3.2 Electrical Equipment Connections

3.2.1 High Current 12 VDC Power

Source	Battery Bank, 12 VDC, Marine, Deep Cycle
Voltage Range	11.2 – 14.7 VDC
Continuous Current	55 A
Overcurrent Protection	80 A (Customer Supplied)

High Current 12 VDC Power Connection Instructions

1. Connect positive and negative High-Current 12 VDC cables, 2 AWG (33.6 mm²) conductors, to the 12 VDC power source.
   
   1. The positive and negative cables are supplied with a length of 1.8 m, and approximately 0.5 m is routed within the gyro frame (1.3 m outside frame).
2. Splice customer-supplied 2 AWG conductors to the positive and negative 2 AWG cables per the Crimping Instructions of Figure 4, using Seakeeper-supplied butt connectors, to increase conductors to the desired length. The maximum cable length is 29.53 ft (9.0 m) each. See also Figure 4 below for splicing.
3. Crimp the positive High-Current Cable to B+ Conductor (red). Conductor should be continuous throughout entire length; do not coil. The most direct route to the 12 VDC power source should be used.
   
   1. Repeat Step 3 for the negative High-Current Cable to B- Conductor (black).
   2. Install approximately 2 in. (51 mm) of double wall (adhesive lined) heat shrink tubing over entire butt connector and onto both sides of conductor insulation.
4. Connect positive conductor (B+, red) through dedicated 80 A overcurrent protection device (customer-supplied) and a dedicated isolation switch (customer-supplied), then directly to battery plus terminal or bus bar.
5. Connect negative conductor (B-, black) directly to battery minus terminal or DC negative bus.

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3.2.2 Seawater Pump 12 VDC Power

Power Source	Battery Bank, 12 VDC, Marine, Deep Cycle
Voltage Range	11.2 – 14.7 VDC
Current Rating	Max 15 A rating
Overcurrent Protection	Per pump specification, max 15 A

Seawater Pump 12 VDC Power Input Connection Instructions

1. Connect Seawater Pump Input Cable (P/N: 30327) to Seakeeper 1 “SW Pump DC In” as shown in Drawing No. 90511 – Seakeeper 1 Cable Block Diagram, with overcurrent protection corresponding to seawater pump selected.
2. Connect the 16 AWG (1.5 mm²) plus conductor (red) through dedicated overcurrent protection device (customer-supplied), maximum of 15 A, to dedicated battery isolation switch.
   
   1. The positive High-Current 12 VDC cable, 2 AWG B+ conductor (red), is capable of carrying the current for both the High Current and Seawater Pump from the 12 VDC power supply to the battery isolation switch.
3. Connect the 16 AWG (1.5 mm²) minus conductor (black) directly to battery minus terminal or DC main negative bus.

Seawater Pump 12 VDC Power Output Connection Instructions

1. Connect Seawater Pump Output Cable to the Seakeeper 1 “SW Pump 12 VDC Out” for DC power output to the seawater pump. The cable is a 2 x 16 AWG cable (1.5 mm²), 16 ft (5 m) length, with a size 16 female Deutsch plug.
2. Pumps rated at 12 VDC, 15 A maximum, customer-supplied, must be configured with a Deutsch DT series, 2-pin receptacle to mate with the connector shown in figure 6.

3. The Seawater Pump Output Cable must be routed and installed in the vessel from the Seakeeper 1 “SW Pump 12 VDC Out” Deutsch connector (pins end) to the DC seawater pump cable Deutsch connector (socket end).
   
   1. Connect Seawater Pump Output Cable plug end (female end) to the customer-supplied receptacle end (male end). The recommended wiring is shown in the following figure.

4. Seakeeper DC Seawater Pump Assembly (P/N 30331), which is prewired for DC Seawater Output Cable, is available as an option with the Seakeeper 1.