TECHSPECS_25RA001_IH Hyd Sys Upgrade_amd0007_2Jun25.pdf

Ice Harbor Intake Gate Hydraulic System Upgrades W912EF25RA001 amd 0007

PROJECT TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 00 00.00 28 GENERAL REQUIREMENTS

01 11 00.00 28 SUMMARY OF WORK

01 11 01.00 28 SUPPLEMENTARY REQUIREMENTS

01 12 16.00 26 WORK SEQUENCE

01 14 00.10 28 PROJECT SITE RESTRICTIONS

01 14 00.90 28 INTEGRATING ANTITERRORISM (AT) AND OPERATIONS SECURITY

(OPSEC)

01 20 00.00 20 PRICE AND PAYMENT PROCEDURES

01 22 00.00 28 MEASUREMENT AND PAYMENT

01 32 01.00 28 PROJECT SCHEDULE

01 33 00 SUBMITTAL PROCEDURES

01 35 29.10 28 GOVERNMENTAL SAFETY REQUIREMENTS

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

01 45 01.00 28 RESIDENT MANAGEMENT SYSTEM CONTRACTOR MODE (RMS CM)

01 45 04.00 28 CONTRACTOR QUALITY CONTROL

01 51 00.00 28 TEMPORARY UTILITIES

01 54 19.10 28 CRANES

01 55 10.00 28 CONTRACTOR WORK, ACCESS AND STORAGE AREAS

01 57 20.00 28 ENVIRONMENTAL PROTECTION

01 78 00.00 28 CLOSEOUT SUBMITTALS

01 78 23.00 28 OPERATION AND MAINTENANCE DATA

01 79 00.00 28 DEMONSTRATION AND TRAINING

01 91 00.00 26 SYSTEMS TESTING AND COMMISSIONING

DIVISION 02 - EXISTING CONDITIONS

02 82 13.01 28 CLASS II ASBESTOS ABATEMENT

02 83 33.14 28 REMOVAL/CONTROL AND DISPOSAL OF PAINT WITH LEAD - SHORT

VERSION

DIVISION 03 - CONCRETE

03 60 00.01 26 CONCRETE DEMOLITION, REPAIR OF CONCRETE SURFACES, AND

MINOR EQUIPMENT FOUNDATIONS

DIVISION 05 - METALS

05 05 23.17 26 WELDING (STEEL), FABRICATION, AND MACHINE WORK

05 50 04.00 26 METALS: MATERIALS, PRODUCTS, AND MISCELLANEOUS ITEMS

DIVISION 09 - FINISHES

09 97 02.13 26 PAINTING - HYDRAULIC STRUCTURES

DIVISION 13 - SPECIAL CONSTRUCTION

13 48 00.00 26 SEISMIC RESTRAINT FOR MECHANICAL AND ELECTRICAL EQUIPMENT

DIVISION 25 - INTEGRATED AUTOMATION

25 05 11.01 26 CYBERSECURITY FOR CONTROL SYSTEMS

DIVISION 26 - ELECTRICAL

26 05 00.00 26 BASIC ELECTRICAL MATERIALS AND METHODS

PROJECT TABLE OF CONTENTS Page 1

26 05 19.00 26 INSULATED WIRE AND CABLE

26 05 26.00 26 GROUNDING

26 42 14.01 26 CATHODIC PROTECTION BY SACRIFICIAL ANODES

DIVISION 33 - UTILITIES

33 56 53.00 26 REHABILITATION OF HYDRAULIC FLUID RESERVOIR TANKS

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

35 05 40.14 26 HYDRAULIC POWER SYSTEMS FOR CIVIL WORKS STRUCTURES

35 05 40.15 26 HYDRAULIC FLUID

DIVISION 40 - PROCESS INTERCONNECTIONS

40 05 13.96 26 WELDING: PIPING AND PRESSURIZED SYSTEMS

40 95 23.00 26 PROGRAMMABLE LOGIC CONTROLLER HARDWARE

DIVISION 41 - MATERIAL PROCESSING AND HANDLING EQUIPMENT

41 22 13.75 26 LIFTING DEVICES

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 2

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 11 00.00 28

SUMMARY OF WORK

PART 1 GENERAL

1.1 DEFINITIONS

1.2 SUMMARY OF WORK

1.3 LOCATION OF WORK

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used)

-- End of Section Table of Contents --

SECTION 01 11 00.00 28 Page 1

THIS PAGE INTENTIONALLY LEFT BLANK

SECTION 01 11 00.00 28 Page 2

SECTION 01 11 00.00 28

SUMMARY OF WORK

PART 1 GENERAL

This summary of work is a generalized description of work and is not all inclusive.

