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Installation
Overcurrent Protection
Conductor Termination
AC Interface
DC Interface
3–10
Unless provided as part of the Xantrex supplied equipment; the AC overcurrent
protection for the Utility Interconnect (Grid-tie) must be provided by the installer
as part of the GT100 installation.
CAUTION: Equipment Damage
In accordance with the NEC, ANSI/NFPA 70 (Ninth Edition) the following branch-circuit
overcurrent protection must be provided:
•
GT100-208-NG and GT100-208-PG — 400A maximum
•
GT100-480-NG and GT100-480-PG — 200A maximum
The GT100 has terminals and bus bars for making all wiring connections required
for the installation. All terminals and bus bars used for making AC and DC
connections require the use of copper conductors only with an insulation rating of
90 °C. The optional Fused Combiner (GTFC), if installed, requires the use of
copper conductors only with a maximum insulation rating of 75 °C. For bolt size,
and torque values for the AC terminals, see Table A-5 on page A–5. For bolt size,
and torque values for the DC terminals, see Table A-6 and Table A-7 on page A–
5. All wiring methods and materials shall be in accordance with the National
Electrical Code ANSI/NFPA 70, as well as all state and local code requirements..
The AC line terminals in the AC Interface (TB1-A, TB1-B, TB1-C, and TB1-N)
have one bolt per bus and a maximum of two cables per bolt. These terminals
require the use of crimp-on type ring-terminals or compression lugs.
See Figure 3-9 on page 3–13 for the location of these terminals.
The system/chassis ground terminal in the AC Interface (TB2-Ground) is six bolts
per pole and a maximum of two cables per bolt. These terminals require the use of
crimp-on type ring terminals or compression-type lugs.
See Figure 3-9 on page 3–13 for the location of this terminal.
The Auxiliary Control Interface terminals are one wire per terminal (TB7-1, TB7-
2, TB7-3, and TB7-4). These terminals require the use of crimp-on type ring-
terminals or compression lugs.
See Figure 3-10 on page 3–13 for the location of these terminals.
The DC terminals in the DC Interface [TB3, TB4, and TB5 (PV GND)] have six
bolts per pole and a maximum of two cables per bolt. These terminals require the
use of crimp-on type ring-terminals or compression lugs. The optional Fused
Combiner (GTFC) assemblies, if installed, include one box style connector per
fuse for cable termination. See Figure 3-11 on page 3–14 for the location of these
terminals.
Important:
Keep these cables together as much as possible, and ensure that all cables
pass through the same knockout and conduit fittings, thus allowing any inductive currents
to cancel.
This manual for use by qualified installers only
153379
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