Blue Sea Systems Marine GPS System PN 8261 User Manual

WARNING  
Marine Electrical Products  
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It is not possible within the scope of these instructions to fully acquaint  
the installer with all the knowledge of electrical systems that may be  
necessary to correctly install this product. If the installer is not  
knowledgeable in electrical systems we recommend that an electrical  
professional be retained to make the installation.  
DC Power Distribution Panel  
PN 8261 8 Position Water Resistant  
PN 8262 4 Position Water Resistant  
Panel Specications  
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If the panel front is to be exposed to water it must be properly sealed to  
the instrument panel surface. The included gasket must be in place  
and the panel screwed down tight.  
The panels must not be installed in explosive environments such as  
gas engine rooms or battery compartments as the switches are not  
ignition proof.  
The main positive connection must be disconnected at the battery post  
to avoid the possibility of a short circuit during the installation of this  
distribution panel.  
Material:  
0.100” 5052-H32 Aluminum Alloy  
Primary Finish:  
Chemical Treatment per Mil Spec C-5541C  
Final Panel Finish: Graphite color 2 part textured Polyurethane  
Fuse Holder:  
Accepts commonly available AGC (fast acting) and  
MDL (slow blow) 1-1/4” x 1/4” glass fuses.  
15 Ampere AGC (fast acting) fuses installed.  
Fuses:  
Amperage Rating: Switches and Fuse Holders,  
20 amperes maximum for 12 volt system  
15 amperes maximum for 24 volt system  
Cumulative Rating: 45 Amperes  
Guarantee  
Voltage Rating:  
Circuit Indicator:  
Panel Depth:  
Panels are rated for 12 or 24 volts DC.  
LED embedded in switch, rated 100,000 hour 1/2 life  
2-3/4” 69.90mm  
Any Blue Sea Systems product with which a customer is not satised  
may be returned for a refund or replacement at any time.  
PN  
Inches  
Millimeters  
238.00 x 95.30  
133.40 x 95.30  
Useful Reference Books  
Overall Dimensions: 8261 9-3/8 x 3-3/4  
8262 5-1/4 x 3-3/4  
Mounting Centers: 8261 8-17/32 x 2-29/32 216.90 x 74.20  
8262 4-13/32 x 2-29/32 112.30 x 74.20  
Calder, Nigel, 1996: Boatowner’s Mechanical and Electrical Manual,  
2nd edition, Blue Ridge Summit, PA: TAB Books, Inc.  
Wing, Charlie, 1993: Boatowner’s Illustrated Handbook of Wiring,  
Blue Ridge Summit, PA: TAB Books, Inc.  
Water Resistant:  
Will withstand the water exposures normally  
encountered in above deck applications: Salt spray,  
rain, hose washdowns, momentary immersions.  
Related Products from Blue Sea Systems  
PanelBack Insulating Covers  
High Amperage Fuses and Circuit Breakers for positive feed wires  
High Amperage Battery Switches  
Terminal Blocks and Common Bus Connectors  
AC Distribution Panels  
DC Distribution Panels  
AC and DC Voltmeters and Ammeters  
The Purpose of a Panel  
There are ve purposes of a marine electrical panel:  
• Power distribution  
• Circuit (wire) protection  
• Circuit ON/OFF switching  
• Metering of voltage and amperage (In panels with meters)  
• Condition Indication (circuit energized)  
Document 9836 Rev.F  
Wire Sizing Chart  
1. Calculate the maximum sustained amperage of the circuit. Measure  
the length of the circuit from the power source to the load and back.  
2. Decide whether the circuit runs in an engine space or non engine  
space. Engine spaces are assumed to be at 50 degrees C, non engine  
spaces are assumed to be at 30 degrees C.  
3. Multiply the maximum current times the length of the circuit to calculate  
Famps (Feet x amps).  
4. Base the wire on either the 3% or 10% voltage drop. In general, items  
which affect the safe operation of the boat and its passengers (running  
lights, bilge blowers, electronics and distribution panel supply circuits)  
use 3%; all other loads use 10% (cabin lights, bait pumps).  
5. Starting in the column which has the right voltage and voltage drop  
shown at the top, run down the list of numbers until arriving at a value  
which is greater than the calculated Famps. Move left to the Ampacity  
column to verify that the total amperage of the circuit does not exceed  
the maximum allowable amperage of the wire size for that row. If it  
does, move down until the wire ampacity exceeds the circuit  
amperage. Finally, move left to the wire size column to select the wire  
size.  
Note: This chart assumes wire with 105°C insulation rating and AWG wire sizes.  
*Metric wire sizes may be used if of equivalent circular mil area.  
Examples  
a. A 12 volt system at 10% drop with a 40’ circuit x 45 amps = 1800  
Famps. A wire size of 8 is required.  
b. A 24 volt system at 3% drop with a 10’ circuit x 100 amps = 1000  
Famps. A wire size of 6 is required.  
Blue Sea Systems Inc.  
425 Sequoia Drive  
Phone (360) 738-8230  
Fax (360) 734-4195  
Bellingham, WA 98226 USA  
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