Perhaps, the answer lies in this (in)famous
ETCP question, disclosed and discussed in a
PLSN article by Richard Cadena:
Which of the following currents would flow in an extension cord connecting a luminaire with a 575w 115v incandescent lamp to a receptacle providing 120v?
1) 4.8 a
2) 5.0 a
3) 5.2 a
4) 6.2 a