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View Full Version : Auto bilge pump fuse size?



FNQCairns
08-05-2008, 02:34 PM
I finally fitted an auto bilge pump to compliment my manual one, the pump specifies a 6 amp fuse and a max current draw of 5 amp.

I have in the past read about adding no fuse as a safety measure on auto pumps although I couldn't bring myself to do that and included a fuse at the battery, a 10amp cause atm it's the smallest I have.

Looking for some scope, in theory I want the pump to continue pumping through what might be a minor fuse blowing incident although potentially I do not want the wiring to melt through the hull like it would in a fuseless design nor do I want to trash the pump or the auto switch (can handle 15amp) unless absolutly necessary.

What could in practice be the middle ground for fuse size for me to full fill my criteria?
If anyone could use their experience in electrics to have a stab it would be appreciated.

thanks fnq.

Blackened
08-05-2008, 04:08 PM
G'day

To have a stab and thats all it is, purely on your criteria, stick with 10A

Dave

Spaniard_King
08-05-2008, 07:57 PM
FNQ, the fuse is to protect the wiring, not the pump. Most wiring will handle 15 amps unless its really thin. As a acomparison the the wirring on most bilge pumps will hanle 15 amps.. if the rest of your wiring is similar size go with the 15.. I do

frank100
08-05-2008, 08:20 PM
FNQ,
Stay with the 10A.

Frank

FNQCairns
08-05-2008, 08:55 PM
Thanks blokes for the advice, I gave these connections the full treatment, solder then paint on electrical sealer, self amalgamating tape and finally electrical tape, will split the difference chase up a 12.5amp one probably, 10 sounds a little safe and 15 I don't really understand how much if any damage could be caused if pulling say 14amps for an hour straight.
Would standard 3.5mm (I think) wire even get hot a 14amps??

thanks again

cheers fnq