Owner`s manual

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5. Safety
The BWC EXCEL 1 should never be installed close to a power line. We recommend that the tower be at
least 1 ½ times the height of the tower from any power line including any overhead service line bringing
power to your home.
Warning
The wind turbine towers are typically
made of metal, which readily conducts
electricity. If any part of the wind tur-
bine or tower makes contact with power
lines there is a risk of electrocution.
We also recommend that any guy wire anchors be kept away from roads or paths used by vehicles.
D. Wiring
The basic electrical schematic for the BWC EXCEL 1 battery charging system is shown in Figure 5.
The wind turbine alternator produces 3-phase AC, which is rectified into DC in the nacelle. A two (2)-
conductor wire is needed between the wind turbine and the PowerCenter controller. The PowerCenter
has a fuse for the wind turbine input, so a fused-disconnect switch is not required at the base of the tower
(as is recommended for the other BWC wind turbines).
We recommend that the tower wiring be with SO cord. The SO cord’s neoprene jacket will provide good
abrasion resistance. For ground runs we recommend THHN wire buried inside plastic conduit rated for
electrical service. A suitable watertight junction box should be installed at the base of the tower to en-
close the wire connections between the tower and underground wiring.
In some cases it will be possible to provide direct point-to-point wiring between the EXCEL 1 wind turbine
and the PowerCenter. For this purpose we recommend 2-conductor VNTC (Vinyl Nylon Tray Cable),
which is suitable for outdoor and direct-burial applications. For rocky soils, or runs underneath roadways,
we recommend that the underground wire run be installed in conduit. If a wiring junction is made at the
base of the tower then a watertight junction box should be installed for the connections.
The recommended wire sizes for the 24 VDC EXCEL 1 wind turbine are shown in Table 3. The listed
distances include the height of the tower.
Maximum Current: 60 amps
Caution
Installing wire sizes larger than those
recommended will increase the maxi-
mum current produced by the turbine.