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9

Nothing 

comes close to a Cobra

®

8

English

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 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 #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 four feet (one and a 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 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.

2. On the end of the cable that connects to the inverter,

strip back the insulation about one-half inch (one and
one-half cm), exposing the bare copper conductor.

3. Connect cable 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.

4. Connect cables to the power source:

a. Connect the cable from the Negative (Black)

Terminal of inverter to the Negative Terminal
of the power source. Make a secure connection.

Connecting Cables

Connecting Cables

Intro

Operation

Customer
Assistance

Warranty

Notes

Notice

Secondary Icons

Caution

Warning

Installation

Installation

Intro

Operation

Customer
Assistance

Warranty

Notes

Notice

Secondary Icons

Caution

Warning

Installation

Installation

On/Off Switch to Off

Strip the Insulation

Insert Bare Cables

Intro

Operation

Customer
Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

Summary of Contents for CPI 1550

Page 1: ...you require further assistance after reading this manual Cobra Electronics offers the following customer assistance services For Assistance in the U S A Automated Help Desk English only 24 hours a day...

Page 2: ...s Notice Main Icons Secondary Icons Caution Warning Installation On Off Power Switch Remote On Off Switch Jack AC Outlets Current Meter Positive Battery Cable Terminal Red Negative Battery Cable Termi...

Page 3: ...manual CAUTION Statements specify conditions which could cause damage to the unit or other equipment WARNING Statements identify conditions that could result in personal injury or loss of life Genera...

Page 4: ...chargers for battery packs used in hand power tools These chargers have a WARNING label stating that dangerous voltages are present at the battery terminals This problem does not occur with the vast m...

Page 5: ...f inch one and one half cm back from the end exposing the bare copper The other end of the cable which connects to the power source must be terminated with a lug or other connector that provides a sec...

Page 6: ...struct ventilation openings Do not install inverter in a zero clearance compartment Overheating may result CAUTION The inverter must only be connected to batteries with a nominal output voltage of 12...

Page 7: ...ble 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...

Page 8: ...entilate the battery compartment before making this connection b Connect the cable from the Positive Red Terminal of the inverter to the Positive Terminal of the power source the battery s main fuse o...

Page 9: ...and the total estimated running time in hours Power x Operating Time Watt Hours 4 Divide the watt hours by 10 to determine how many power supply s 12 volt ampere hours will be consumed Ground Wiring...

Page 10: ...pplied to the load the inverter draws less than 500 milliamperes from the battery This is low current draw It would take more than a week to discharge a 100 ampere hour battery at this rate depending...

Page 11: ...l at start up Current Meter The current meter indicates the current drawn from the battery It will not indicate the current drawn by other loads also connected to the battery For long term operation t...

Page 12: ...bserve correct polarity Check connections Make sure battery is fully charged 19 Nothing comes close to a Cobra Specifications Intro Operation Customer Assistance Warranty Notes Notice Secondary Icons...

Page 13: ...hased in the U S A Cobra Electronics Corporation warrants that its Cobra power inverter and the component parts thereof will be free of defects in workmanship and materials for a period of two years f...

Page 14: ...est Cortland Street Chicago IL 60707 USA To order online please visit our website www cobra com Amount Shipping Handling 10 00 or less 3 00 10 01 25 00 5 50 25 01 50 00 7 50 50 01 90 00 10 50 90 01 13...

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