Current Capacity of straight nickel chromium wire

Current Carrying Capacity of Straight Nickel Chromium Wire
Approximate Amperes to heat a straight, oxidized wire in quiet air to given temperature

Degrees F		400	600	800	1000	1200	1400
Degrees C		205.	315	427	538	649	760
A.W.G. or B. & S.	Inches Dia.	Amperes
15	.057	7.2	10.0	12.8	16.1	20.0	24.5
16	.051	6.4	8.7	10.9	13.7	17.0	20.9
17	.045	5.5	7.5	9.5	11.7	14.5	17.6
18	.040	4.8	6.5	8.2	10.1	12.2	14.8
19	.036	4.3	5.8	7.2	8.7	10.6	12.7
20	.032	3.8	5.1	6.3	7.6	9.1	11.0
21	.0285	3.3	4.3	5.3	6.5	7.8	9.4
22	.0253	2.9	3.7	4.5	5.6	6.8	8.2
23	.0226	2.58	3.3	4.0	4.9	5.9	7.0
24	.0201	2.21	2.9	3.4	4.2	5.1	6.0
25	.0179	1.92	2.52	3.0	3.6	4.3	5.2
26	.0159	1.67	2.14	2.60	3.2	3.8	4.5
27	.0142	1.44	1.84	2.25	2.73	3.3	3.9
28	.0126	1.24	1.61	1.95	2.38	2.85	3.4
29	.0113	1.08	1.41	1.73	2.10	2.51	2.95
30	.0100	.92	1.19	1.47	1.78	2.14	2.52
31	.0089	.77	1.03	1.28	1.54	1.84	2.17
32	.0080	.68	.90	1.13	1.36	1.62	1.89
33	.0071	.59	.79	.97	1.17	1.40	1.62
34	.0063	.50	.68	.83	1.00	1.20	1.41
35	.0056	.43	.57	.72	.87	1.03	1.21
36	.0050	.38	.52	.63	.77	.89	1.04
37	.0045	.35	.46	.57	.68	.78	.90
38	.0040	.30	.41	.50	.59	.68	.78
39	.0035	.27	.36	.42	.49	.58	.66
40	.0031	.24	.31	.36	.43	.50	.57

Current Carrying Capacity of Ribbon Nickel Chromium Wire
At 1200�F approximate

.	Width-Inches
Thickness Inches	1/64	1/32	1/16	3/32	1/8	3/16
.	Amps
.0063	1.56	2.89	5.5	8.2	10.1	16.6
.0056	1.45	2.69	5.2	7.2	9.5	15.6
.0050	1.35	2.52	4.9	6.8	9.0	14.7
.0045	1.26	2.38	4.6	6.4	8.5	14.0
.0040	1.18	2.23	4.1	6.0	8.0	13.1
.0035	1.09	2.07	3.8	5.6	7.5	12.3
.0031	1.01	1.94	3.6	5.3	7.0	11.5
.0020	---	---	---	---	---	---
.0015	4	---	---	---	---	---