Skystream Owner’s Manual
3-CMLT-1054 Rev O XCO 1191
Pg. 14
INSTALLATION
Introduction
The following sections of this manual assume a tower and foundation appropriate for use with a
Skystream are in place and ready for Skystream to be installed.
XZERES Wind designed Skystream for easy installation by minimizing the number of electrical
connections. Note that National Electric Code, ANSI/NFPA 70 wiring methods are to be used
throughout the Skystream installation.
Wire Sizing
These wire sizing directions are for SINGLE Skystream turbine installations which are home-run to a
main service panel.
DO NOT attempt to use these wire sizing instructions for a Skystream connected to a sub-panel or for
multiple Skystreams together.
Note that the largest wire size that may be connected to the Skystream yaw terminals is #8 AWG
(10 mm
2
). For installations requiring a larger wire size box installed between the tower and utility panel
to transition to a larger wire size (because of distance) XZERES recommends using a disconnect
switch box installed between the tower and utility panel to transition to a larger wire size.
To determine the appropriate wire size measure the total distance from the turbine to the electrical
utility panel including the tower height and refer to the tables below.
Table 1 includes maximum wire length information for wire sizes #8 AWG (10 mm
2
) and smaller without
transitioning to a larger wire size. Select the appropriate wire size based on the total wire length and
Skystream voltage configuration (240 VAC, split phase or 208 VAC, 3 phase).
If the required wire length is greater than can be accomplished with #8 AWG (10 mm
2
) wire refer to
Table 2. This table includes wire size information for installations requiring a transition to a wire size
larger than #8 (10 mm
2
) AWG.
Table 2 provides for a 75 ft. length of # 8 AWG (10 mm
2
) wire to be run from the Skystream yaw to a
disconnect switch box and a length of #4 or # 6 AWG (25 mm2 or 16 mm2) wire to be run from the
disconnect switch box to the utility panel. Select the appropriate wire size combination based on the
wire run length and Skystream voltage configuration.
Note, if needed, the 75 ft. length of #8 AWG (10 mm
2
) wire may be shortened and the larger gauge wire
lengthened a corresponding amount. However, DO NOT lengthen the #8 AWG wire and lengthen the
larger gauge wire.
