User Guide

2-8 Installation MN850
Wire Size and Protection Devices
Table 2-4 Control Wire Sizes and Tightening Torques
Control
Wire Gauge * Terminal Torque
Control
Size
Terminal
AWG mm
2
Lb–in Nm
L1, L2, L3, T1, T2, T3
(M8 Stud for Ring connector)
106 12
1
Earth (Ground) Terminal
(M8 Stud for Ring connector)
1/0 50
106 12
L1, L2, L3, T1, T2, T3
(M8 Stud for Ring connector)
(2)
106 12
2
Earth (Ground) Terminal
(M8 Stud for Ring connector)
(2)
250MCM
(2) 120
106 12
L1, L2, L3, T1, T2, T3
**
(Connector with two M10 holes on 30mm center)
Busbar size:
45x20
212 24
3, 4
Earth (Ground) Terminal
(M10 Stud for Ring connector)
45x20
60x10
80x10
212 24
S0 and S1 14 – 22 0.5 – 2.5 4.5 0.5
X1 and X2 14 – 22 0.5 – 2.5 4.5 0.5
All
K1 (11, 12, 14) 14 – 22 0.5 – 2.5 4.5 0.5
K2 (21, 22, 24) 14 – 22 0.5 – 2.5 4.5 0.5
* Use same gauge wire for Earth ground as is used for L1, L2 and L3.
** Use terminal #4–350kcmil,1 per phase (ILSCO Part No.LO–350–S, LO–600–S or LO–1000–S or equivalent).
Table 2-5 NEC Wire Size and Protection Devices
Control Rating Input Breaker Input Fuse (Amps) Wire Gauge
Amps (Amps)
Fast Acting Time Delay AWG mm
2
9 15 30 20 12 3.31
16 30 50 30 12 3.31
23 40 70 40 10 5.26
30 50 90 60 8 8.37
44 70 150 80 8 8.37
59 90 200 110 6 13.3
85 110 250 150 4 21.2
105 175 350 200 2 33.6
146 250 450 275 2/0 67.4
174 275 600 300 3/0 85.0
202 300 600 350 4/0 107.0
242 400 750 450 250MCM 127.0
300 450 900 600 350MCM 177.0
370 600 1200 700 500MCM 253.0
500 800 1500 900 (2) 250MCM (2) 127.0
600 900 1800 1100 (2) 350MCM (2) 177.0
750 1200 2500 1400 (2) 500MCM (2) 253.0
900 1400 3000 1600 (2) 700MCM (2) 355.0
1100 1600 2000 (3) 700MCM (3) 355.0
1200 1800 2000 (3) 700MCM (3) 355.0
Note: All wire sizes are based on 75°C copper wire. Higher temperature smaller gauge wire may be used per NEC
and local codes. Recommended fuses/breakers are based on 40°C ambient, maximum continuous control
output current and no harmonic current.