Cut Sheet
9
Technical Data TD01701001E
Effective March 2017
UL low-voltage busway
Pow-R-Way III
EATON www.eaton.com
Electrical data (continued)
Line-to-line voltage drop
The table below gives average three-phase voltage drop per 100 ft
(30.5 m) at rated current and varying power factor. Line-to-neutral
voltage drop is obtained by multiplying the line value by 0.577.
Table 11. Line-to-line voltage drop
UL 857
ampere rating
Percent power factor
0 10 20 30 40 50 60 70 80 90 100
Copper
225 0.47 0.56 0.64 0.72 0.79 0.85 0.91 0.96 1.00 1.01 0.90
400 0.83 0.99 1.14 1.27 1.40 1.52 1.62 1.71 1.78 1.80 1.60
600 1.25 1.48 1.70 1.91 2.10 2.28 2.44 2.57 2.66 2.70 2.39
800 1.67 1.98 2.27 2.55 2.80 3.04 3.25 3.42 3.55 3.60 3.19
1000 1.65 1.93 2.20 2.45 2.68 2.88 3.07 3.21 3.32 3.34 2.91
1200 1.62 1.90 2.17 2.42 2.65 2.86 3.04 3.19 3.30 3.32 2.91
1350 1.54 1.82 2.08 2.32 2.54 2.75 2.93 3.08 3.18 3.21 2.82
1600 1.40 1.65 1.90 2.12 2.33 2.52 2.69 2.84 2.94 2.97 2.62
2000 1.35 1.61 1.85 2.08 2.29 2.49 2.66 2.81 2.92 2.96 2.63
2500 1.16 1.39 1.62 1.83 2.02 2.20 2.37 2.51 2.62 2.66 2.40
3200 1.73 1.98 2.22 2.44 2.64 2.81 2.96 3.07 3.14 3.12 2.63
4000 1.68 1.93 2.17 2.39 2.59 2.77 2.92 3.04 3.11 3.10 2.63
5000 1.44 1.67 1.89 2.09 2.28 2.44 2.59 2.71 2.78 2.79 2.40
Aluminum
225 0.46 0.63 0.79 0.95 1.10 1.25 1.39 1.52 1.64 1.74 1.71
400 0.81 1.11 1.40 1.69 1.96 2.22 2.47 2.71 2.92 3.09 3.04
600 1.22 1.67 2.11 2.53 2.94 3.33 3.71 4.06 4.38 4.63 4.56
800 1.38 1.74 2.09 2.42 2.74 3.04 3.32 3.57 3.79 3.93 3.70
1000 1.46 1.85 2.22 2.58 2.93 3.25 3.55 3.82 4.05 4.21 3.98
1200 1.34 1.70 2.04 2.37 2.69 2.99 3.26 3.52 3.73 3.87 3.66
1350 1.16 1.48 1.79 2.08 2.37 2.63 2.88 3.11 3.30 3.44 3.26
1600 1.21 1.55 1.88 2.20 2.50 2.79 3.05 3.30 3.50 3.65 3.47
2000 1.18 1.53 1.87 2.19 2.50 2.79 3.06 3.31 3.53 3.69 3.52
2500 1.20 1.50 1.79 2.06 2.33 2.58 2.81 3.01 3.18 3.30 3.08
3200 1.35 1.69 2.01 2.33 2.62 2.90 3.16 3.39 3.59 3.71 3.48
4000 1.32 1.66 2.00 2.31 2.62 2.90 3.17 3.41 3.61 3.75 3.53
ote:N Voltage drop = √3 I (R cos ø + X sin ø) Volts/100 ft (30.5 m)—concentrated load, where cos ø = power factor.
ote:N For plug-in distributed loads, divide the voltage drop by 2. See IEEE Standard 141-13-8.3.
ote:N Actual voltage drop for loads less than full rated current and different lengths may be calculated by multiplying the values from Table 11 by
(actual/rated current) x (actual length/100 ft [30.5 m]).