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Think about line voltage drop before you select wire gauges. Select wire gauges that drop the voltage by 2% or less of
the rated voltage. Increase the wire gauge and the cable length when the risk of voltage drop increases. Calculate line
voltage drop with this formula:
Line voltage drop (V) =
Wire Gauge and Torque Specifications for UL Listing
WARNING
Electrical Shock Hazard. Make sure that the protective ground wire complies with technical standards and local
safety regulations. The IEC/EN 61800-5-1:2007 standard specifies that you must wire the power supply to automatically de-
energize when the protective ground wire disconnects. You can also connect a protective ground wire that has a minimum cross-
sectional area of 10mm
2
(copper wire) or 16 mm
2
wire of 10 mm
or more, install two protective ground wires that have the same cross-sectional area. If you do not obey the
standards and regulations, it can cause serious injury or death. The leakage current of the drive will be more than 3.5 mA.
Refer to
Three-Phase 208 V Class Wire Gauges and Torques on page 27
and Torques on page 29
for the recommended wire gauges and tightening torques of the main circuit terminals.
Note:
The recommended wire gauges are based on drive continuous current ratings with 75 °C (167 °F) 600 V class copper wire. Assume these
conditions:
• Ambient temperature: 40 °C (104 °F) or lower
• Wiring distance: 100 m (3281 ft) or shorter
• Normal Duty Rated current value
Screw Shapes
Icon
Three-Phase 208 V Class Wire Gauges and Torques
Model
Terminals
*1
R/L1, S/L2, T/L3
2011
U/T1, V/T2, W/T3
R/L1, S/L2, T/L3
2017
U/T1, V/T2, W/T3
R/L1, S/L2, T/L3
2024
U/T1, V/T2, W/T3
YASKAWA TOEPC7106171GA FP605 Drive Installation & Primary Operation
× wire resistance (Ω/km) × wiring distance (m) × motor rated current (A) × 10
2
(aluminum wire). For drive models on which you cannot use a protective ground
Table 7.2 Icons to Identify Screw Shapes
Screw Shape
Phillips/slot combo (+/-)
Slotted (-)
Pozidriv #2
Hex bolt (cross-slotted)
Applicable Gauge
Recommended Gauge
AWG, kcmil
AWG, kcmil
(mm
14 - 8
14
(2.5 - 10)
14 - 8
14
(2.5 - 10)
14 - 8
12
(2.5 - 10)
14 - 8
12
(2.5 - 10)
14 - 8
10
(2.5 - 10)
14 - 8
10
(2.5 - 10)
14 - 4
10
(2.5 - 25)
14 - 8
8
(2.5 - 10)
14 - 8
10
(2.5 - 10)
and
Three-Phase 480 V Class Wire Gauges
Icon
Wire Stripping Length
mm
*2
2
)
9 - 10
10
-
9 - 10
10
-
AWG 14 - AWG 10:
13 - 14.5
AWG 8 - AWG 4:
*4
10 - 12
10
-
7 Electrical Installation
-3
Screw Shape
Hex bolt (slotted)
Hex self-locking nut
Hex socket cap (WAF: 4 mm)
Hex bolt and hex self-locking nut
*3
Terminal Screw
Tightening Torque
Size and Shape
N∙m (lbf∙in)
M3.5
1.5 - 1.7
M4
(13.5 - 15)
2.0 - 2.5
M5
(17.7 - 22.1)
M3.5
1.5 - 1.7
M4
(13.5 - 15)
2.0 - 2.5
M5
(17.7 - 22.1)
M5
1.5 - 1.7
M4
(13.5 - 15)
2.0 - 2.5
M5
(17.7 - 22.1)
.
0.8
(7.0)
0.8
(7.0)
2.0
(18.0)
27
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