1.1 DEFINITIONS

In these Specifications, the word "provide" means to "furnish" and "install" inclusive of any other activities such as design, fabrication, and testing or any other activity to make the equipment or system ready for use.

1.2 SUMMARY OF WORK

The work covered by this contract for the Intake Gates Hydraulics includes the following:

a. Provide 19 new hydraulic cylinder assemblies: 18 cylinder assemblies to be installed in gate slots plus one additional cylinder assembly that will be placed into long term storage as a spare.

b. Provide 1 89 new support beams and associated hardware.

c. Provide 36 new bearing beams.

d. Provide a new hydraulic power unit, including new motor starters, breakers, associated hardware, and other electrical and control components.

e. Provide new high and low pressure hydraulic fluid header piping system.

f. Provide 6 new main unit hydraulic control panels, inclusive of all new electrical and control components.

g. Replace the 3 accumulator tanks located in the pipe gallery.

h. Provide approximately 15,000 gallons of new hydraulic fluid.

i. Rehabilitate the 2 existing hydraulic fluid reservoir tanks and transfer piping, including the installation of one off-line oil filtration system.

j. Rehabilitate the 18 existing gate position indicating systems.

k. Add emergency gate closure switches to the control room main unit switchboards.

l. Provide cable and conduit for system power, controls and annunciation.

m. Provide a temporary hydraulic power unit, temporary hydraulic fluid

SECTION 01 11 00.00 28 Page 3

G4EDDMTJ

Line reservoir, and temporary high and low pressure hydraulic fluid header piping.

n. Remove and dispose of existing:

1) 19 hydraulic cylinders

2) 18 support beams and 36 bearing beams

3) Hydraulic power unit

4) High and low pressure headers

5) 6 main unit hydraulic control panels

6) Approximately 19,500 gallons of hydraulic fluid.

7) Electrical and control equipment associated with the above items.

8) Gate position indication equipment not reused.

o. Provide as-built drawings, operations manual, training, and operations and maintenance manual, and spare parts as specified.

1.3 LOCATION OF WORK

Ice Harbor Lock and Dam near Burbank, WA in Walla Walla County. Work will occur on the Intake Deck of the Powerhouse, the pipe gallery just below the Intake Deck, near the elevator shaft in the Erection Bay, and in the Oil Storage Room.

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used) -- End of Section --

SECTION 01 11 00.00 28 Page 4

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 12 16.00 26

WORK SEQUENCE

PART 1 GENERAL

1.1 SEQUENCE OF WORK

1.2 PRE-MAIN UNIT OUTAGE PHASE

1.2.1 Timeline

1.2.2 Work Tasks

1.3 FIRST MAIN UNIT OUTAGE PHASE

1.3.1 Timeline

1.3.2 Outage Structure

1.3.3 Equipment Staging

1.3.4 Work Tasks

1.4 SECOND MAIN UNIT OUTAGE PHASE

1.4.1 Timeline

1.4.2 Equipment Staging

1.4.3 Work Tasks

PART 2 PRODUCTS

PART 3 EXECUTION

SECTION 01 12 16.00 26 Page 1

SECTION 01 12 16.00 26 Page 2

SECTION 01 12 16.00 26

WORK SEQUENCE

PART 1 GENERAL

The work covered by this section of the specifications consists of work common to more than one section of these TECHNICAL SPECIFICATIONS.

1.1 SEQUENCE OF WORK

This section lists portions of work that must be completed before subsequent work can be started. The Contractor must incorporate these requirements into the Work Plan and Schedule. Work is grouped in the following phases: pre-main unit outage, first main unit outage and second main unit outage.

Tasks under each phase are described in general terms and may not be comprehensive of every activity or tasks involved with that portion of the scope of work. Refer to the appropriate technical sections for the complete requirements for each work task.

