Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092
A5E33045207A
E87010-A0401-T002-A5-MCC
tiastar
TM
Motor Control Center
Page 12 of 12
10. Recommended Tightening Torques
When making bolted assemblies, the following consider-
ations should be generally followed:
10.1 Metal-to-Metal
Thread Size
Torque (lb-in.)
8 – 32
20
10 – 32
27 – 32
1/4 – 20
75
5/16 – 18
100
3/8 – 16
247
1 – 13
613
10.2 Control Terminals – 11 lb-in
Apply 2/3 of standard tightening torque.
10.3 400A and 600A fixed mounted unit clamp assembly
bolts should be tightened to 280 in-lbs.
10.4 Follow torque requirements of individual components
for motor / load connections.
11. Additional Resources
11.1 MCC Installation Guide:
E87010-A0156-T003-A5-MCC
11.2 Unit Support Assembly Guides
:
E87010-A0279-T002-A5-MCC
E87010-A0280-T002-A5-MCC
E87010-A0281-T002-A5-MCC
11.3 6” Unit Handle Instruction Sheets:
11.3.1 125A CB w/Reset –
E87010-A0269-T003-A5-MCC
11.3.2 125A EG CB w/Reset –
E87010-A0276-T003-A5-MCC
11.3.3 125A EG CB –
E87010-A0277-T003-A5-MCC
