GE Industrial Solutions AKD-20 Low Voltage Switchgear - Manuel (Page 61)

AKD-20 Low Voltage Switchgear
Appendix A. Torque Values
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Hardware
Size
Torque*
(ft/lbs)
Standard Nut with
Conical Spring Washer
or Lockwasher
1/4-20
3/8-16
1/2-13
5/8-11 7-10
25-30
35-40
45-55
*These torque values are for non-lubricated threads
Table A-1—Torque Values for Low- voltage
Equipment Electrical Joint Hardware other
than Cable Terminals (Copper, Tin or Silver
Plated)
Caution should be exercised when installing parts or
components to the compartment molded base. Torque 1/4-
inch screws slowly and do not exceed nine ft/lbs.
Table A-2—Torque Values for Self-threading
Screws in Plastic
Wire
Size
Torque*
(in/lbs)
6
5
4
3
100
3
2
1
125
0
00 150
000
0000
200,000
200
250,000
300,000
350,000
400,000
250
500,000
600,000
700,000
750,000
300
800,000
900,000
1,000,000
400
1,250,000
1,500,000
1,750,000
2,000,000
500
*These torque values are for non-lubricated threads.
Table A-3—Torque Values for Cable Terminals