Work tasks inadvertently left out of this section do not relieve the Contractor of performing the work. The requirements in the technical sections govern.

1.2 PRE-MAIN UNIT OUTAGE PHASE

1.2.1 Timeline

The pre-main unit outage phase covers all work from Notice to Proceed to the completion of the on-site work for the pre-main unit outage. Pre-main unit outage work must be completed before the start of the first main unit outage with the exception of the delivery of equipment and materials needed to perform work during the second unit outage. Specific work covered in this phase is listed in greater detail below. The start and completion dates for when on-site work shall be performed for the pre-main unit outage phase is contained in FAR Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK (APR 1984).

1.2.2 Work Tasks

The pre-main unit outage phase has the following work tasks:

a. Temporary Hydraulic Fluid Headers - Provide, install, clean, and test the temporary hydraulic fluid headers. Temporary hydraulic fluid headers connect the temporary hydraulic power unit and temporary hydraulic fluid reservoir to the new hydraulic fluid headers.

b. New Hydraulic Fluid Headers - Fabricate and deliver to the site the new hydraulic fluid headers for the first main unit outage phase.

c. Temporary Hydraulic Power Unit - Provide, install, field test, and make ready for use the temporary hydraulic power unit.

d. Temporary Hydraulic Fluid Reservoir - Provide, install, field test, SECTION 01 12 16.00 26 Page 3 and make ready for use the temporary hydraulic fluid reservoir.

e. New Hydraulic Cylinders - Design, fabricate, shop test, and deliver to site nine new hydraulic cylinders for the first three sets of intake gates.

f. New Support and Bearing Beams - Design, fabricate, shop test, and deliver to site nine new support beams and 18 new bearing beams for the first three sets of intake gates.

g. New Hydraulic Control Panels - Design, fabricate, shop test, and deliver to site, three new hydraulic control panels.

h. New HPU RTU Cabinet - Design, fabricate, shop test, and deliver to site, one HPU RTU Cabinet.

1.3 FIRST MAIN UNIT OUTAGE PHASE

1.3.1 Timeline

The unit outage phase covers all work from the completion of the Pre-Main Unit Outage Phase to the start of the Second Main Unit Outage Phase.

On-site work for the First Main Unit Outage Phase may not begin until all work covered under the Pre-Main Unit Outage Phase is complete.

1.3.2 Outage Structure

During the first main unit outage work window, Main Units 4, 5, and 6 will be made available to the Contractor. All work for those three Main Units must be accomplished during this outage window.

See FAR Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK (APR 1984) contains the start and completion dates for the main unit work windows.

1.3.3 Equipment Staging

Prior to the start of each outage phase, all major materials and equipment must be staged on-site and ready for installation. For both Main Unit outages, the equipment needed to complete all three units must be on-site. The Government will verify that the following materials and equipment are on-site prior to turning the first unit over to the Contractor:

Item Main Unit Outage Quantity

New Hydraulic Cylinders (each) 9

New Stub Shafts and Split Nuts (each) 9

New Support Beams (each) 9

New Bearing Beams (each) 18

New Hydraulic Control Panels (each) 3

New Electrical Control Equipment (set) 3

SECTION 01 12 16.00 26 Page 4

Item Main Unit Outage Quantity

New Hydraulic Header Piping (set) 3

New Flexible Hoses (set) 9

Intake Gate Position Equipment (set) 9

New Hydraulic Fluid Volume as determined by Contractor to complete the outage.

1.3.4 Work Tasks

Perform the following tasks on each Main Unit. The tasks for all units during the outage are identical (except for the delivery of spare parts):

a. Replacement of the hydraulic equipment for three intake gates - Replace the hydraulic equipment which includes, but may not be limited to the following for each gate:

1) Remove and dispose of the existing flexible hoses. Install new hoses.

2) Remove and dispose of the existing hydraulic cylinder. Install the new hydraulic cylinder.

3) Dispose of all oil contained within the above existing equipment.

4) Fill equipment with new hydraulic fluid.

b) Remove and dispose of the existing support and bearing beams.

