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ALPHA FIX Terminal Blocks
Terminals with Spring-Loaded Connection
General data on 8WA
12/66
Siemens ET A1 · 10/2008
12
Connection of aluminum conductors
Spring-loaded terminals are also suitable for solid aluminum
conductors of up to 4 mm² when the normal preparation guide-
lines are complied with prior to connection, e.g. brushing and
greasing.
It must also be taken into account that the rated uninterrupted
currents will be lower due to the lower conductivity of aluminum:
• 1.5 mm² = 10 A
• 2.5 mm² = 16 A
• 4 mm² = 22 A
Accessories
Note
8WA accessories can only be used for 8WA terminals.
Linking system
The two-pin jumper is used for the linking of adjoining terminals.
To connect non-adjacent terminals the link rail, which can be cut
to any required length, is inserted into the linking ducts and the
terminals are connected with the one-pin plugs.
Jumpers and plugs
No linking accessories are necessary for initiator/actuator termi-
nals.
Insulation plates
8WA2 836 or 8WA2 845 insulation plates are used for isolation of
the link rails.
Barriers
The yellow barriers protrude from the terminal line and are used
as visual separation as well as to increase the rated insulation
voltage.
End retainers and accessories
The 8WA2 808 end retainers are snapped onto the standard
mounting rails to prevent the terminals from sliding out of place.
For insulation of the 8WA2 842 neutral busbar, the 8WA2 837
busbar end (8WA2 826 for Insta terminals) is inserted in the end
retainer.
There are several options for labeling the end retainers: the
8WA1 806 end labeling plate, the 8WA8 826-0A. terminal strip
label and 4 labeling plates. The end retainers can also be used
for the 8WA1 terminals with the 6 x 6 mm neutral busbar.
Retaining plates
The 8WA2 835 and 8WA2 844 retaining plates are used for fixing
the 8WA2 830 link rail in position and for removing it from the link-
ing duct.
Labeling accessories
For easier handling, the 8WA8 84. and 8WA8 86. labels are pro-
vided in card form with horizontal or vertical inscription, suitable
for all terminals from 1.5 to 70 mm².
The 8WA2 850 label holders are included in delivery with the
two-tier terminals. They can also be snapped into the sockets for
test plugs on the standard terminals.
The 8WA2 838 group label is snapped onto retaining plates or
insulation plates.
Lockouts
The 8WA2 848 lockout prevents impermissible switching of the
neutral disconnector on terminals with a neutral isolating func-
tion.
10 × 3 mm neutral busbars and accessories
The 8WA2 843 busbar support is included in delivery with the
8WA2 011-1NK23 and -3JG11 feeder terminals. The busbar
support can be inserted into the neutral isolating terminals or the
Insta terminals with neutral isolating function in order to fix the
8WA2 842 neutral busbar in position.
Test plugs
The terminals have openings for 8WA1 867 test plugs.
NSH00002
Bridge
NSH00003
Plug
Link-
rail
© Siemens AG 2008
