Connecting Cables

Installation

WARNING This unit contains components which can produce arcs or sparks. To prevent fire or explosion, do not install in compartments containing a battery or flammable materials, or in a location which requires ignition protected equipment.

WARNING This unit is suitable for installation in negative ground applications only. Do not attempt to install to a positive ground application.

Mounting

To mount your inverter:

1.Place the inverter on a flat surface with the mounting bracket against the mounting surface.

2.Mount to secure surface using mounting hardware that is corrosion resistant (not included).

On/Off Switch to Off

The inverter can be mounted horizontally or vertically.

Connecting Cables

Installation

ConnectingCablesStrip the Insulation(not included)

Power wire and wiring are very importantto 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 one-third more resistance than copper wire of the same size, plus it is difficult to make good, low-resistance connections to aluminum wire.

We recommend two #4 AWG copper cables (90°C

insulation rating) as the minimum size for connections

Insert Bare Cables

between the battery and inverter.

Keep the cable length as short as possible, no more than four feet (one and one-half 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 connectthe cables betweenthe 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.

Connect Cables

2.On the end of the cable that connects to the inverter, strip back the insulation about one-half inch (one and

 

 

 

8 English

Nothing comes close to a Cobra® 9

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Cobra Electronics CPI 2550 owner manual Connecting Cables, Mounting To mount your inverter