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Connecting Cables
Installation
Connecting Cables (not included)
Power wire and wiring are very important to the performance of the inverter.
Because the inverter has a low voltage, high current input, low resistance wiring
is essential between the battery and inverter. This is so it can deliver the maximum
amount of energy to the load.
Use only copper wire. Aluminum wire has about
wire of the same size, plus it is difficult to make good, low-resistance connections
to aluminum wire.
We recommend #4 AWG copper cable (90°C insulation rating) as the minimum
size for connections between the battery and inverter.
Keep the cable length as short as possible, no more than 4 feet (1.5 meters).
This will keep the voltage drop to a minimum.
If the cable has too much voltage drop, the inverter may shut down when drawing
higher currents because voltage at the inverter may drop below 10 volts. If you
must use longer cables, choose thicker cables, such as #2 AWG, and trim the
ends of the cable to fit the terminals.
To Connect the Cables Between the Inverter and the Battery:
1. Turn the On/Off Switch on the inverter to the Off position. If the power
source is a DC power supply, switch it Off as well.
Turn On/Off Switch to Off
2. On the end of the cable that connects to the inverter, strip back the
insulation about
1
⁄
inch (1.25 cm), exposing the bare copper conductor.
2
English
8
•
1
⁄
more resistance than copper
3
Connecting Cables
Installation
Strip the Insulation
3. Connect cables to the Power Input Terminals on right side panel of the inverter. The
red terminal is positive (+) and the black terminal is negative (-). Insert the bare ends
of the cables into the terminals and tighten the screws to clamp the wires safely.
Insert Bare Cables
4. Connect cables to the power source:
a. Connect each cable from the Negative (Black) Terminal of inverter to the
Negative Terminal of the power source. Make a secure connection.
b. Connect each cable from the Positive (Red) Terminal of the inverter to the
Positive Terminal of the power source (the battery's main fuse or the battery
selector switch, if you are using one). Make a secure connection.
Connect Cables
You might observe a spark when you make this connection,
since current can flow to charge capacitors in the inverter.
Continued...
Nothing comes close to a Cobra
®
9
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