Voltage Readings

[Scott Forman]

I don't know a lot about electricity, so I need some help here:

What should the voltage reading on the engine volt gauge be while
driving? I have always thought that when driving normally, the volt
gauge should read somewhere around 14.5 when the alternator is
putting out properly. Last night, when driving home from a repair
shop where several items were replaced (including 4 new batteries),
the gauge was only reading a bit above 12 when driving. Should I be
concerned about my alternator?

Also...what is the purpose of the 'Amps' gauges? What do they
demonstrate? My 82 FC has one on the dash and also one at the power
switch in the step well. Neither gauge ever seems to move much if at
all. What should these two gauges be showing me?

Thanks
Scott Forman
82 FC35RB
Memphis