9
2-5-1 Neutral Grounding (GFCI’s):
2-5-1-1 120V models:
The neutral conductor of the AC output circuit of the Inverter is
automatically connected to the safety ground during inverter operation. According to
National Electrical Code requirements that separately derived AC sources (such as
inverter and generators) have their neutral conductors tied to ground in the same way
that the neutral conductor from the utility is tied to ground at the GFCI breaker panel.
For models configured with a transfer relay, while AC utility power is presenting and
the Inverter is in bypass mode, this connection (neutral of the Inverter’s AC output to
input safety ground) is not present so that the utility neutral is only connected to
ground at your breaker panel, as required.
2-5-1-2 230V models:
There is no connection made inside the Inverter from either the line or
neutral conductor to the safety ground.
Ground Fault Circuit Interrupters (GFCI’S):
Installations in Recreational Vehicles (for North American approvals) will require GFCI protection
of all branch circuit connected to the AC output of the hardwire terminal equipped inverter. In
addition, electrical codes require GFCI protection of certain receptacles in residential installations.
While the pure sine wave output of the inverter is equivalent to the waveform provided by utilities,
compliance with UL standards requires us to test and recommend specific GFCI. Our company
has tested the following GFCI-protected 20A receptacles and found that they functioned properly
when connected to the output of the inverter.
2-6
Making DC Wiring Connections
Follow this procedure to connect the battery cables to the DC input terminals on the inverter.
Your cables should be as short as possible (ideally, less than 10 feet / 3 meters) and large
enough to handle the required current in accordance with the electrical codes or regulations
applicable to your installation.
Cables that are not an adequate gauge (too narrow) or are too long will cause decreased
inverter performance such as poor surge capability and frequent low input voltage warnings and
shutdowns. These low input voltage warnings are due to DC voltage drop across the cables
from the inverter to the batteries.
The longer and narrower these cables, the greater the voltage drop.
WARNING!
Do not operate the power inverter without connecting it to
Ground.
Electrical shock hazard may result.
YOUR CONNECTION TO SAFETY
Thiele KG
• V
orderer W
einberg 26 • D-71522 Backnang • T
el.: +49 (0)7191 3560-0
• Fax.: +49 (0)7191 3560-19
• www
.thiele-kg.de
Thiele KG
• V
orderer W
einberg 26 • D-71522 Backnang • T
el.: +49 (0)7191 3560-0
• Fax.: +49 (0)7191 3560-19
• www
.thiele-kg.de
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