Install new support and bearing beams.

c. Before installing the new hydraulic fluid headers, remove and dispose of the existing hydraulic fluid headers and all oil contained within them, including if applicable the hydraulic fluid header accumulator.

d. Install, clean, and test the new hydraulic fluid headers and the hydraulic fluid header accumulator/s.

e. Remove and dispose of the existing hydraulic control panel.

f. Install new hydraulic control panel, including connections to the new hydraulics headers and new control system.

g. Perform commissioning of the new hydraulics system after replacing the hydraulic system for each main unit. Includes, but may not be limited to, hydrostatic testing of the new hydraulic system and functional testing of the new hydraulic system and control system.

h. Provide training to the Government once the first Main Unit commissioning is complete and the Main Unit is returned to service.

i. New Hydraulic Power Unit - Design, fabricate, shop test, and

SECTION 01 12 16.00 26 Page 5 deliver to the site the new hydraulic power unit and all associated control equipment (for installation during second main unit outage).

j. Deliver the spare parts to the site.

1.4 SECOND MAIN UNIT OUTAGE PHASE

1.4.1 Timeline

The Second Main Unit Outage Phase covers the work from the completion of the First Main Unit Outage Phase to contract closeout. On-site work for the Second Main Unit Outage Phase may not begin until all of the following items are complete:

a. Work for the First Main Unit Outage Phase is successfully completed.

b. All required equipment is on-site.

c. The Government has turned over the Main Units to the Contractor.

See FAR Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK (APR 1984) contains the start and completion dates for the second main unit outage work window.

1.4.2 Equipment Staging

Prior to the second outage phase, all major materials and equipment must be staged on-site and ready for installation as required in paragraph Equipment Staging in the First Main Unit Outage Phase.

1.4.3 Work Tasks

The Second Main Unit Outage tasks for all units during the outage include all of the tasks in the First Main Unit Outage (except for delivery of spare parts and HPU) in addition to the following work tasks:

a. Rehabilitate Hydraulic Fluid Reservoir Tanks No. 1 and No. 2 - Clean and rehabilitate oil storage tanks No. 1 and No. 2. Dispose of the oil that is contained in each tank. Connect the tanks to the new hydraulic fluid headers. Fill each tank with new hydraulic fluid as specified in 35 05 40.15 26 HYDRAULIC FLUID.

b. Remove and dispose of the existing hydraulic power unit. Dispose of all existing hydraulic fluid contained within the hydraulic power unit.

c. Before installing the new hydraulic fluid headers, remove and dispose of all remaining existing hydraulic headers. Dispose of all existing hydraulic fluid contained within the headers.

d. Remove and dispose of the hydraulic fluid transfer piping between the hydraulic fluid reservoir tanks and the clean/dirty oil storage room (el. 329.50) transfer pump. Dispose of all existing hydraulic fluid that is removed. Hydraulic fluid transfer piping between the hydraulic fluid reservoir tanks and the clean/dirty oil storage room's transfer pump will not be replaced.

e. Split Oil Storage Room Tank - Dispose of all existing hydraulic fluid in the clean and dirty split oil storage tank. Clean the tank and piping that will remain. Once the tank and piping is clean, seal

SECTION 01 12 16.00 26 Page 6 it from contamination for future Government use.

f. Remove and dispose of the power and controls cables, and conduits related to the existing HPU system.

g. Remove and dispose of the power and controls cables, and conduits related to the existing in-line current transformers and synchronizing potential transformers.

h. Install, connect to new hydraulic header piping, fill with new fluid, field test, and perform commissioning of the new hydraulic power unit.

i. Remove all temporary hydraulic system equipment.

j. New Electrical Controls and Indication - Install and test the HPU Pump 120V AC and 125V DC controls, including the cable and conduit that runs the length of the Elevation 444 gallery for connecting to the individual control consoles, but not including the Actuator or SC-Board switches.

k. New Spare Hydraulic Cylinder - Deliver to site one new hydraulic cylinder to be used as a spare.

PART 2 PRODUCTS

Not used.

PART 3 EXECUTION

Not used.

