ECTION


PART 1 GENERAL

1.1 SCOPE
These specifications describe pertinent material requirements and installation practices for
LV (Low Voltage) AC Power Panel Surge Protective Devices (SPD), also known as Transient
voltage Surge Suppressors or TVSS.

1.2 APPLICABILITY
The Surge Protective Devices detailed herein shall be fully applicable for the purpose of
protecting all facility AC electrical circuits from the hazardous effects of transient voltages.
These transients may be generated externally by lightning induced energies, utility load factor
corrections, and substation switching or they can be internally generated due to inductive and/or
capacitive load switching.

1.3 SUITABILITY
Surge Protective Devices shall be suitable for all service entrance and sub-panel locations as
designated on the power one-line diagrams, prints, or schedules furnished by the electrical
engineer. Products are to be configured for parallel installation no series designs are to be
considered acceptable. Products shall be designed to retrofit onto all of the major brands of
branch panels. The product shall be designed to become integral to the new or existing
panelboard. The product shall also be designed to allow installation as a stand-alone device
allowing mounting adjacent to the panelboard. Installation is to be accomplished by a qualified
electrical contractor.

1.3.1 Definition of Installation Locations
Facility entrance and main distribution locations shall be defined per ANSI/IEEE C62.41 location
Category C3.

1.3.2 Agency
Approvals
The Surge Protection Devices and associated hardware must be Listed to UL1449 Second Edition, as
defined by ANSI/NFPA 70-2002.

Surge Protection Devices with filters must be UL1283 Listed as an Electromagnetic Interference Filter.

1.4
REFERENCE STANDARDS AND PUBLICATIONS
The following standards and publications are referenced throughout this specification and shall
apply where relevant.

1.4.1 UL1449 Second Edition Transient Voltage Surge Suppression

1.4.2 UL1283 Electromagnetic Interference Filters
1.4.3 ANSI/IEEE C62.41 Recommended Practice on Surge Voltages in Low Voltage AC
Power
Circuits

1.4.4 ANSI/IEEE C62.33 Standard Test Specifications for Varistor Surge Protective Devices

1.4.5 ANSI/IEEE C62.45 IEEE Guide of Surge Testing for Equipment Connected to


Low Voltage AC Power Circuits

1.5
MANDATORY SUBMITTAL REQUIREMENTS

1.5.1 All Applicable Product Literature

1.5.2 Product Installation Instructions

1.5.3 Product Material List & Part Numbers

1.5.4 Product 10 Year Warranty Statement

1.5.5 Manufacturers Certificate of Compliance (Ref. Published Specifications)


PART 2 PRODUCT

2.1 MANUFACTURERS
QUALIFICATIONS
All Surge Protective Devices shall be manufactured by a Company engaged in the design,
development, and manufacture of such devices for electrical and electronic equipment
and systems.

The manufacturer shall offer repair or replacement service for all materials and components
incorporated in the Surge Protective Devices.

Technical assistance shall be provided by the manufacturer through the efforts of a factory
representative or a local distributor and via a factory staffed toll-free technical hotline.

The manufacturer will provide a toll-free Customer Service number to facilitate all inquiries
regarding product returns, warranty claims, purchasing requirements and payment or
credit issues.

2.2 WARRANTY
All Surge Protective Devices, associated hardware, and supporting components shall be
warranted to be free from defects in materials and workmanship, under normal use and in
accordance with the instructions provided, for a period of ten years. (Excludes installation
labor and site preparations.)

Any component or subassembly contained within the Suppressor that shows evidence of
failure or incorrect operation, during the ten-year warranty period, shall be replaced by the
manufacturer without question, this includes lightning related failures. No repairs are to be
acceptable - only new and unused materials are to be allowed.

All surge protective devices, subassemblies, and components are to be 100% tested and
certified by the manufacturer to meet their published performance parameters. A certificate
of compliance shall be provided with all goods delivered.
2.3 ELECTROMECHANICAL
PACKAGING
2.3.1 Enclosures
Enclosures shall be NEMA 1 Rated. Housing shall be constructed of 16-gauge metal and shall meet
UL67 requirements.

2.3.2 Electrical
Contacts
All surge-carrying connections are to be constructed of heavy-duty low impedance contacts. No plug-in
suppression components with friction contacts are to be allowed.

