s
Table 8.
Application: Potential
Involved Volts
Through
Air
Over
Surfaces
A.5)
E.4)
3/4
1-1/4
2
(19.4)a
(12.
Dead-front switchboards,
panelboards, service equip-
ment and similar applications
51 150
151 300
301 600
1/2
3/4
1
(12.013 inch (0.7)
(19.6)
(30.
Each material tested may receive several ratings, depending the wall thickness.
c
Applies only terminal blocks investigated Part of
this standard.4)a
(9.
UL Rating Categories:
V1
• Specimen mounted vertically
• Burning stops within seconds after the
flame removed
• flaming drips allowed
• Afterglow extinguishes within max.
Several ratings can applied, based the rated burning, time extinguish, ability resist dripping, and afterglow extinguishing time.wago.8)
0.
45°
WAGO Rail-Mount Terminal Block Systems
Technical Information
Tests and Testing Procedures per Standards (continued)
UL Specifications Underwriters Laboratories, USA (continued)
• Insulation Parameters per 1059
• Flammability Test per 94
The table below shows the potential involved and the corresponding clearances and creepage distances required different applications.1 Minimum Acceptable Spacing for Terminal Blocks per 1059 Standard
Spacing inches (mm) between
uninsulated live parts opposite
polarity, uninsulated live parts and
uninsulated grounded parts other
than the enclosure
Notes:
1 slot, groove, similar, 0.com
20
125
10
Test specimen
Dimensions mm
approx.
b
See Section 8.4)
(9.33 less between live part and an
insulating surface disregarded for the purpose
of measuring over surface spacing.8)
(50.0)
(17.6)a
(4.5)
1/4
3/8
1/2
(6.28
www.5)
1/16a
3/32a
1/2
(1.1 (UL 1059).8)
B.
2
Air space 0. s
V2
• Specimen mounted vertically
• Burning stops within seconds after the
flame removed
• Flaming drips allowed
• Afterglow extinguishes within max.5 (UL 1059)
The spacing values indicated sub-paragraph in
Table 8.
Commercial appliances,
including business equip-
ment, electronic data pro-
cessing equipment and simi-
lar applications
51 150
151 300
301 600
1/16a
3/32a
3/8
(1.6)a
(2.1)
(25.1 are applicable terminal block for use only
in with industrial control equipment where the load on
any single circuit the terminal block does not exceed
15 150 151 300 V,
5 301 600 the maximum ampere rating,
whichever less. Industrial, general 150
151 300
301 600
1/8a
1/4
3/8
(3.
Industrial, devices having lim-
ited ratingsb
51 300
301 600
1/16a
3/16a
(1.85
1.55
0.
a
The spacing between terminal blocks opposite polar-
ity and the spacing between terminal block and a
grounded dead metal part shall not less than 1/4 inch
(6. See Section 22.8)a
1/8a
3/8
(3.1)
(31.70
(14.20
(21.7)
D.
This test provides indication the material’s ability extinguish flame, once ignited.33 mm) wide or
less the contour the insulating material dis-
regarded.2)a
(6. s
During the test, 3/4 inch (20 mm) flame applied for two 10-sec-
ond intervals the specified bar specimen held vertically.
V0
• Specimen mounted vertically
• Burning stops within seconds after the
flame removed
• flaming drips allowed
• Afterglow extinguishes within max.
Terminal blocks rated
601 1500 Vc
601 1000
1001 1500
0.4)
(9.2)a
(9.5)
.6)a
(2.5)
(12.4 mm) short-circuiting grounding such terminal
blocks may result from protruding wire strands.7)
C
