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Instruction Booklet IB158002EN
Eective September 2023
EATON www.eaton.com
Installation instructions for
SPC Max Series surge protective device
Equipment testing
WARNING
CONDUCTING DIELECTRIC, MEGGER, OR HI-POTENTIAL TESTING WITH THE SPD
INSTALLED WILL CAUSE INTERNAL DAMAGE TO THE SPD. THE SPD WILL ALSO
CAUSE THE TEST TO FAIL.
Every Eaton SPD Max Series unit is tested at the factory for dielectric
breakdown. No further SPD testing is required for installation.
If you desire to test distribution equipment by performing
dielectric, megger, or hi-potential tests, any installed SPD must
be disconnected from the power distribution system to prevent
damage to the unit. Follow this procedure to safely disconnect
the SPD.
For SPDs connected to a circuit breaker or fuse:
1. Three-wire delta SPDs: Turn off the circuit breaker or remove
the fuses from the fuse holder to isolate the SPD.
2. Wye and split-phase SPDs: Turn off the circuit breaker or
remove the fuses from the fuse holder to isolate the SPD and
remove the neutral connection on wye SPDs.
Installation
WARNING
INSTALLING AN SPD THAT IS IMPROPERLY RATED FOR THE ELECTRICAL SYSTEM
VOLTAGE COULD CREATE A POTENTIALLY HAZARDOUS CONDITION, RESULTING
IN INJURY OR EQUIPMENT DAMAGE.
Preparation for installation
CAUTION
EATON SPD SERIES PRODUCTS MUST BE INSTALLED OR REPLACED BY A
QUALIFIED ELECTRICIAN TO AVOID INJURY OR EQUIPMENT DAMAGE.
Before installing an Eaton SPD Max Series unit, do the following:
• Verify that the area is clear of any dirt, debris, or clutter that
may hamper the installation process
• Verify that there is enough space to install the SPD;
see Figure 58 for dimensions
• Confirm that all tools and equipment needed for the installation
are available
• Confirm that the system voltage and wiring configuration is the
same as the SPD you are installing; check the voltage rating label
on the side of the SPD
WARNING
TURN OFF THE POWER SUPPLY BEFORE WORKING IN ANY ELECTRICAL CABINET
OR ON ANY CIRCUIT BREAKER PANEL. FAILURE TO DO SO COULD RESULT IN
INJURY OR DEATH FROM ELECTRICAL SHOCK.
WARNING
A POOR GROUND, OR GROUNDING/BONDING VIOLATIONS, COULD PREVENT
THE SPD FROM PERFORMING AS SPECIFIED. DO NOT USE THE SPD TO CARRY
OR PASS THROUGH GROUND TO OTHER DEVICES OR LEADS. DAMAGE TO THE
EQUIPMENT MAY RESULT.
• Check the facility grounding system; all grounding, bonding, and
earthing must meet the NEC, CEC and any other national, state,
and local electrical codes
• An insulated grounding conductor that is identical in size
and insulation material and thickness to the grounded and
ungrounded circuit supply conductors, except that it is green with
or without one or more yellow stripes, is to be installed as part of
the circuit that supplies the SPD Max Series unit
• Refer to NEC Table 250.122 select the appropriate size of
the grounding conductor. This grounding conductor is to be
grounded to earth at the service equipment or other acceptable
building earth ground, such as the building frame in the case of a
high steel-frame structure
• Any attachment-plug receptacles in the vicinity of the SPD Max
Series unit are to be of a grounding type, and the grounding
conductors serving these receptacles are to be connected to
earth ground at the service equipment or other acceptable
building earth ground, such as the building frame in the case
of a high-rise steel-frame structure
• Pressure terminal or pressure slicing connectors and soldering
lugs used in the installation of the SPD Max Series unit shall be
identified as being suitable for the material of the conductors;
conductors of dissimilar metals shall not be intermixed in a
terminal or splicing connector where physical contact occurs
between dissimilar conductors unless the device is identified for
the purpose and conditions of use
Installation locations
Eaton’s SPD Max Series can be installed next to, above, or below any
existing electrical enclosure.
The ideal mounting location for the Eaton SPD Max Series is as
close as possible to the electrical enclosure and should be mounted
in such a way as to minimize the cable length and eliminate any
sharp bends in the wiring conduit.