Winco ASCO 300 D Design 30-230 Amp - Manual (Page 4)

SECTION 1 INSTALLATION
1--1
Series 300 Automatic Transfer Switches are factory wired
and tested. Installation requires skid removal then
securing the enclosure to the supporting foundation.
Mounting
Refer to the applicable enclosure outline drawing fur-
nished with this switch and mount the Series 300
according to details and instructions shown on diagram.
Protect the automatic transfer switch from
construction grit and metal chips to prevent
malfunction or shortened life of the ATS.
!
Mount the ASCO ATS vertically to a rigid supporting
structure. Level all mounting points by using flat washers
behind the holes to avoid distortion of the switch.
Line Connections
Refer to the Wiring Diagram provided with your Series
300 ATS. All wiring must be made in accordance with the
National Electrical Code and local codes.
De–energize the conductors before making any
line or auxiliary circuitry connections. Be sure
that Normal and Emergency line connections
are in proper phase rotation. Place engine gen-
erator starting control in the OFF position. Make
sure engine generator is not in operation.
It is unnecessary to remove pole covers from the transfer
switch. If you do remove them, reinstall them carefully.
Testing Power Conductors
Do not connect the power conductors to the ASCO
Series 300 transfer switch until they are tested. Installing
power cables in conduit, cable troughs and ceiling-sus-
pended hangers often requires considerable force. The
pulling of cables can damage insulation and stretch or
break the conductor’s strands. For this reason, after the
cables are pulled into position, and before they are
connected, they should be tested to verify that they are
not defective or have been damaged during installation.
Connecting Power Conductors
After the power cables have been tested, connect them to
the appropriate terminal lugs on the transfer switch as
shown on the wiring diagram provided with this Series
300. Make sure the lugs provided are suitable for use with
the cables being installed. Standard terminal lugs are
solderless screw type and will accept the wire sizes listed
on the drawings provided with the Series 300. Be careful
when stripping insulation from the cables; avoid nicking
or ringing the conductor. Remove surface oxides from
cables by cleaning with a wire brush. When aluminum
cable is used, apply joint compound to conductors.
Tighten cable lugs to the torque specified on rating label.
Three cable spacers are included with 150, 200, and 230
ampere transfer switches. When installing power cables,
run the cables through the cable spacers as shown in
Figure 1–1. Position cable spacers within 1½ inches from
lugs.
The cable spacers must be located as shown
for 150, 200, and 230 ampere transfer switches.
!
cable spacer
cable spacers
1 ½ inch approximate
Figure 1–1. Cable spacers for 150, 200, & 230 amp.
transfer switches.