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16
IO-70064
05/2020
ASCO 460/465/480/485 Surge Protective Device (SPD)
Wiring
Figure 4:
Three-Phase, Three- or Four-Wire, Grounded Wye Installation
Note 2:
The neutral conductor is not present on
three-wire grounded power systems. For these
systems, bond the neutral and ground lugs
together inside the SPD using 10 AWG wire.
A
2
1
3
4
6
5
7
8
B
C
N
A
B
C
N
A B
N
C
G
THREE POLE
C
N
G
A
TWO POLE
2
1
3
4
6
5
7
8
G
C B
N
A
THREE POLE W/ DS
N
G
B
SINGLE POLE
C
N
G
B
A
THREE POLE
Figure 5:
Three-Phase, Three- or Four-Wire, High-Leg Delta Installation
A
2
1
3
4
6
5
7
8
B
C
N
A
B
C
N
A B
N
C
G
THREE POLE
C
N
G
A
TWO POLE
2
1
3
4
6
5
7
8
G
C B
N
A
THREE POLE W/ DS
N
G
B
SINGLE POLE
C
N
G
B
A
THREE POLE
SPD
PHASE A
PHASE B
NEUTRAL
GROUND
PHASE C
A
B
N
C
See Note 2
SPD
PHASE C
PHASE A
PHASE B
See Note 3
NEUTRAL
GROUND
N
B
C
A
HAZARD OF ELECTRIC SHOCK,
EXPLOSION, OR ARC FLASH
• The high-leg of the power system must
connect to the B phase lug of the SPD.
Failure to follow these instructions will result
in death or serious injury.
Note 3:
The neutral conductor is not present on
three-wire grounded power systems. For these
systems, bond the neutral and ground lugs to-
gether inside the SPD using 10 AWG wire.
DANGER
