975-0395-01-01
9
Basic Installation Procedures
This guide for use by qualified personnel only.
AC Cabling
AC cabling includes all the wires and connectors between the AC
source and the Freedom HF, as well as all cabling between the
Freedom HF and the AC output panels, circuit breakers, and loads.
The type and size of the wiring varies with the installation and load.
For example, in high vibration environments, such as marine or RV
applications, wire nuts may not be acceptable, so crimp splices
would be required. In other applications, flexible multiple-strand
wire may be required. Installation codes usually specify solid or
stranded, overall size of the conductors, and type and temperature
rating of the insulation around the wire.
AC breakers and fuses must be sized to adequately protect the
wiring that is installed on the input and output AC circuits of the
Freedom HF. All breakers and wiring must be sized and connected
in accordance with the electrical codes or regulations applicable to
your installation. Table 1 gives some examples of wiring sizes
based on the U.S. National Electrical Code and the Canadian
Electrical Code. These examples are based on using a two-
conductor-plus-ground cable rated at 75
°
C, and assuming an
ambient temperature of up to 30
°
C. Ensure that your breakers, and
fuses have suitable temperature ratings for your wiring. Other codes
and regulations may also be applicable to your installation.
AC Output Neutral Bonding
The neutral conductor of the Freedom HF’s AC output circuit (i.e.,
AC Output Neutral) is automatically connected to the safety ground
during inverter operation. When AC utility power is present and the
Freedom HF is charging, this connection is not present, so that the
utility neutral (i.e., AC Input Neutral) is only connected to utility
ground at your source. This conforms to National Electrical Code,
which requires that separately derived AC sources (such as inverters
and generators) to have their neutral conductors tied to ground in the
same way that the neutral conductor from the utility is tied to
ground in only one place. Check the regulations for your specific
application to ensure that the installation will comply with the
necessary requirements. In other words, the AC Input Neutral and
Output Neutral must be isolated from each other.
Table 1
Required AC Wire Size vs Breaker Rating
Breaker Size (amps)
10A
15A
20A
30A
Minimum Wire Size
14AWG
14AWG
12AWG
10AWG
Freedom HF Install Guide.book Page 9 Friday, May 18, 2018 11:38 AM