Section 9—Torque Values for Electrical Connections
Power-Style™ QED-2 Switchboards
51
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Section 9—Torque Values for Electrical Connections
Table 6 –
Incoming, Branch, and Neutral Lug
Socket Size Across Flats
Torque Value
1/4 in.
180 lb-in
(20 N•m)
5/16 in.
250 lb-in
(28 N•m)
3/8 in.
340 lb-in
(38 N•m)
1/2 in.
★
450 lb-in
(51 N•m)
★
Certain lugs require 620 lb-in (70 N•m) and are marked as such.
Table 7 –
Multiple Conductor Neutral and/or Ground Bar
Screw Type
Lug Wire Range
Conductor Size
Torque Value
Slotted Head
14–4
14-10 Cu, 12-10 Al
20 lb-in
(2 N•m)
8 Cu-Al
25 lb-in
(3 N•m)
6-4 Cu-Al
35 lb-in
(4 N•m)
14–1/0
14-8 Cu-Al
36 lb-in
(4 N•m)
6-1/0 Cu-Al
45 lb-in
(5 N•m)
Socket Head
14–1/0
All
100 lb-in
(11 N•m)
6–300 kcmil
All
275 lb-in
(31 N•m)
