Power Supply Rails

If a PC power supply has one 12v rail but it is split into 4 sub rails for the purpose of current limiting on each sub rail, can the sub rails be mixed (using say a 12+ volt wire from two different sub rails to power a single device)

by JimmyAz
August 20, 2021

Putting dc sources in parallel, directly, can raise problems: assume the voltage is not exactly the same from two of the sources at their junction, which would create a loop with a (light) difference of voltage but also with almost no resistance.

by vanderghast
August 21, 2021

Note that the difference in voltage could come from the wiring of different length, or from a ridiculously small internal or extrenal resistance.

by vanderghast
August 21, 2021

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