Test current per UL 486 for connectors intended for a single conductor, amperes

Conductor Size Assigned maximum Static-heating
AWG or kcmil mm2 ampere rating test current
28 0.08 - 3.5
26 0.13   3.5
24 0.20   7
22 0.324   9
20 0.519 - 12
18 0.823   17
16 1.31 - 18
14 2.08 15 [20]30
12 3.31 20 [25]35
10 5.261 30 [40]50
8 8.367 50 70
6 13.30 65 95
4 21.15 85 125

Static Heating & Heat-Cycling test currents per UL 1659 for conductors

Wire Size Static Heating Test Heat-Cycling Test
Wire Size
AWG		 mm2 current amperes current amperes
18 0.82 10 20
16 1.3 13 25
14 2.1 18 32
12 3.3 25 37
10 5.3 30 45

Test Current per UL 310 for connectors intended for internal wiring

Wire Size Temperature Heat-Cycling
AWG mm2 0.110, 0.125 inch
(2.8mm), (3.2mm) terminals		 All others 0.110, 0.125 inch terminals
(2.8mm), (3.2mm)		 All other
22 0.32 2 3 4 6
20 0.52 3 4 6 8
8 0.82 4 7 8 14
16 1.3 5 10 10 20
14 2.1   15   30
12 3.3   20   40
10 5.3   24   48