Page 605 - Wago_Rail-MountedTerminalBlockSystems_Volume1_2015_US.pdf

14

603

• Conditioning – Temperature-Rise Test to UL 1059, UL 486 C
Tests performed:
to UL 1059 (rail-mounted terminal blocks) to UL 486 C (splicing wire connectors)

Conditioning:

The clamping units are pre-wired/pre-inserted 9 times using a conductor with maximum rated cross section. At the 10th time
a new conductor is connected.
After this, a static heating test is performed.

Static Heating Test:
Test current: Rated current of terminal block Test current: Increased test current (see Table 6)
Test duration: 30 days Test duration: 30 days
Max. permissible Max. permissible
temperature rise: 30°C temperature rise: 50°C

• Grounding and Bonding Equipment to UL 467
When used in “grounding and bonding” equipment, e.g., terminal blocks, shall withstand a short circuit test using the test currents
and test durations as specified in Table 5.

2
In the following example, an AWG 2 (35 mm ) ground con-
ductor terminal block (285-635) is tested for 6 seconds at
3,900A.
Table 5
Wire Size Test Test
Copper Duration Current
AWG mm 2 s A
14 (2.1) 4 300
12 (3.3) 4 470
10 (5.3) 4 750
8 (8.4) 4 1180
6 (13.3) 6 1530
4 (21.2) 6 2450
3 (26.7) 6 3100
2 (33.6) 6 3900
1 (42.4) 6 4900
I 1/0 (53.5) 9 5050
2/0 (67.4) 9 6400
3/0 (85.0) 9 8030
Test specimen
4/0 (107) 9 10100
250 MCM (127) 9 12000

After the test, the specimen shall neither show evidence of cracking, breaking or melting, nor any changes in electrical properties.

14