Winco ASCO 300 J Design 600 Amp - Manual (Page 5)

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.
Remove the Shipping Skid
Open the front door and remove the four lag screws (2
in front, 2 in rear) securing enclosure to the wood skid.
Supporting Foundation
The supporting foundation for the enclosure must be
level and straight. Refer to the applicable enclosure
outline drawing included with the Series 300 for all
mounting details including door opening space.
If bottom cable entry is used, the foundation must be
prepared so that the conduit stubs are located
correctly. Refer to the enclosure outline drawing for
specified area and location. Provide cable bending
space and clearance to live metal parts. When a
concrete floor is poured, use interlocking conduit
spacer caps or a wood or metal template to maintain
proper conduit alignment.
Mounting
Refer to the applicable enclosure outline drawing
furnished with this switch and mount the Series 300
according to details and instructions shown on diagram.
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.
It is unnecessary to remove pole covers from the
transfer switch. If you do remove them, reinstall them
carefully.
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
generator starting control in the OFF position.
Make sure engine generator is not in operation.
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-suspended 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.
NOTICE
Protect the automatic transfer switch from
construction grit and metal chips to prevent
malfunction or shortened life of the ATS.
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.
Controller Ground
A grounding wire must be connected to the controller’s
lower left mounting stud. Because the controller is
mounted on the enclosure door, a conductive strap
must be used between the enclosure and the door.
This connection provides proper grounding which does
not rely upon the door hinges.
Harnesses
The transfer switch is connected to the left side of the
controller by a plug–in harness (two plugs).