Power outlet fuse ?

[Diabolus]

I bought a power outlet to hook up to the battery but when I tested it with the satnav it blew the inline fuse (glass type) what amp fuse should I use??? , think I have 10 amp upto 35 amp fuses. in 5 amp increments .

[VTRDark]

I would go with a 15A, it should be more than enough. But monitor it and if it pops the 15 check the wiring is not shorting somewhere.

(:-})

[Diabolus]

I think it was a 5 amp that blew straight away so ill try the 15amp

[tony.mon]

a sat nav shouldn't draw 5 amps, surely?

Check the polarity.

[turbo_billy]

Go steady with what you try. The whole purpose of the fuse is to blow before you cause any damage to whatever it is connected to. I would imagine that your satnav is not pulling anywhere near enough power to warrant a 15amp fuse (in your house you only need a 13amp fuse for something like a kettle or toaster) I would say double check the wiring to make sure you haven`t created a short when you hooked up the power outlet. Just my humble opinion.

EDIT. Tony, you beat me to it.......

[darkember]

Agreed with Turbo. Satnav should only require 3 amps at the most. The fuse will be there to protect the device but also to stop your wiring from meltdown.

[sirch345]

As Carl and Turbo says, check out the wiring. I bought one of those power outlets from a UK seller, it was a brand new item for sure as it was in heat sealed clear moulded plastic container.

Mine had a cut in the insulation on the negative (-) side right up close to the body of the power outlet bearing the copper wire underneath
I'm not suggesting you'd miss that, but worth having a close look, as yours could have a damaged live (+) wire. Also as Tony says, make sure the polarity is correct.





Chris.

[Diabolus]

I'll give it a once over with the multi meter.

[darkember]

BTW you aren't colour blind to black & red???

[Diabolus]

BTW you aren't colour blind to black & red???

I need to check the polarity as it was cheep one off e-bay they may have mixed the red and blk up

[macdee]

did the fuse blow when the outlet was first fitted ( nothing plug in )
if not then the wiring doesn't have a short circuit as the fault would still be there and blow the next fuse right away (move wires around to make sure its not intermittent)
i think the next step is to make sure that the positive contact is the one in the center at the bottom of the outlet this checks your polarity .
check that the sat nav on some other supply (car) if it works there then it has no fault either i think most cars have a 15 amp fuse in the cigarette lighter outlet
at this stage i would match the fuse to the one in the test car
a fuse should never be bigger amps than the wire can carry