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IB140042EN
For more information visit: www.eaton.com
Instructional Booklet
Effective: May 2015
Page
27
ATC-300/900 Breaker Based Transfer Switch
Figure 26. Line Voltage Plug and Receptacles for Horizontal
Design.
4.9 Terminal Block Wire Installation and Removal
Proceed with the following steps and associated figures to install
or remove terminal block wiring.
Step 1:
Figure 27 shows two tension clamp terminal blocks.
There is a large one and small one, but the operation is
the same for both. A small tool, such as a screwdriver,
will be pushed into the square hole next to the wire hole
and a wire will be inserted into the larger circular hole on
the outer edge.
Figure 27. Tension Clamp Terminal Blocks.
Step 2:
Begin by inserting a small, flathead screwdriver into the
square (tool) hole with the flat surface of the screwdriver
against the back wall of the hole (see Figure 28). With a
little bit of force, push the screwdriver in on a slight angle
toward the center of the clamp. Be sure to slide it in until
it clicks. You will then see the clamp open in the wire
hole.
Figure 28. Screwdriver Inserted in the “Tool” Hole.
Step 3:
Once the screwdriver is in place, obtain a stripped wire
(strip about 1/4 in.) and insert it into the larger circular
wire hole as shown in Figure 29. Push the wire in until it
can go no further.
Figure 29. Wire Inserted in the “Wire” Hole.
Step 4:
While holding the wire in place, pull the screwdriver out.
The wire will now be held securely in the terminal block.
Pull on the wire to insure that it is correctly inserted into
the clamp.
TOOL HOLE
WIRE HOLE