How Many Amps Can 20 Gauge Wire Handle

The AWG - American Wire Approximate - is used as a standard method denoting wire diameter, measuring the diameter of the conductor (the blank wire) with the insulation removed. AWG is sometimes likewise known as Brownish and Sharpe (B&Due south) Wire Judge.

The AWG tabular array beneath is for a unmarried, solid, circular conductor. Considering of the small gaps between the strands in a stranded wire, a stranded wire with the same current-conveying chapters and electrical resistance as a solid wire, e'er accept a slightly larger overall bore.

The higher the number - the thinner the wire. Typical household wiring is AWG number 12 or 14. Telephone wire is typical AWG 22, 24, or 26.

The table below indicates the electric current ratings of PVC-insulated single and multicore wiring cables. Be aware that the current load depends on installation method - the enclosure - and how well the resistance heat is removed from the cable. Operating temperature of the conductor, ambience temperature and type of conductor insulation is important. E'er check the articles data earlier detailed engineering.

For full table with Unmarried Core and Multi Cadre Current Ratings - rotate the screen!

AWG	Diameter (mm)	Diameter (in)	Square (mm2)	Resistance Copper (ohm/1000m)	Resistance Aluminum (ohm/1000m)	Typical Max. Current Load Ratings - Copper (amps) 1)
						Unmarried Core	Multicore
							up to 3 cores	4 - 6 cores	7 - 24 cores	25 - 42 cores	43 and above
40	0.08	.	0.0050	3448	5300
39	0.09	.	0.0064	2693	4141
38	0.ten	0.0040	0.0078	2210	3397
37	0.11	0.0045	0.0095	1810	2789
36	0.13	0.0050	0.013	1326	2038
35	0.14	0.0056	0.015	1120	1767
34	0.sixteen	0.0063	0.020	862	1325
33	0.18	0.0071	0.026	663	1019
32	0.20	0.0080	0.031	556	855
thirty	0.25	0.010	0.049	352	541
28	0.33	0.013	0.080	216	331
27	0.36	0.014	0.096	180	276
26	0.41	0.016	0.13	133	204
25	0.45	0.018	0.16	108	166
24	0.51	0.020	0.20	88	133	3.5	2	1.6	1.iv	ane.two	1.0
22	0.64	0.025	0.33	52	lxxx	five.0	iii	two.four	two.1	1.8	1.5
xx	0.81	0.032	0.50	34	53	6.0	5	4.0	three.v	3.0	2.5
18	1.0	0.040	0.82	21	32	9.5	7	5.six	four.9	iv.2	3.v
16	1.3	0.051	1.3	13	20	15	10	8.0	7.0	6.0	5.0
14	1.six	0.064	2.1	viii.2	xiii	24	15	12	10	ix.0	vii.5
13	1.viii	0.072	2.6	six.6	10
12	2.1	0.081	3.3	5.2	8.0	34	20	16	14	12	ten
10	2.vi	0.10	5.3	3.three	5.0	52	30	24	21	eighteen	15
8	3.3	0.thirteen	8.iii	ii.i	three.2	75	twoscore	32	28	24	20
6	4.1	0.17	xiii.3	i.3	2.0	95	55	44	38	33	27
4	5.2	0.20	21.ii	0.81	1.3	120	70	56	49	42	35
3			26.vii	0.65	0.99	154	lxxx	64	56	48	twoscore
2	6.five	0.26	33.6	0.51	0.79	170	95	76	66	57	57
1	seven.4	0.29	42.iv	0.41	0.63	180	110	88	77	66	55
0 (ane/0)	eight.3	0.33	53.v	0.32	0.l	200
00 (two/0)	9.three	0.37	67.4	0.26	0.39	225
000 (three/0)	10.four	0.41	85.0	0.20	0.32	275
0000 (four/0)	11.7	0.46	107	0.16	0.25	325
250			127			345
300			152			390
400			178			415

¹⁾ Current ratings for up to m V, PVC-insulated single and multicore wiring cables, ambient temperature up to 30^oC

Download and print AWG chart

Values for resistance are based on electric resistivity for copper 1.724 x ten^-8 Ω m (0.0174 μΩ m) and electric resistivity for aluminum 2.65 x 10^-8 Ω chiliad (0.0265 μΩ m).

• prefixes

The higher the judge number, the smaller the bore, and the thinner the wire.

Considering of less electrical resistance a thicker wire carries more current with less voltage driblet than a thinner wire. For longer distances information technology may be necessary to increase wire bore - reducing the gauge - to limit voltage drop.

Correction-factors at ambient temperature above 30^oC

• ambient temperature 31 - xl ^oC: correction factor = 0.82
• ambience temperature 41 - 45 ^oC: correction factor = 0.71
• ambient temperature 45 - l ^oC: correction cistron = 0.58

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Source: https://www.engineeringtoolbox.com/wire-gauges-d_419.html