It is good to keep in mind that a fuse provides full protection only to the 
conductors downstream of the fuse, i.e. between the fuse and the load. While we 
often thing we are protecting the wire between the fuse and the point of 
supply, it gives only limited protection in that portion of the circuit. Using 
a fuse to provide OVERLOAD protection is a bit different than provideing 
OVERCURRENT protection. Worst case scenario is a short circuit in the circut 
ahead of the fuse. The fuse of course provides no protection there. ( And that 
does happen ) "Where is all that smoke coming from??" 

Wes
AE6ZM & VE7ELE
GROL/RADAR
ARRL Technical Specialist
Lincoln, CA
CM98iv

--- In Repeater-Builder@yahoogroups.com, "Paul Holm" <p...@...> wrote:
>
> Fuses protect wiring.
> 
> Equipment should be fused to match the power handling level of the leads 
> that supply it.  For a 100 watt mobile, I would choose 10ga wire (unless the 
> leads needed to be quite long) and fuse it at 30amps.
> 
> 
> 73  Paul

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