Understanding the use of fusesm Di Matteo

[FERDINANDO DI MATTEO <aroctek@domain.elided>]

Few know what fuses are really used for or why different values are 
needed.   It is quite simple.  Fuses protect the wires that carry 
current to each device, lights, motors, relays, heaters etc.  nothing 
else!   All wiring diagrams show wire size for each circuit.  The 
engineers that design electrical systems know how much current each 
circuit carries so a particular minimum size is depended on.   The 
smallest can safely carry the 8 amps even if that circuit only draws 1 
amp.  To determine a fuse size, when the value is unknown, simply just 
insert an ammeter in place of the fuse and read the current draw in 
amps.  You can safely use an 8 amp if the draw is anything less than 8.  
You'll see a co;or with a number which tells the circular mil size.
Pardon typos etc, my eye sight isstill bad  fred Di matteo
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