Boatbuilder's Handbook

TABLE 5A

Allowable Amperage of Conductors of 50 Volts or More When No More Than 2 Conductors are Bundled

	No More Than 2 Conductors Are Bundled For 50 Volts and Over
	Temperature Rating Of Conductor Insulation
Conductor Size (AWG)	60¡C (140¡F)		75¡C (167¡F)		80¡C (176¡F)		90¡C (194¡F)		105¡C (221¡F)		125¡C (257¡F)		200¡C (392¡F)
Conductor Size (AWG)	Outside Engine Spaces	Inside Engine Spaces	Outside Engine Spaces	Inside Engine Spaces	Outside Engine Spaces	Inside Engine Spaces	Outside Engine Spaces	Inside Engine Spaces	Outside Engine Spaces	Inside Engine Spaces	Outside Engine Spaces	Inside Engine Spaces	Outside or Inside Engine Spaces
18	10	5.8	10	7.5	15	11.7	20	16.4	20	17.0	25	22.3	25
16	15	8.7	15	11.3	20	15.6	25	20.5	25	21.3	30	26.7	35
14	20	11.6	20	15.0	25	19.5	30	24.6	35	29.8	40	35.6	45
12	25	14.5	25	18.8	35	27.3	40	32.8	45	38.3	50	44.5	55
10	40	23.2	40	30.0	50	39.0	55	45.1	60	51.0	70	62.3	70
8	55	31.9	65	48.8	70	54.6	70	57.4	80	68.0	90	80.1	100
6	80	46.4	95	71.3	100	78.0	100	82.0	120	102.0	125	111.3	135
4	105	60.9	125	93.8	130	101.4	135	110.7	160	136.0	170	151.3	180
3	120	69.6	145	108.8	150	117.0	155	127.1	180	153.0	195	173.6	210
2	140	81.2	170	127.5	175	136.5	180	147.6	210	178.5	225	200.3	240
1	165	95.7	195	146.3	210	163.8	210	172.2	245	208.3	265	235.9	280
0	195	113.1	230	172.5	245	191.1	245	200.9	285	242.3	305	271.5	325
00	225	130.5	265	198.8	285	222.3	285	233.7	330	280.5	355	316.0	370
000	260	150.8	310	232.5	330	257.4	330	270.6	385	327.3	410	364.9	430
0000	300	174.0	360	270.0	385	300.3	385	315.7	445	378.3	475	422.8	510

There is NO limit on conductors in a bundle for under 50 volts.