Procedure

Use the recommended wire size in accordance with local, national, and regional
regulations to determine the electrical resistance of the wire (R) according to
Table 1.
Table 1. Electrical Resistance by Wire Size Recommended Wire Size^{1} Electrical Resistance of Wire (milliohms/meter) 25 mm^{2} 0.727 21.2 mm^{2} (4 AWG) 0.815 16 mm 1.15 13.3 mm^{2} (6 AWG) 1.30 10 mm^{2} 1.83 8.3 mm^{2} (8 AWG) 2.06 6 mm^{2} 3.08 5.3 mm^{2} (10 AWG) 3.28 4 mm^{2} 4.61 3.3 mm^{2} (12 AWG) 5.21 2.5 mm^{2} 7.41 2 mm^{2} (14 AWG) 8.28 1.5 mm^{2} 12.1  Find the rated voltage (V) and maximum output current (I) from the rating plate on the selected VFD68 Drive.

Use Figure 1 to determine the maximum recommended wiring length for the
VFD68 Drive.
Figure 1. Maximum Wire Length Calculation
Note: If the maximum wire length needs to be extended, select a larger wire size and recalculate the maximum wire length. Do not exceed 100 m.Note: Maximum wiring length is also affected by the setting of P. 72. See PWM Frequency, Audible Motor Noise, and EMI.Example:
Given a VFD68BGG2C model, what is the maximum wiring length?
 Table 1 indicates that a VFD68BGG2C model is a 230 VAC Drive, rated for 1.49 kW (2 HP).
 The rating information plate (Figure 1) for that model indicates that the VFD68BGG Drive has a voltage rating of 230 VAC and a maximum output rating of 7 amperes.
 Table 1 gives the recommended wire size as 14 AWG.
 Table 1 shows 14 AWG size wire as having an electrical resistance of 8.28 milliohms/meter.

Using the equation in Figure 1 and using the values we found in the steps
above:
(11.5 * 230) / (7 * 8.28) = 2656.6 / 57.96 = 45.8
The maximum wire length is 45.8 meters.
^{1} The mm
wire sizes that are given as equivalences to the AWG
wire sizes are not commercially
available.