Kohler Generator Sets 20--2800 kW User Manual download pdf (Page 49)

TP-5700 7/93 37Section 7 Electrical Requirements

7.4 Terminal Connector Torque

Use the torque values shown in Figure 7-4 or Figure 7-5

for terminal connectors. Refer to UL-486A, UL-486B,

and UL-486E for information on terminal connectors for

aluminum and/or copper conductors. See Section 7.2,

Electrical Connections, for information on the

temperature rating of customer-supplied wire. Comply

with applicable national and local codes when installing

a wiring system.

Note: If a connector has a clamp screw such as a

slotted, hexagonal head screw with more than

one means of tightening, test the connector using

both applicable torque values provided in

Figure 7-4.

Tightening Torque, Nm (in. lb.)

Wire Size for Unit

Connection

Slot Head 4.7 mm (No. 10) or Larger*

Hexagonal Head—External

Drive Socket Wrench

AWG, kcmil (mm

)

Slot Width <1.2 mm (0.047 in.)

Slot Length <6.4 mm (0.25 in.)

Slot Width >1.2 mm (0.047 in.)

Slot Length >6.4 mm (0.25 in.)

Split-Bolt

Connectors

Other

Connections

18--10 (0.82--5.3) 2.3 (20) 4.0 (35) 9.0 (80) 8.5 (75)

8 (8.4) 2.8 (25) 4.5 (40) 9.0 (80) 8.5 (75)

6--4 (13.3--21.2) 4.0 (35) 5.1 (45) 18.6 (165) 12.4 (110)

3 (26.7) 4.0 (35) 5.6 (50) 31.1 (275) 16.9 (150)

2 (33.6) 4.5 (40) 5.6 (50) 31.1 (275) 16.9 (150)

1 (42.4) — 5.6 (50) 31.1 (275) 16.9 (150)

1/0--2/0 (53.5--67.4) — 5.6 (50) 43.5 (385) 20.3 (180)

3/0--4/0 (85.0--107.2) — 5.6 (50) 56.5 (500) 28.2 (250)

250--350 (127--177) — 5.6 (50) 73.4 (650) 36.7 (325)

400 (203) — 5.6 (50) 93.2 (825) 36.7 (325)

500 (253) — 5.6 (50) 93.2 (825) 42.4 (375)

600--750 (304--380) — 5.6 (50) 113.0 (1000) 42.4 (375)

800--1000 (406--508) — 5.6 (50) 124.3 (1100) 56.5 (500)

1250--2000 (635--1016) — — 124.3 (1100) 67.8 (600)

* For values of slot width or length not corresponding to those specified, select the largest torque value associated with the conductor size.

Slot width is the nominal design value. Slot length is to be measured at the bottom of the slot.

Note: If a connector has a clamp screw such as a slotted, hexagonal head screw with more than one means of tightening, test the connector

using both applicable torque values.

Figure 7-4 Tightening Torque for Screw-Type Pressure Wire Connectors

Socket Size Across Flats,

mm (in.)

Tightening Torque,

Nm (in. lb.)

3.2 (1/8) 5.1 (45)

4.0 (5/32) 11.4 (100)

4.8 (3/16) 13.8 (120)

5.6 (7/32) 17.0 (150)

6.4 (1/4) 22.6 (200)

7.9 (5/16) 31.1 (275)

9.5 (3/8) 42.4 (375)

12.7 (1/2) 56.5 (500)

14.3 (9/16) 67.8 (600)

Note: For values of slot width or length not corresponding to

those specified, select the largest torque value associated

with the conductor size. Slot width is the nominal design

value. Slot length is to be measured at the bottom of the

slot.

Figure 7-5 Tightening Torque for Pressure Wire

Connectors with Internal-Drive

Socket-Head Screws

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 55 56

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Kohler Generator Sets 20--2800 kW User Manual Page 49

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