Fuse upgrade for P12

[John_H]

Found some information on the HC duplex outputs, which may be off-topic, but nevertheless interesting

P20 protection mode

The Power Plant distinguishes the two events through the use of NTC thermisters to limit inrush current. When cold, an NTC thermistor exhibits significant resistance, limiting current. As it warms its resistance decreases. Thus, current limiting is active only upon initial power-up.