Torque Requirements For Power Wiring Terminations - BENSHAW RediStart EXEXMVRMX3 Series User Manual

3 - INSTALLATION
3.6.5

Torque Requirements for Power Wiring Terminations

Wire size installed in conductor
AWG or kcmil
18 – 10 (0.82 – 5.3)
8
6 – 4 (13.3 – 21.2)
3
2
1
1/0 – 2/0 (53.5 – 64.4)
3/0 – 4/0 (85.0 – 107.2)
250 – 350 (127 – 177)
400
500
600 – 750 (304 – 380)
800 – 1000 (406 – 508)
1250 – 2000 (635 – 1010)
z NOTE – For a value of slot width or length not corresponding to those specified above, the largest torque value associated with
the conductor size shall be marked. Slot width is the nominal design value. Slot length is measured at the bottom of the slot.
inches
1/8
5/32
3/16
7/32
1/4
5/16
3/8
1/2
9/16
z NOTE – For screws with multiple tightening means, the largest torque value associated with the conductor size
shall be marked. Slot length shall be measured at the bottom of the slot.
24
Table 10: Slotted Screws and Hex Bolts
Slotted head NO. 10 and larger
Slot width-0.047 inch
(1.2mm) or less and
2
(mm )
slot length ¼ inch
(6.4mm) or less
20 (2.3)
(8.4) 25 (2.8)
35 (4.0)
(26.7) 35 (4.0)
(33.6) 40 (4.5)
(42.4) — —
— —
— —
— —
(203) — —
(253) — —
— —
— —
— —
Table 11: Tightening Torque for Inside Hex Screws
Socket size across flats
(mm)
(3.2)
(4.0)
(4.8)
(5.6)
(6.4)
(7.9)
(9.5)
(12.7)
(14.3)
Tightening torque, pound-inches (N-m)
Hexagonal head-external drive socket
Slot width-over 0.047
inch (1.2mm) or slot
Split- bolt connectors
length – over ¼ inch
(6.4mm) or less
35 (4.0) 80
40 (4.5) 80
45 (5.1) 165
50 (5.6) 275
50 (5.6) 275
50 (5.6) 275
50 (5.6) 385
50 (5.6) 500
50 (5.6) 650
50 (5.6) 825
50 (5.6) 825
50 (5.6) 1000
50 (5.6) 1100
— — 1100
Tightening torque
Pound-inches
45
100
120
150
200
275
275
500
600
wrench
Other connectors
(9.0) 75 (8.5)
(9.0) 75 (8.5)
(18.6) 110 (12.4)
(31.1) 150 (16.9)
(31.1) 150 (16.9)
(31.1) 150 (16.9)
(43.5) 180 (20.3)
(56.5) 250 (28.2)
(73.4) 325 (36.7)
(93.2) 375 (36.7)
(93.2) 375 (42.4)
(113.0) 375 (42.4)
(124.3) 500 (56.5)
(124.3) 600 (67.8)
(N-m)
(5.1)
(11.3)
(13.6)
(16.9)
(22.6)
(31.1)
(42.4)
(56.5)
(67.8)