Xantrex Technology GT3.0 Preparing for the Installation, Wiring, AC Circuit Breaker Requirements

Preparing for the Installation

Preparing for the Installation

	Ensure your local utility is consulted for any requirements for connecting to or
	returning power to the grid. Obtain all permits necessary to complete the
	installation. Consult your local/national electrical code for more information.
	This section includes the following topics:
	• “Wiring” on page 2–13
	• “Circuit Breakers and Disconnect Switch” on page 2–13
	• “Other Materials Needed” on page 2–14
	• “Equipment Needed” on page 2–14.
	Important: In this manual “wiring” and “wires” are used in reference to both AC and
	DC wiring/cabling and wires/cables.
Wiring
	Wire size and length will be determined by the location of each component and
	their relative distance to each other. Wire sizes may also be affected by whether or
	not conduit is used.
Recommended wire	Strip all wires 9 mm (3/8 inch).
stripping length
Acceptable wire	The AC and DC terminal blocks in the GT Inverter accept wire sizes from
sizes	#14 AWG to #6 AWG.
	Wiring should be sized such that the maximum voltage drop at full power from
	the PV array to the inverter is 2% or less.
	Important: Wiring should not be undersized. Undersizing of wiring can result in
	significant power losses and reduction in system efficiency.

Circuit Breakers and Disconnect Switch

The following circuit breakers, disconnect switch and fuse are required for installing this equipment.

AC Circuit Breaker Requirements

In North America, the main utility service panel must dedicate a double pole breaker (240 volts AC) to operate each GT Inverter installed. The GT Inverter requires a 20-Amp breaker.

975-0131-01-01 2–13