Low Voltage Landscape Lighting,
Metric
Voltage Loss Per Meter Of Cable (One Way Distance, Both Conductors)
Watts
@12V |
WIRE GAUGE AWG and (mm²) |
| 18 (.82) |
16 (1.31) |
12 (3.31) |
10 (5.26) |
8 (8.37) |
| WIRE RESISTANCE (Ohms/meter of cable, both conductors) @ 68 °F (21 °C) |
| 0.0438 |
0.0263 |
0.0102 |
0.0064 |
0.0041 |
| 1 |
0.0037 |
0.0022 |
0.0009 |
0.0005 |
0.0003 |
| 2 |
0.0073 |
0.0044 |
0.0017 |
0.0011 |
0.0007 |
| 3 |
0.0110 |
0.0066 |
0.0026 |
0.0016 |
0.0010 |
| 4 |
0.0146 |
0.0088 |
0.0034 |
0.0021 |
0.0014 |
| 5 |
0.0183 |
0.0110 |
0.0043 |
0.0027 |
0.0017 |
| 6 |
0.0219 |
0.0132 |
0.0051 |
0.0032 |
0.0021 |
| 7 |
0.0256 |
0.0153 |
0.0060 |
0.0037 |
0.0024 |
| 8 |
0.0292 |
0.0175 |
0.0068 |
0.0043 |
0.0027 |
| 9 |
0.0329 |
0.0197 |
0.0077 |
0.0048 |
0.0031 |
| 10 |
0.0365 |
0.0219 |
0.0085 |
0.0053 |
0.0034 |
| 20 |
0.0730 |
0.0438 |
0.0170 |
0.0107 |
0.0068 |
| 30 |
0.1095 |
0.0658 |
0.0255 |
0.0160 |
0.0103 |
| 40 |
0.1460 |
0.0877 |
0.0340 |
0.0213 |
0.0137 |
| 50 |
0.1825 |
0.1096 |
0.0425 |
0.0267 |
0.0171 |
| 60 |
0.2190 |
0.1315 |
0.0510 |
0.0320 |
0.0205 |
| 70 |
0.2555 |
0.1534 |
0.0595 |
0.0373 |
0.0239 |
| 80 |
0.2920 |
0.1753 |
0.0680 |
0.0427 |
0.0273 |
| 90 |
0.3285 |
0.1973 |
0.0765 |
0.0480 |
0.0308 |
| 100 |
0.3650 |
0.2192 |
0.0850 |
0.0533 |
0.0342 |
| note: |
These figures were derived by using Ohm's law and the above values for copper wire resistance.
The distances should be reduced to add safety factor, usually by about 20%, in order to make-up
for losses due to connection deterioration, brownouts, system expansions, etc.
|