Thomas & Betts 20D, 15D owner manual Grounding, Neutral Bonding

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INSTALLATION

Grounding

For safety purposes, the chassis of the inverter/charger must be connected to your AC ground system. Use 8 AWG bare copper or green insulated wire, strip one end and use a screwdriver to secure it to the chassis ground bonding lug on the side of the unit. This wire will connect to the ground in your AC electrical system. Make sure the connection is clean and tight.

The system AC ground bonding terminal is located on the front of the unit under the wiring cover at the bottom of the unit. This connector is for the bare copper or green ground wires from the AC branch circuit supply and to the AC loads or distribution panel. It is important that these AC input and AC output ground wires connect to the AC ground bus in the circuit breaker panels.

Some installations require heavier grounding wire. Conform to local and national electrical codes.

More information on grounding can be found in the National Electrical Code and local electrical codes.

Note: The battery cables are not connected to the AC ground strip or to the chassis lug of the unit.

Neutral Bonding

For safety purposes and NEC code requirements, the Freedom Combi unit internally bonds the AC output neutral (white) to the AC output ground (green), when the unit is OFF or in the inverter mode. When incoming AC power is applied and the transfer switch is engaged, the internal neutral-to- ground bond is automatically lifted.

When external AC power is applied, the grounding system is connected to the source power ground, where neutral and earth ground are bonded together. This technique insures safety in all conditions and conforms to the requirements of the NEC.

WARNING

Do not connect incoming AC from any source to the AC output of the inverter/ charger. This is known as back-feeding and will damage the unit and void the warranty. The Over Temp/Overload and Low Battery LEDs will be blinking rapidly if this condition exists.

Freedom 20D

Ground Lug

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Part No. 90-0123-00 Libertycombi.p65 10/26/98

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Contents INVERTER/CHARGER Safety Summary Table of Contents Introduction Freedom 15 & 15D Watts Freedom 20 & 20DFreedom 15 & 15D Amps DC Freedom 20 & 20D Electronic ProtectionThings YOU should Know 15D 20DTemperature Sensitive Charging External AC Power Front Panel Controls and IndicatorsInvert Mode Charge ModeBattery Type Selection LOW Battery Red LEDStatus LEDs Operation StatusLOW Battery & OVERTEMP/OVERLOAD TSC Temperature Sensitive ChargingOptional Remotes Remote Control Panel Advanced Remote Control Panels Link InstrumentLink Link 2000RBattery Types Wet Cell BatteriesQuality deep-cycle batteries offer good Battery Interconnection BatteriesBattery Bank Ratings and Sizing ParallelOnly similar batteries should be Typical Power Consumptlon AMP-HOUR Consumption FormulasBattery Charging Battery ChargingFreedom Battery Chargers Battery charger stages are Acceptance to Float Transition Points Battery Charging Battery Charging Battery Charger Voltage Settings Installation Precautions Unvented compartments containingConfirm that your shipping carton contains Typical Tools NeededInstallation Auxiliary Switch Port Jumper Grounding Neutral BondingInstallation AC WiringGround Fault Circult Interrupters DC WiringPathMaker Models Battery Cable Fusing Recommended Fuse UL Listed Class TInstallation Test the transfer functionTest the battery charger function Troubleshooting LED Status Troubleshooting Glossary LED Light Emitting Diode Indicator light Specifications Warranty Phone numbers 253