-- End of Section --

SECTION 01 12 16.00 26 Page 7

SECTION 01 12 16.00 26 Page 8

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 05 00.00 26

BASIC ELECTRICAL MATERIALS AND METHODS

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 GENERAL REQUIREMENTS

1.3.1 Materials, Equipment and Installation

1.3.2 Standard Products

1.3.3 Corrosion Prevention

1.3.3.1 General

1.3.3.2 Fastenings and Fittings

1.3.3.2.1 Corrosion-Resisting Materials

1.4 DELIVERY, STORAGE, AND HANDLING

1.5 CONTRACT DRAWINGS

1.5.1 Departure From Drawings

PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

2.1.1 Compliance with Standards

2.1.2 Standard Products

2.2 CONDUIT, RACEWAYS, DUCTS, FITTINGS AND HANGERS

2.2.1 Rigid Metal Conduit

2.2.2 Liquid-Tight Flexible Metal Conduit

2.2.3 Rigid Metallic Conduit Fittings

2.2.4 Flexible Conduit Fittings

2.2.5 Conduit Hangers

2.3 MOTORS

2.4 MOTOR CONTROL CENTER BUCKET

2.4.1 Enclosure

2.4.1.1 Unit Compartments

2.4.1.2 Motor Control Center Doors and Covers

2.5 PUMP MOTOR SOFT STARTERS

2.5.1 Medium Voltage Soft Starter General

2.5.2 Auxiliary Contacts

2.5.3 Overload Relays

2.5.4 Individual Control Transformers

2.6 BOXES AND ENCLOSURES

2.6.1 Receptacle Boxes and Pull Boxes

2.6.2 Enclosures

2.7 MOLDED CASE CIRCUIT BREAKERS

2.7.1 Trip Units

2.7.2 480VAC Circuit Breakers

2.7.3 120/240VAC Circuit Breakers

2.7.4 125VDC Circuit Breakers

2.8 CONTROL EQUIPMENT

2.8.1 Terminal Blocks

SECTION 26 05 00.00 26 Page 1

2.8.1.1 Markings

2.8.1.2 Control Signal Type

2.8.1.3 Short-Circuiting Type

2.8.1.4 Power Terminal Blocks

2.8.2 Supplementary Circuit Breakers

2.8.3 Control, Instrument, and Selector Switches

2.8.3.1 General

2.8.3.2 Control Switches

2.8.3.3 Instrument Switches

2.8.3.4 Selector Switches

2.8.4 Relays

2.8.4.1 Control Relays

2.8.4.2 Timing Relays

2.8.4.3 Undervoltage Relays

2.8.5 Indicating Lamp Assemblies

2.8.6 Speed Display

2.8.7 Encoder

2.8.8 Oil Level Panel Meters

2.8.9 24VDC Power Supply

2.8.10 Control Transformer

2.8.11 Snap Action Limit Switch

2.8.12 Fuses

2.8.13 Fuseholders

2.9 INSTRUMENTATION

2.9.1 Pressure Switches

2.9.2 Pressure Transducer

2.9.3 Flow Switch

2.10 ESCUTCHEONS AND NAMEPLATES

2.11 INDICATING INSTRUMENTS

2.11.1 Hour Meter

2.12 SPARE PARTS

PART 3 EXECUTION

3.1 DEMOLITION, INSTALLATION, AND RECONFIGURATION

3.1.1 Demolition

3.1.1.1 Existing Hydraulic Power Unit

3.1.2 Installation

3.1.2.1 HPU Assembly

3.2 SEISMIC REQUIREMENTS

3.3 CONDUIT SYSTEM INSTALLATION

3.3.1 General

3.3.2 Thread Compound

3.3.3 Liquid-Tight Flexible Conduit

3.3.4 Cutting and Threading

3.3.5 Bends

3.3.6 Expansion Fittings

3.3.7 Coordination

3.3.8 Termination of Conduit

3.3.9 Grounding and Bonding of Conduit

3.3.10 Conduit Cleaning

3.3.11 Conduit Labeling

3.3.12 Conduit Inspection

3.4 MOTOR CONTROL CENTERS TESTS

3.4.1 Operational Tests

3.4.2 Short Circuit Tests

3.5 BOX AND ENCLOSURE INSTALLATION

3.5.1 General

3.5.2 Installation

SECTION 26 05 00.00 26 Page 2

3.6 ESCUTCHEONS AND NAME PLATE INSTALLATION

3.7 PAINTING

3.7.1 New Equipment

3.7.2 Existing Equipment

3.8 FIELD TESTING

3.8.1 Bump Tests

3.8.2 Performance Verification Test (PVT)

3.8.3 480V Breakers and Motor Starter

3.9 OPERATIONS AND MAINTENANCE DATA

SECTION 26 05 00.00 26 Page 3

