Reference information for the Wire Parameter Calculator at

http://circuitcalculator.com/wordpress/2007/09/20/wire-parameter-calculator/

Wire And Cable Derating Criteria From MIL-STD-975

Wire Size (AWG)	Derated Current (Amperes)
	Single Wire	Bundled Wire or Cable
30	1.3	0.7
28	1.8	1.0
26	2.5	1.4
24	3.3	2.0
22	4.5	2.5
20	6.5	3.7
18	9.2	5.0
16	13.0	6.5
14	19.0	8.5
12	25.0	11.5
10	33.0	16.5
8	44.0	23.0
6	60.0	30.0
4	81.0	40.0
2	108.0	50.0
0	147.0	75.0
00	169.0	87.5

Notes:

1. Derated current ratings are based on an ambient temperature of 70°C or less in a hard vacuum of 1E-6 torr.

2. The derated current ratings are for 200°C rated wire, such as Teflon Ô insulated (Type PTFE) wire, in a hard vacuum of 1E-6 torr.

a. For 150°C wire, use 80% of value shown in Table 16.

b. For 135°C wire, use 70% of value shown in Table 16.

c. For 105°C wire, use 50% of value shown in Table 16.

3. The current rating for bundles or cables are based on bundles of 15 or more wires. For smaller bundles, the allowable current shall be determined by IBW = ISW x (29-N)/28 where N = number of wires, IBW = current, bundled wire and ISW = current, single wire.