Installation manual

Planning
2–2 153396 Revision D
This manual is for use by qualified installers only
Overview of Xantrex GT250 Installation
Planning Planning for a system requires complete understanding of all the components
that are involved to successfully install the Xantrex GT250 to meet the required
national, state, and local codes.
Definition A power system (such as the Xantrex GT250) is a collection of devices designed
to supply AC power to the utility grid from a DC solar energy (PV) source.
Components All types of grid-tied inverter installations, residential or industrial, share common
components. This chapter describes each component and suggests the
minimum requirements for a safe installation.
Location The Xantrex GT250 Grid-Tied Photovoltaic Inverter meets certification for both
indoor and outdoor installation. Anchor the Xantrex GT250 to a level, non-
combustable concrete floor or pad.
Clearance Adequate ventilation and service access must be considered when installing the
Xantrex GT250. See “Environmental Requirements” for specific clearance
requirements and ambient temperature requirements.
Conduits and
Conductors
All external conduits and conductors are to be supplied by the installer.
See Figure 2-3, “Conduit Entries Above Ground, Multiple Views” on page 2–7 for
recommendations on enclosure penetration locations and cable routing.
All interconnect wiring and power conductors interfacing to the Xantrex GT250
must be in accordance with the National Electric Code ANSI/NFPA 70, and any
applicable local codes.
Large gauge wire must conform to the minimum bend radius specified in the NEC.
Keep the wire bundles away from any sharp edges which may damage wire
insulation over time.
All conductors should be made of copper and rated for 90 °C.
If the installation of the Xantrex GT250 is to be outdoors, all interconnect conduit
and fittings must be NEMA 3R rated as required by the NEC.
Arc Flash Calculate the arc flash category and PPE requirements. Refer to “Arc Flash
Information” on page A–5 to determine the short-circuit current and duration that
the inverter adds to the arc-flash calculation.
WARNING: Risk of electric shock, explosion and arc flash
Installations of this equipment should only be performed by qualified technicians.
Installers must meet all local and state code requirements for licensing and
training for the installation of Electrical Power Systems with AC and DC voltage to
600 volts.