Lionel PH135's and PH180's were designed to parallel, more power. There was a connecting wire piece that adapted to the modular connector on the transformers. Caution: Common derails, where wheel sets short across the rails can weld and arc to the point of rail and wheel damage. PH135's lower left are connected to the right silver box TPC 400. In command mode, a large off/on switch. TPC 400, conventional mode can vary voltage similar to other handle controlled power supplies. Two TPC 400 shown, one set conventional, the other command.
Fuses upper left in picture distribute power to (8) track circuits from the parallel power source. Fuses are 5 amps per track.
