Early commuter locomotives had only 450 to 550 Kw HEP sets, enough for about 10 single level cars.
Todays commuter locomotives like Genesis, PL42ac, MP36 and MP42 are equipped with 800Kw HEP supply.
The ALP 46 on NJT is even bigger at 1000 Kw or one Mega watt of HEP.
No only one locomotive can supply HEP to a train in USA, in Canada its set up different with a left and right trainline were one locomotive can supply left and other locomotive can supply right.
The Canadian cars have a selector switch to chose between the A (left) and B (right) trainline.
If Conductors are in charge, why are they promoted to be Engineer???
Retired Triebfahrzeugführer. I am not a moderator.