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Old 26 July 2014, 04:55   #11
Country: Canada
Town: Southern Ontario
Boat name: -Unknown-
Make: SeaMax
Length: 4m +
Engine: Merc/Minn Kota
Join Date: Mar 2012
Posts: 216
From your list of items, I'd say the total fuse size to handle all on the main power line (AT THE BATTERY + Seven inches),depends on what you plan to run off the 12 volt socket power-amp wise? Add all the max amp draws for each item , plus anything electrical you may add later then look-up the gauge of the main power wire required from battery and add 2 gauge sizes to know the proper main wire gauge then add the total the main fuse size of what U have added-up, plus 5 Amps.

Two reasons, 1) The heavier the gauge Main wire you use the more power that will be lost during the DC Voltage trip from the battery to the main fuse panel. 2) The main fuse at the battery is there only in-case a short occurs along the route from the battery to the fuse panel. All other shorts between the fuse panel and each powered-item should they occur, will blow the small fuse in the panel.

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