Product Manual

TP-6946 3/16 23Section 2 Installation

Drill the entry holes. Cover the transfer switch to

protect it from metal chips and construction grit. Then

drill entry holes for the conductors at the locations

shown on the enclosure drawings. Remove debris from

the enclosure with a vacuum cleaner.

Note: Do not use compressed air to clean the switch.

Cleaning with compressed air can cause debris

to lodge in the components and damage the

switch.

Install and test the power cables. Leave sufficient

slack in the power leads to reach all of the power

connecting lugs on the power switching device. Test the

power conductors before connecting them to the

transfer switch. Installing power cables in conduit, cable

troughs and ceiling-suspended hangers often r equires

considerable force. Pulling cables can damage

insulation and stretch o r break the conductor’s strands.

Test the cables after pulling them into position and

before they are connected to verify that they are not

defective and that they were not damaged during

installation.

Connect the cables. Be careful when stripping

insulation from the cables; avoid nicking or ringing the

conductor. Clean cables with a wire brush to remove

surface oxides before connecting them to the terminals.

Apply joint compound to the connections of any

aluminum conductors.

Refer to the wiring diagram provided with the switch.

The connection points on the contactor are labeled

Normal, Emergency, and Load. Be sure to follow the

phase markings (A, B, C, and N). For single-phase

systems, connect to A and C.

Note: Connect the source and load phases as

indicated by the markings and drawings to

prevent short circuits and to prevent phase-

sensitive load devices from malfunctioning or

operating in reverse.

Tighten the lugs. Verify that all connections are

consistent with drawings before tightening the lugs.

Tighten all cable lug connections to the torque values

shown on the label on the switch. See Figure 2-12.

Carefully wipe off any excess joint compound after

tightening the terminal lugs.

297556

Figure 2-12 Torque Label