wire by touching it with a tester in one hand and being in contact with the earth. It GLOWS. But I tried to test a loads return current (my computer as the load having input power of 400W at 240V, so the current would be 400/240=1.67 A). I touched the neutral with a tester "A" and was in contact with the live wire through another tester "B" to prevent me from shock, and was completely insulated from earth with a pair of electrically insulated shoes. The "A" didn't glow neither did "B". Why could this be? But in this case when I measured the voltage between tester A and B it was 0V. Maybe that's why. Why could it be 0V ?
I know this question seems useless but I was curious to see the return current.