SECTION 1 INSTALLATION
1 --- 1
ASCO 7000 Series Autom atic Closed–Transi tion Trans-
fer Switches(ACTSs) are factory wired and tested. Field
installationrequires mounting and connectionof service
cables, and auxiliary control circuits (if required).

Remove the Shipping Skid (large ACTSs)

For large ACTSs, open the front door and remove the
fourlag screws (2 in front, 2 i n 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
outlinedrawing included with the switchfor all mounting
details including door opening space.
If bottom cable entry is used, the foundation must be
prepared sothat the conduit stubs are located correctly.
Referto the enclosure outlinedrawing for specifiedarea
andlocation. Providecable bendingspace and clearance
to livemetal parts. Whena concrete floor is poured, use
interlocking conduit spacer caps or a wood or metal
template to maintainproper conduit alignment.

Mounting

Refer to the applicable enclosure outline drawing fur-
nishedwith this switch and mount the automatic transfer
switch according to deta ils and instructions shown on
diagram.

Line Connections

Refer to the Wiring Diagram provided with the switch.
Allwiring must be made in accordance with theNational
ElectricalCode and local codes.
Iti s unnecessary to remove pole covers fromthe transfer
switch. Ifyou do removethem, 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 gen-
erator starting control in the OFF position. Make
sure engine generator is not in operation.

Testing PowerConductors

Do not connect the power conductors to the 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 insulationand stretch or break the conduc-
tor’s strands. Forthis reason, after the cables are pulled
intoposition, and before they are connected, they should
betested to verify that they are not defective or have been
damaged duringinstallation.
Protect the automatic transfe r switch from
construction grit and metal chips to prevent
malfunctionor shortened life of the ATS.
!

Connecting Power Conductors

Afterthe power cables have been tested, connect them to
the appropriate terminal lugs on the transfer switchas
shown on the wiring diagram provided with the switch.
Make sure the lugsp rovided aresui table foruse wit hthe
cables being installed. Standard terminal lugs are solder-
lessscrewtypeandwillacceptthewiresizeslistedonthe
drawings provided with the switch. 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 joi nt compound to conducto rs.
Tightencable lugs to the torque specifiedon rating label.

Controller Ground

A grounding wiremust 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).