The only wiring connections allowed within the suppressor are those connecting the device to the service
panel and those carrying low voltage/low current for status indication.

2.3.3 Field Replaceable Protection Modules
Modules shall be designed for easy field replacement and shall have color coded labels to identify
specific applications. Module plastics shall have a UL94-5V flame class rating. Modules shall not be
potted or otherwise encapsulated without adequate safety fusing (to prevent explosive failures).

Modules shall contain both thermal and short circuit safety fusing. Modules shall contain on-board
diagnostics and status indication, and be equipped to provide remote monitoring capabilities, which are
completely isolated from surge currents.

Modules, which protect between Neutral and Ground, shall contain a Visual Warning of HIGH NEUTRAL
to GROUND Voltages.

Modules shall be UL Recognized Components.

2.4 ELECTRICAL
CONFIGURATONS
Surge Protective Devices shall be of shunt design configured for the specific type and voltage of
electrical service required. Protection is to be provided for all modes: L-N, L-G, L-L, and N-G.

2.4.1 300kA Rated Units -- Heavy Duty Service Entrance Protection



Wiremold

Sales
Model ELECTRICAL
SERVICE

ZCM120T
120/240V,
Single , 3-Wire, 300kA

ZCM120Y
120/208V,
3 , 4-Wire Wye, 300kA

ZCM277Y
277/480V,
3 , 4-Wire Wye, 300kA

DIMENSIONS: 20" x 16" x 5 3/4" [51cm x 41cm x 15cm] Weight: Approx. 25 lbs. [55kg]

2.4.2 180kA Rated Units -- Main/Branch Service Panel Protection


Wiremold

Sales
Model ELECTRICAL
SERVICE

ZBM120T
120/240V,
Single , 3-Wire, 180kA

ZBM120Y
120/208V,
3 , 4-Wire Wye, 180kA

ZBM277Y
277/480V,
3 , 4-Wire Wye, 180kA

DIMENSIONS: 20" x 16" x 5 3/4" [51cm x 41cm x 15cm] Weight: Approx. 25 lbs. [55kg]
2.5 PERFORMANCE
2.5.1 Operating
Voltage
The nominal voltage rating and Maximum Continuous Operating Voltage (MCOV) shall have the values
shown in Table 1 below:

Nominal Voltage Rating (Vrms) MCOV (Vrms)
120 150
277 320

[TABLE 1]

2.5.2 Listing
The Surge Protective Device and associated hardware must be Listed to UL1449 Second Edition,
as defined by ANSI/NFPA 70-2002.

Surge Protective Devices with filters shall be Listed to UL1283 Electromagnetic Interference Filters.

The suppression voltage of the complete panel mount surge protective device shall be assessed by UL;
these figures must not exceed the values shown in Table 2. UL suppression voltage ratings for modules
or subassemblies are not acceptable.

Service Voltage UL1449 2
nd
Edition Suppression Voltage
300kA 180kA
120 400V 400V
277 800V 800V

[TABLE 2]

2.5.3 Environmental
Operating Temperature Range: -40 degrees C to +85 degrees C

Operating Humidity Range:
0 to 95% (non-condensing)

2.5.4 Maximum Single Withstand Surge Current
Surge Protective Devices (including all fusing and overcurrent protection) shall be independently tested
for surge currents withstand per Table 3. The failure of, or operation of, any fuse or overcurrent
device during this test is not permissible.

Actual Independent Laboratory Testing Including all Safety Fusing

Surge Protection Device Rating Independently Tested Current
300kA Rated Units <200kA
180kA Rated Units <90kA

[TABLE 3]

Compliance To This Specification Must Be Provided Upon Request
From An Independent Testing Laboratory

2.5.5 Filtering
Performance
All Surge Protection Devices with filter options shall be UL1283 Listed. The extended range power filter
shall be capable of EMI/RFI noise attenuation of 75dB maximum 100kHz to 100MHz.

2.5.6 Joule Ratings and Response Times
The selection of Surge Protective Devices shall not be made solely, or in part, based upon either of these
two ambiguous specifications. These terms are not recognized by ANSI, NEMA, IEEE, or IEC Standards
as legitimate suppressor performance parameters. The key selection elements of a quality suppressor
are its low clamping capability and its maximum surge handling capacity.
2.6 SAFETY
2.6.1 General
Suppressors shall be UL1449 Second Edition Lis