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For troubleshooting, call technical assistance at 1-800-237-4567 or [email protected]
12
IO-70061
01/2020
ASCO 430 Surge Protective Device (SPD)
Wiring
Follow steps 1 through 7 to make wiring connections:
1.
Turn off all power supplying this equipment before working on or inside
any enclosure containing this equipment.
2.
Confirm SPD is rated for your system by comparing voltage measure
-
ments to the Line Voltage (L-L, L-N) on the product label.
3. Identify proper location for the SPD. Locate as close as possible to
the mains of the panel being surge-limited so the wires are as short as
possible. Mount unit securely.
Note:
The SPD must be installed in an accessible location (not within
walls unless surface mounted with the ASCO KITFMXF flush mount
kit).
4. Install in accordance with national and local electrical codes and match
the branch circuit Overcurrent Protection Device (OCPD) to the wire
size.
5. Twist conductors 1/2 turn or more for every twelve inches of length.
6. Do not loop or coil wires. Be sure to maintain adequate wire bending
space per NEC.
7. Use on solidly grounded systems unless the SPD model is designed for
installation on ungrounded/HRG systems.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
For outdoor installation use and appropriate weather sealing at the nipple
(o-ring, sealing conduit, etc).
Failure to follow these instructions will result in death or serious injury.
Figure 4:
Conduit Installation
Table 2:
Wiring Diagram Location
1
Wiring for:
Figure and
Page
Single-phase, three-wire,
grounded installation
Figure 6 on
page 11
Single-phase, two-wire, +
ground
Figure 7 on
page 11
Three-phase, three- or
four-wire, grounded WYE
installation
Figure 8 on
page 12
Three-phase, three- or
four-wire, high-leg delta
installation
Figure 9 on
page 12
Three-phase, three-wire +
ground, delta installation
Figure 10 on
page 12
Three-Phase, Three-Wire,
Corner Grounded, Delta
Installation
Figure 11 on
page 12
1
See “Dry Contacts” on page 15 for dry contact wiring.
DANGER
CORRECT
INSTALLATION
Threaded 6
Full Turns
INCORRECT INSTALLATIONS
OVERTIGHTENED
Stresses box,
ONLY
6 full turns
required
POOR
ENGAGEMENT
Conduit needs
to be threaded
in farther
