Wire Sizing Chart

When wiring your bike with additional lights or other electrical load, it is important to use the proper size wire. Too thin a wire will cause a loss of voltage at the termination end since the resistance of the wire is too high. It is also a fire hazard due to overheating or improper fusing. Always use wire properly suited to the application.

The wire sizing guide below shows the length of wire (feet) that will cause a 5% voltage drop at a given current. The relationships are linear. That means if you want to limit the voltage drop by some other amount, say 2%, then divide the length by 2.5.

	WIRE GUAGE
Amps		14	12	10	8	6	4	2	1	0	00	000	0000
1		106	169	269	427	679	1080	1717	2166	2730	3444	4342	5475
2		53	85	134	214	340	540	859	1083	1365	1722	2171	2738
4		27	42	67	107	170	270	429	542	682	861	1086	1369
6		18	28	45	71	113	180	286	361	455	574	724	913
8		13	21	34	53	85	135	215	271	341	430	543	684
10		11	17	27	43	68	108	172	217	273	344	434	548
15		7	11	18	28	45	72	114	144	182	230	289	365
20		—	8	13	21	34	54	86	108	136	172	217	274
25		—	—	11	17	27	43	69	87	109	138	174	219
30		—	—	9	14	23	36	57	72	91	115	145	183
35		—	—	—	12	19	31	49	62	78	98	124	156
40		—	—	—	—	17	27	43	54	68	86	109	137
45		—	—	—	—	15	24	38	48	61	77	96	122
50		—	—	—	—	14	22	34	43	55	69	87	110

Last update: 05:00 PM Sunday, September 26, 2004

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