Wire Loss Tables

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Wire Loss Tables

All of the tables below assume a loss of 3%

In all of the tables below the "Red" rows indicate wire size, the "Blue" columns indicate amps, the "Green" columns are for watts, and the "Gray" boxes are distance in feet. To determine the correct wire size you must know the one way distance and the current (amps or watts).

Example: You want to transmit 16 amps at 12 volts a distance of 180'. Using the 12 volt wire loss table, find 16 amps in the far Left (Blue) column. Draw an imaginary line to the right until you come to 180. Then draw an imaginary line straight up and you will see a "Red" box with 4/0 AWG in it. This example is shown in "White" in the 12 volt wire loss table. So to transmit 16 amps @ 12 volts a distance of 180' you will need two 4/0 AWG conductors (1 positive and 1 Negative) 180 feet long.

12 Volt Wire Loss Table

24 Volt Wire Loss Table

48 Volt Wire Loss Table

120 Volt Table

12 Volt Wire Loss Table

12 Volt	Wire Size	14 AWG	12 AWG	10 AWG	8 AWG	6 AWG	4 AWG	3 AWG	2 AWG	1 AWG	1/0 AWG	2/0 AWG	3/0 AWG	4/0 AWG
Amps	Watts
0.5	6	110	175	279	445	706	1121	1417	1791	2250	2834	3564	4517	5750
1	12	55	88	139	222	353	561	708	895	1125	1417	1782	2258	2875
2	24	27	44	70	111	176	280	354	447	562	708	891	1129	1437
10	120	9	14	22	27	35	56	70	89.5	112	141	178	225	287
16	192		5.5	8.7	14	22	35	44.3	56	70	88	111	141	180
20	240		4.4	7	11	17	28	35	44.8	62	70.8	89	113	143
30	360			4.6	7.5	11.5	18.7	23	29.8	37	47	59	75	95
40	480				5.5	8.8	14	17.7	22.4	28	35	44.5	56	72
50	600					7	11.2	14	18	22.5	28	35	45	57
60	720						9	11.8	15	18	23	30	37	48
100	1200									11	14	17.8	22.6	28
130	1560											13.7	17	22
150	1800												15	19
170	2040													17

24 Volt Wire Loss Table

24 Volt	Wire Size	14	12	10	8	6	4	3	2	1	1/0	2/0	3/0	4/0
Amps	Watts
0.5	12	221	351	558	890	1412	2243	2834	3582	4500	5669	7128	9034	11501
1	24	110	175	279	445	706	1122	1417	1791	2250	2834	3564	4517	5751
2	48	55	88	139	222	353	561	709	895	1125	1417	1782	2258	2875
10	240	11	17	28	44	70.6	112	141	179	225	283	356	452	575.1
16	384		11	17	28	44.1	70.1	88	112	140	177	223	282	359.4
20	480		9	14	22	35.3	56.1	70.9	89.6	122	141	178	226	287.5
30	720			9.3	15	23.5	37.4	47.2	59.7	75	94.5	118	150	191.7
40	960				11	17.6	28	35.4	44.8	56.2	70.9	89.1	113	143.8
50	1200					14.1	22.4	28.3	35.8	45	56.7	71.3	90.3	115
60	1440						18.7	23.6	29.9	37.5	47.2	59.4	75.3	95.8
100	2400									22.5	28.3	35.6	45.2	57.5
130	3120											27.4	34.7	44.2
150	3600												30.1	38.3
170	4080													33.8

48 Volt Wire Loss Table

48 Volt	Wire Size	14	12	10	8	6	4	3	2	1	1/0	2/0	3/0	4/0
Amps	Watts
0.5	24	442	702	1116	1780	2824	4486	5668	7164	9000	11338	14256	18068	23002
1	48	223	351	558	890	1412	2244	2834	3582	4500	5668	7128	9034	11502
2	96	110	175	279	445	706	1121	1417	1791	2250	2834	3564	4516	5750
10	480	22	35	56	109	141	224	283	358	450	567	712.8	904	1150
16	768		22	34.8	55.6	88	140	177	223	281	354	445.6	564	718.8
20	960		17	28	44.4	70.6	112	142	179	245	283	356	452	575
30	1440			18.6	29.6	47	74.8	94.4	113	150	189	236.4	300	383.4
40	1920				22.2	35.2	56	70.8	89	112	142	178.2	226	287.6
50	2400					28.2	44.8	56.6	71	90	113	142.6	180.6	230
60	2880						37.4	47.2	60	75	94.4	118.8	150.6	191.6
100	4800									45	56.6	71.2	90.4	115
130	6240											27.4	34.7	44.2
150	7200												30.1	38.3
170	8160													33.8

120 Volt Wire Loss Table

120 Volt	Wire Size	14	12	10	8	6	4	2	1/0	2/0	3/0
Amps	Watts
2	240	422	656
4	480	187	328	516
6	720	141	225	328	562
8	960	103	159	272	422	665
10	1200	84	131	216	337	534
15	1800	56	84	131	225	356	74.8	562
20	2400		65	103	118	272	422	675
25	3000			84	131	216	337	543
30	3600			65	112	178	281	450	722
40	4800				84	131	216	337	543	675
50	6000					103	171	272	431	543	684
60	7200

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