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4400 Series Installation and Operation Manual – 64527-008
FIGURE 9.7: REMOVE INSTALLED LUGS
FIGURE 9.8: INSERT NUT KEEP
3. Install the Bus Stubs
a. Thread a stando insulator onto one of the two pem studs to the right of the breaker and tighten nger tight. (Fig-
ure 9.9-A)
b. Thread the remaining stando insulator on the remaining pem stud. (Figure 9.9-B)
c. Insert a bus stub into the circuit breaker’s upper nut keep. Secure it with the ¼” x 20 cap screw. (Figure 9.10)
d. Secure the bus stub to the stando insulator with a ¼”x20 ½ in. Sems bolt. (Figure 9.10)
e. Repeat Steps c & d for the remaining bus stub.
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