JYT1078000

Torque Values for Electrical Connections

NOTICE
HAZARD OF ELECTRICAL CONNECTION OVERHEATING
Torque electrical connections to the values recommended in the tables below.
Failure to follow these instructions can result in equipment damage.

Incoming and Plug-on Neutral Lug

Socket Size Across Flats Torque Value lb-in. ( N•m)
1/4 in. 180 (20)
5/16 in. 250 (28)
3/8 in. 340 (38)
1/2 1 450 (51)
1 Certain lugs require 620 (70) and are marked as such.

Multiple Conductor Neutral and/or Ground Bar

Screw Type Lug Wire Range Conductor Size Torque Value lb-in. (N•m)
Slotted Head 14–4 14-10 Cu, 12-10 Al 20 (2)
8 Cu-Al 25 (3)
6-4 Cu-Al 35 (4)
14–1/0 14-8 Cu-Al 36 (4)
6-1/0 Cu-Al 45 (5)
Socket Head 14–1/0 All 100 (11)
6–300 kcmil All 275 (31)
Hardware Description Torque Value lb-in. (N•m)
1/2 in. 720–840 (81–95)
Hardware Description Torque Value lb-in. (N•m)
1/4 in. 50–75 (6–8)
3/8 in. 175–225 (20–25)
1/2 in. 250–350 (28–40)
Hardware Description Torque Value
Conical Washer OD
in. (mm)
Square Head (Tee) Bolt Conical Washer lb-in. (N•m)
  3/8 in.

0.87 (22)

250–280 (28–32)

1.00 (25)

130–150 (15–17)

1/2 in.

1.25 (32)

2.25 (57)

450–550 (51–62)

Hardware Description Torque Value
Conical Washer OD in. (mm) Hex Head Bolt 
(2) Conical Washers lb-in. (N•m)
  5/16 in. 0.90 (23) 145–160 (16–18)
3/8 in. 0.87 (22) 250–280 (28–32)
1.00 (25) 130–150 (15–17)
1/2 in. 1.25 (32)

2.25 (57)

3.00 (76)

720–840 (81–95)
Hardware Description Torque Value lb-in. (N•m)
  1/4 in. 50–75 (6–8)
5/16 in. 80–125 (9–14)
3/8 in. 175–225 (20–25)
1/2 in. 250–350 (28–40)
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