Blue Sea Systems ST (screw terminal) blade fuse blocks provide up to 12 circuits for marine duty electrical systems. Available with or without a negative bus terminal strip. Fuse blocks are available with or without cover. Fuses sold separately.
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Clear insulating cover with label recesses accept Small Format Labels
Cover Satisfies ABYC/USCG requirements for insulation
Tin-plated copper buses and fuse clips give 30 Amperes rating per circuit
Accepts ATO and ATC fast acting blade fuses
20 write-on circuit labels included
Polycarbonate Cover Material
ATO/ATC Fuses Available - 1 to 30 Amperes
Maximum Amperage Per Circuit - 30 Amperes
Maximum Amperage per Block - 100 Amperes
Maximum Voltage Rating - 32 Volts DC
Reinforced Polycarbonate Base Material
Cover provides storage for spare fuses
Blue Sea Systems
How do you know to get one with a ground or without a ground?
I always use on with a ground. This way you come from the battery with two heavy wires one red and one black for + and -Then you can feed all your equipment from the block. Easier troubleshooting when a problems occur.
The ground buss bar is included in the one covered unit. Without that, you would have to install a separate ground buss bar for all your ground wires.
would i have trouble using all 12 circuits on one 12 volt battery? Can i connect two batteries to the block? Will it overload the circuit block if i bridge two 12 volt batteries together?
Hi Daron,Your question is not really about the fuse block, it is more a basic wiring question. I recommend you pick up an excellent book by Nigel Calder called "Boatowner's Mechanical and Electrical Manual". There are also many other books on boat wiring. That said, yes, you can bridge two 12V batteries together in parallel and connect to the fuse block (or connect in series if you want a 24V system). There are several important things that really matter for wiring your fuse block. First, the sum of your circuits must not exceed 100 amps, which is the fuse block rating. Second, none of your individual circuits on the fuse block can exceed 30 amps, which is the highest amperage ATO/ATC fuse you can buy. Third, you absolutely must use a large enough wire for both positive and negative cables from battery to fuse block or bus bar and proper marine terminals properly crimped with the right tool (and adhesive lined heat shrink tubing is highly recommended). A book like Nigel Calder's will explain what goes into deciding on that wire size, but if it helps any I'm using 4 AWG Ancor battery cable and HD lugs. Your cable should be covered in plastic split loom to prevent chafing and secured the entire length with cable ties or other method to prevent flexing, and ABYC says (with a couple exceptions) you need a fuse or circuit breaker very close to the battery, which will prevent your boat from catching fire if the insulation gets chafed or your terminals are not installed as well as you thought they were, because those cables will short like an arc welder. A couple options include a MRBF fuse on the positive battery terminal or a surface mounted circuit breaker next to the battery. Good luck with your project.
Yes you can connect two batteries to the block but be sure they are in parallel which will provide 12 at double the current. All 12 circuits will be just fine with only one battery if the current draw is not too much to drain the batteries between charges. You have to add the amp ratings of each large item connected to the Block.hope that helpsLarry Browning
I would buy this product again
Matt the fisherman
perfect upgrade, it fit my project boat
I used this to upgrade my 1974 Whitewater Jet drive center console 22'pug nose. This boat has great lines and has a 302 ford small block. It was used in a salt water situation and developed many points of breakdown in the electrical system. So it was start from scratch to update every connection. It didn't help that it set out in the weather and was loaded with pine cones and needles from the great north west. It has been a 5 year make over and is drawing close to completion thanks to the new fuse block. It gives direction and organization toward the end of the project.
Perfect size for all jobs
Installed on Fireturck used for fighting forest fires, Fit well under the hood and did not take up much space at all, works very well! VERY HAPPY with this product!
Very nice easy to install unit
Replaced old tube style fuse block with blade terminals with this unit . Very nice unit i got it with the cover. Cover is nice and locks in place so it won't fall off. All screw terminals on it positive on one side negative on the other. Also includes labels with it they are blank to write your own.
Spring grove ,Pa
Great Product for all size boats
Ease Of Use Can easily add more accessories
Excellent fuse block
This Bluesea fuse block is an outstanding piece of gear. It has a very small footprint yet room for 12 circuits. The blade type fuses are a good choice because they are rugged, small and easy to get. A quality unit.