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26 Equipment Inspection and Start-Up
Table 5 Torque Specifications (Unless Otherwise Labeled)
A. Nut and Bolt Combinations
Bolt
Shaft Size
Grade 2
Standard
Electrical Connections
with Belleville Washers
lb-in N-m lb-in N-m
1/4 53 6.0 46 5.2
5/16 107 12.1 60 6.8
3/8 192 21.7 95 10.7
1/2 528 60.0 256 28.9
B. Main Input and Main Output Circuit Breakers
Breaker Size
Wire
Size
Compression Lug
lb-in N-m
Up to 110 Amp #14 - #10
#8 - #3
#2 - #3/0
35
100
150
4.0
11.4
17.1
125 to 250 Amp #3 - #1
#1/0 - 350 kcmil
200
275
22.8
31.3
300 to 800 Amp #2 - 600 kcmil 375 42.7
C. Panelboard Main Circuit Breaker
lb-in N-m
Busbar-to-Breaker 90 10.2
Compression Lug 250 28.5
D. Branch Circuit Breakers
lb-in N-m
Up to 30 Amp 35 4.0
40 to 100 Amp 45 5.1
E. Terminal Block Compression Lug
AWG Wire Size or Range lb-in N-m
#14 - #10 35 4.0
#8 40 4.5
#6 - #00 120 13.6
#6 - 350 kcmil 275 31.1
#4 - 500 kcmil 375 42.4