Intermatic UG40 User Manual
UG40 MODULAR SYSTEM
INSTALLATION INSTRUCTIONS
and
OPERATIONS MANUAL
TURN OFF POWER TO THE ELECTRIC SERVICE OR PANEL AND TO EQUIPMENT TO BE PROTECTED
BEFORE INSTALLING ANY SURGE PROTECTION DEVICE. ALL WIRING SHOULD COMPLY WITH THE
NATIONAL ELECTRIC CODE AND LOCAL ELECTRIC CODES.
INSTALLATION
1. TEST and verify system voltage to assure proper selection of the Surge Protection Device (SPD) in accordance
with the wiring diagrams shown on page 2. Turn off the electric power to the panel.
2. CONFIRM that the Surge Protection Device is the proper voltage configuration for this installation. Refer to the
installation diagrams for additional information.
3. SELECT a location to mount the UG40 cabinet. Mount as close as possible to the electric panel or individual
piece of equipment to be protected. The UG40 should be mounted on a flat vertical surface that can support the
weight of the device. Consideration should be given to the available knockout positions in the panel when decid
ing where to locate the UG40. All wire leads should be kept as short as possible to insure optimum operation.
4. The internal disconnect switch and associated 100 KAIC fuses are the prime current protection devices for the
UG40; therefore, lead wires may be connected to either a bus bar or a multi-pole breaker. If connected to a
breaker, use a 30 to 100 amp breaker with the appropriate number of poles. Panel breakers will not trip from
surge activity due to their inherent slow response.
NOTE:
For installations connecting directly to bus bar, the UG40 must be less than ten feet (10’) wire distance from
the bus bar to qualify the internal disconnect switch and fuses as the primary overcurrent device in accordance with
the NEC 10 foot rule 240-21(b).
MOUNTING
1. Attach the upper and lower mounting rails to the UG40 Cabinet using the screws provided.
2. Pre-drill holes in the surface on which the UG40 will be mounted. Use at least four (4) appropriate size mounting
screws or bolts.
3. Select and remove the proper size knockout from the UG40 cabinet. Install conduit, sealtite or other proper wire
protection between the panel and the UG40.
WIRING
1. For installations using less than two feet of wire for each lead, use at least 8 AWG stranded wire. For installations
requiring up to four feet of wire for each lead, use a minimum wire size of 6 AWG. Use 4 AWG minimum for over
6 foot lead length. Refer to section 3 under INSTALLATION if lead length is over 6 foot.
2. Measure and cut all leads to proper length, keeping in mind that leads should be as short and straight as possible.
3. Tape all wires together to minimize inductive coupling.
4. Route the wire lead bundle through the conduit to the panel.
5. Connect the GROUND (green) lead to the ground bus in both the UG40 and the electric panel.
6. If used, connect the NEUTRAL (white) to the neutral fuse terminal in the UG40 and the neutral bus in the electric
panel. If installing at the main distribution panel, the neutral and ground leads could terminate at a common bus
bar in the panel.
7. Connect the phase leads to the disconnect switch in the UG40. Then connect them to the appropriate breaker or
bus connections in the electric panel. NOTE: For HIGH LEG DELTA, make certain that the high leg is connected
to the center switch position in the UG40.(Refer to Figure 3) For GROUNDED PHASE DELTA, make certain that
the grounded phase is connected to the center switch position in the UG40.(Refer to Figure 4)
8. Connect wires to the alarm relay terminals. Alarm wires should be routed through a knockout that is separate from
the power leads. (Refer to alarm wiring drawings)
9. CHECK all connections for tightness.
10. REPLACE Disconnect Switch Cover.
11. REPLACE Dead-front panel.
CAUTION:
WIRING DIAGRAMS
120/240 VAC Single Phase
120/208 VAC Three Phase Wye
277/480 VAC Three Phase Wye
480 VAC Three Phase Delta
120/240 VAC Three Phase High Leg Delta
240 VAC Three Phase Delta
240 VAC Ground Phase Delta
UG40A2401S
UG40A2403D
UG40A2083Y
UG40A2403G
UG40A4803D
UG40A4803Y
L1
L2
L3
N
G
L1
L2
L3
N
G
L1
L2
L3
N
G
L1
L2
N
G
L1
L2
L3
G
L1
L2
L3
G
BLACK
BLACK
BLACK
WHITE
GREEN
BLACK
BLACK
BLACK
WHITE
GREEN
BLACK
BLACK
BLACK
GREEN
BLACK
BLACK
BLACK
GREEN
BLACK
RED
BLACK
WHITE
GREEN
BLACK
BLACK
WHITE
GREEN
ALARM RELAY OUTPUT CONNECTIONS
1. Two Wire Closed Loop: Connect feed wire to the Common ( C ) terminal and return wire to the Normally Opened
(N/O) terminal. During normal operation, the contact will be closed between C and N/O. The contact will open dur
ing an alarm condition. (Refer to Figure 7)
2. Two Wire Opened Loop: Connect the feed wire to the Common ( C ) terminal and return wire to the Normally
Closed (N/C) terminal. During normal operation, the contact will be opened between C and N/C. The contact will
close during an alarm condition. (Refer to Figure 8)
3. Three Wire Supervised Loop: Connect feed wire to the Common ( C ) terminal, one return wire to the Normally
Opened (N/O) terminal and the second return wire to the Normally Closed (N/C) terminal. During normal operation, the contact will be closed between C and N/O and opened between C and N/C. An alarm condition will
reverse the condition. (Refer to Figure 9)
4. Consult the instructions for your specific monitoring system for additional information.
Figure 1
Figure 6
Figure 3
Figure 5
Figure 2
Figure 4
N/O
C
N/C
N/O
C
N/C
N/O
C
N/C
Figure 7
Figure 8 Figure 9
2
NOTE: For convenience sake, these wireing diagrams show installation on the load side of a breaker. UG40 systems may
be installed without an external breaker. Refer to installation instruction number 4 on page 1.
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