SECTION 26 05 00.00 26 Page 4

SECTION 26 05 00.00 26

BASIC ELECTRICAL MATERIALS AND METHODS

PART 1 GENERAL

This Section covers the basic electrical materials and methods required for the Intake Gate Hydraulic System Upgrades.

This includes equipment to be furnished and installed under the following sections:

SECTION 26 05 19.00 26 INSULATED WIRE AND CABLE;

SECTION 35 05 40.14 26 HYDRAULIC POWER SYSTEM FOR CIVIL WORKS STRUCTURES;

SECTION 40 95 23.00 26 PROGRAMMABLE LOGIC CONTROLLER HARDWARE

1.1 REFERENCES

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI C39.1 (1981; R 1992) Requirements for Electrical Analog Indicating Instruments

ASTM INTERNATIONAL (ASTM)

ASTM A1011/A1011M (2018a) Standard Specification for Steel Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, and Ultra-High Strength

ASTM D709 (2017) Standard Specification for Laminated Thermosetting Materials

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C2 (2023) National Electrical Safety Code

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2021) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

NATIONAL ELECTRICAL CONTRACTORS ASSOCIATION (NECA)

NECA 101 (2013) Standard for Installing Steel Conduits (Rigid, IMC, EMT)

NECA/NEIS 1 (2015) Good Workmanship in Electrical Construction

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

ANSI C80.1 (2020) American National Standard for

SECTION 26 05 00.00 26 Page 5

Electrical Rigid Steel Conduit (ERSC)

NEMA 250 (2020) Enclosures for Electrical Equipment (1000 Volts Maximum)

NEMA FB 1 (2014) Standard for Fittings, Cast Metal Boxes, and Conduit Bodies for Conduit, Electrical Metallic Tubing, and Cable

NEMA ICS 1 (2022) Standard for Industrial Control and Systems: General Requirements

NEMA ICS 5 (2017) Industrial Control and Systems:

Control Circuit and Pilot Devices

NEMA ICS 6 (1993; R 2016) Industrial Control and Systems: Enclosures

NEMA ST 1 (1988; R 1994; R 1997) Specialty Transformers (Except General Purpose Type)

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2023; ERTA 4 2023; ERTA 5 2023; ERTA 6

2023) National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 489 (2016; Rev 2019) UL Standard for Safety Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures

UL 50 (2015) UL Standard for Safety Enclosures for Electrical Equipment, Non-Environmental Considerations

UL 508 (2018; Reprint Jul 2021) UL Standard for Safety Industrial Control Equipment

UL 514A (2013; Reprint Aug 2017) UL Standard for Safety Metallic Outlet Boxes

UL 514B (2012; Reprint May 2020) Conduit, Tubing and Cable Fittings

UL 6 (2007; Reprint Sep 2019) UL Standard for Safety Electrical Rigid Metal Conduit-Steel

UL 845 (2021) UL Standard for Safety Motor Control Centers

UL 360 (2013; Reprint Aug 2021) UL Standard for Safety Liquid-Tight Flexible Metal Conduit

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals having an "I" designation are for information only. A designation following the "G" or "I" designation identifies the office

SECTION 26 05 00.00 26 Page 6 that will review the submittal for the Government. The following must be submitted in accordance with SECTION 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Performance Verification Test Procedure ; G, HDC

