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# Difference between revisions of "Wire length tables"

## Introduction

Describe wire length, voltage loss, etc. here.

## Tables

The following table shows the American Wire Gauge (AWG) size for several different round trip (RT) wire lengths based on maximum current (A) for a 12V DC system (assuming 3% maximum wire loss):

RT length 5A 10A 15A 20A 25A 30A 40A 50A
15 ft 16 12 10 10 8 8 6 6
20 ft 14 12 10 8 8 6 6 4
25 ft 14 10 8 8 6 6 4 4
30 ft 12 10 8 6 6 4 4 2
40 ft 12 8 6 6 4 4 2 2
50 ft 10 8 6 4 4 2 2 1
60 ft 10 6 4 4 2 2 1 1/0
70 ft 8 6 4 2 2 2 1/0 2/0
80 ft 8 6 4 2 2 1 1/0 2/0
90 ft 8 4 2 2 1 1/0 2/0 3/0

This table was adapted from https://www.engineeringtoolbox.com/amps-wire-gauge-d_730.html .

## Calculating Wire Sizes

1. copper wire resistivity = 11.2
2. 3% loss from wires
3. allowable voltage drop = 0.36V
• 12V system, 3% (0.03) wire loss -> 12V x 0.03 = 0.36V

The following equation was used, rearranged, and iterated on to produce the above table:

Eqn. 1

Algebraically rearrange Eqn. 1 to solve for n. The resulting equation is Eqn. 2 below:

Eqn. 2
Eqn. 3
Eqn. 4

See Help:Tables.

Use help:references to see how to use the reference format.[1]

Use Help:Images on how to upload the graph image(s). Please remember to use a very descriptive name for the file.

## References

1. It is quite easy and just relies on ref and /ref in between less than and greater than symbols.