NEMA L14-30R vs NEMA 14-50R?

[wml52]

I just purchased a 7500 running watt portable gen-set that has 1 NEMA L14-30R 120/240 30amp receptacle and 1 NEMA 14-50R 120/240 50 amp receptacle and have a question. If you do the math 7500 watts / 240 volts = 31.25 amps. How can the NEMA 14-50R be rated at 120/240 50 amps?

If it can only produce 31.25 amps why use a 50 amp rated receptacle, why not use a 30 amp RV receptacle?

[joestue]

Because the two coils are wound over the top of each other, and on both sides of the rotor, you can pull 50 amps from one coil without burning it out, or 31 amps from both, the heat generated is about same and it is more or less just as evenly spread out in the machine.

50 amps through one produces the same amount of heat as 35 amps through both of them.