12v cig adapter. which size fuse?

[slick2526]

Going to make a cig adapter to run of my vex battery to charge my cell phone and run the clam ceiling light/fan. what size fuse would be about right for either of these?

[randerson]

I would stick with 5amp I sell one that goes in truck beds that has 3 12volt outlets and it runs off a 15amp fuse I used one in my enclosed deer stand to charge cell phone and have a small fan and I replaced the fuse with a 5 amp in there as well

[Whoaru99]

Yeah, 5A is plenty. Probably more than what's actually necessary for the mentioned items.

[Macgyver55]

Often the accessories that you plug in have their own fuse in the plug. When using multiple outlets, its a good idea to make sure that the outlet you are fusing is rated a bit higher than the total of all the items plugged into it, but never more than the wire that supplies it can carry. This way if any single item were to short out it would blow the corresponding fuse and not shut down everything else plugged into it.

Its a different story if they are not individually fused. The circuit should not have a fuse any larger than the smallest item to be protected requires, otherwise that accessory is subject to damage if it shorts out due to using a fuse large enough to carry the load of the higher drawing accessories. Check the individual plugs on what you plan to use and you will know which way to go.

[slick2526]

thanks guys.