Page 604 - Wago_Rail-MountedTerminalBlockSystems_Volume1_2015_US.pdf

14 UL Specifications – Underwriters Laboratories, USA (continued)

602 Tests and Testing Procedures per UL Standards (continued)

• Heat Cycling Test to UL 1059, UL 486 C, UL 486 E
Tests performed:
to UL 1059 to UL 486 C (splicing wire connectors),
UL 486 E (equipment wiring terminals)

Test performed with maximum rated cross sectional area Test performed with maximum rated cross sectional area
Test current: 150% of the max. rated current Test current: increased test current to UL 486 C, Table 6
UL 486 E, Table 4

84 cycles of: 3 1/2 h “ON” / 1/2 h “OFF” 500 cycles of: 1 h “ON” / 1 h “OFF”
1 1/2 h “ON” / 1 1/2 h “OFF”
(from AWG 4/0 up to 400 kcmil per UL 486 E)
The temperature rise is measured after the first and the 84th The temperature rises at the terminal blocks and control wires
cycle. are measured and recorded after: 1, 25, 50, 75, 100, 125,
175, 225, 275, 350, 425 and 500 cycles.

The temperature rise shall not exceed 5°C (41°F) after the The temperature rise shall not exceed 125°C (257°F) and the
84th cycle, compared to the temperature measured after the stability factor “S” shall not exceed ± 10.
first cycle.

Wire Size Test Current for Copper Wires in A
UL 486 E, Table 4 UL 486 C, Table 6
AWG Assigned Heating Cycling
or Maximum Static Temperature Rating a Static Cyclic
kcmil (mm ) Ampere Rating b Heating a,c,g 75°C d,g 90°C e,g Heating Heating
2
30 (0.05) - 3 3.5 4 3 3.5
28 (0.08) - 3.5 4 5 3.5 4
26 (0.13) - 5.5 6 8 5.5 6
24 (0.20) - 7 8 10 7 8
22 (0.32) - 9 12 13 9 12
20 (0.52) - 12 16 17 12 16
18 (0.82) - 17 19 24 17 19
16 (1.3) - 18 20 31 18 20
14 (2.1) 15 [20] 30 [22] 33 [27] 40 30 33
12 (3.3) 20 [25] 35 [28] 39 [40] 54 35 38
10 (5.3) 30 [40] 50 [45] 56 [60] 75 50 56
8 (8.4) 50 70 80 100 70 80
6 (13.3) 65 95 105 131 95 105
4 (21.2) 85 125 140 175
3 (26.7) 100 145 165 205
2 (33.6) 115 170 190 240
1 (42.4) 130 195 220 275
1/0 (53.5) 150 230 255 320
2/0 (67.4) 175 265 300 370
3/0 (85.0) 200 310 345 435
4/0 (107) 230 360 405 505
250 (127) 255 405 445 565
300 (152) 285 445 500 625

a See Section 7.2, 8.2 and 9.2 (UL 486 E)
b Values are for 75°C (167°F), not more than 3 conductors in raceway or cable ampacities, National Electric Code, ANSI/NFPA 70.
c Values are for 75°C (167°F) single wires in free air ampacities, National Electric Code, ANSI/NFPA 70.
d Values are approximately 112% of the static heating test currents.
s Values for 8 AWG and larger wires are approximately 140% of the static heating test currents.
f See Section 9.2.4
g Values in parentheses apply to connectors with assigned ampere ratings.