DEH40635
AN 12-1007 Rev.02, 04/04/2012
Table 2
UL508 Requirement
Table 54.1 , Tightening torque for screws
Test wire size installed
in connector (AWG)
Tightening torque (lb in.)
Slotted head no 10 and large
Hexagonal head - external drive
socket wrench
Slot width - 0.047 inch
or less and slot length
1/4 inch or less
Slot width
- 0.047
inch or
slot
length -
over 1/4
inch
Split bolt connectors
other
connectors
18-10
20
35
80
75
8
25
40
80
75
6-4
35
45
165
110
3
35
50
275
150
2
40
50
275
150
1
-
50
275
150
1/0 - 2/0
-
50
385
180
3/0-4/0
-
50
500
250
250-350
-
50
650
325
400
-
50
825
375
500
-
50
825
375
600-750
-
50
1000
375
800-1000
-
50
1100
500
1250-2000
-
-
1100
600
Note : For values of slot width or length not corresponding to those specified, the largest torque
value associated with the conductor size shall be marked. Slot width is the normal design value.
Slot length shall be measured at the bottom of the slot
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