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IB01602078E
Instruction Booklet
Page
20
Effective: September 2011
40-400A (480/600Vac) ATC-300+ 3-Postion
Contactor Based Transfer Switch
4.8 Terminal Block Wire Installation and Removal
Proceed with the following steps and associated figures to install
or remove terminal block wiring.
Step 1:
Figure 14 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.
TOOL HOLE
WIRE HOLE
Figure 14. 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. 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 15. 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. Push the wire in until it can go no further.
Figure 16. 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.
Figure 17. Wire Securely Installed in the Terminal Block.
