using a 30 amp splitter

Roadpilot wrote:
It's not something you could rely on. If you had a 50 amp load going to the two 30 amp outlets wired in parallel, the resistances on the two legs would have to be matched perfectly, otherwise the current would tend to be drawn from the oe with the least total resistance. That would trip the breaker and when that breaker goes the second would also go as the load would shift to it.

It's similar to having to power supplies load share when in parallel. They won't unless you add some resistance (like or'ing diodes).

While what you said is correct that is not how the Cheater Cord works. It does not connect the 2 hot leads together but rather a 50A rig can draw up to 30A from either hot wire which are protected by independent 30A CBs. Resistance is not a factor.

The Cheater Cord does parallel the 2 neutrals in the adapter and the draw on each does involve resistance/impedance and there are no CBs on the neutrals to trip.