SD-03 Product Data

Rigid Metal Conduit ; G, HDC

Liquid-Tight Flexible Metal Conduit ; G, HDC

Rigid Metallic Conduit Fittings ; G, HDC

Flexible Conduit Fittings ; G, HDC

Conduit Hangers ; G, HDC

Control, Instrument, and Selector Switches ; G, HDC

Receptacle Boxes and Pull Boxes ; G, HDC

Enclosures ; G, HDC

Molded Case Circuit Breakers ; G, HDC

Terminal Blocks ; G, HDC

Control Relays ; G, HDC

Timing Relays ; G, HDC

Indicating Lamp Assemblies ; G, HDC

Escutcheons and Nameplates ; G, HDC

Indicating Instruments ; G, HDC

Supplementary Circuit Breakers ; G, HDC

Speed Display ; G, HDC

Pressure Transducer ; G, HDC

Motor Control Center Bucket ; G, HDC

Control Transformer ; G, HDC

Pressure Switches ; G, HDC

Pump Motor Soft Starters ; G, HDC

Flow Switch ; G, HDC

Encoder ; G, HDC

Undervoltage Relays ; G, HDC

SECTION 26 05 00.00 26 Page 7

SD-10 Operation and Maintenance Data

Operations And Maintenance Data ; G, HDC

1.3 GENERAL REQUIREMENTS

1.3.1 Materials, Equipment and Installation

New materials and equipment must be furnished and any defective material or equipment damaged in the course of installation must be replaced or repaired. Testing must be performed to check the installation of and the proper operational functions of the electrical equipment. The installations must be in accordance with the National Electrical Code, NFPA 70 , and the National Electrical Safety Code, IEEE C2 , except where otherwise specifically shown or specified, in which case the drawings and specifications must govern. Omission of details on the drawings or in the specifications must not be construed as permitting deviations from Code requirements.

1.3.2 Standard Products

Material and equipment must be the standard products of manufacturers regularly engaged in the manufacture of these products and must essentially duplicate items that have been in satisfactory use for at least 5 years prior to proposal due date.

1.3.3 Corrosion Prevention

1.3.3.1 General

All equipment must be protected to prevent deterioration from corrosion.

The general requirements are specified below; however, other corrosion-resisting treatments that are the equivalent of those specified may be used. Materials used for corrosion prevention must be submitted for approval under SD-03 Product Data.

1.3.3.2 Fastenings and Fittings

Screws, bolts, nuts, pins, studs, springs, washers and other miscellaneous fastening and fittings must be of corrosion-resistant material or must be treated in an approved manner to render them resistant to corrosion. All fastenings which are to be exposed directly to the weather must be of corrosion-resisting material.

1.3.3.2.1 Corrosion-Resisting Materials

Corrosion-resisting steel, copper, brass, bronze, copper-nickel-copper alloys are acceptable corrosion-resisting materials.

1.4 DELIVERY, STORAGE, AND HANDLING

Ship the equipment and/or materials as completely assembled and wired as feasible so as to require a minimum of installation work. Each shipping section is properly match marked to facilitate reassembly. Provide equipment with removable lifting channels with eye bolts for attachment of crane slings to facilitate lifting and handling. Carefully pack and ship separately any relay or other device which cannot withstand the hazards of shipment when mounted in place on the equipment. Mark these devices with the number of the panel which they are to be mounted on and fully

SECTION 26 05 00.00 26 Page 8 identified. Wrap all finished painted surfaces and metal work to protect from damage during shipment. Prepare all parts for shipment so that slings for handling may be attached readily while the parts are in a railway car or transport truck. Ensure sections of equipment crated for shipment will pass though any limiting doors, passageways, or hatches including those that will be encountered when moving the equipment to the installation location. Carefully package and clearly mark all spare parts and accessories.

1.5 CONTRACT DRAWINGS

1.5.1 Departure From Drawings

Refer to variations as specified in SECTION 01 33 00 SUBMITTAL PROCEDURES. If any alternate equipment is approved, the Contractor must bear the cost and be responsible for furnishing and installing any additional wiring devices that are required.

PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

2.1.1 Compliance with Standards

Equipment shall be new and meet all applicable NEMA and UL construction and rating requirements. Critical components must be UL Listed. No equivalent will be acceptable. Immediately notify the Contracting Officer of any requirements of the specifications or Contractor proposed materials or assemblies that do not comply with UL Listed or NEMA standards.

International Electrotechnical Commission (IEC) rated equipment will not be considered an acceptable alternative to specified NEMA ratings.

2.1.2 Standard Products

Provide materials and equipment that are products of manufacturers regularly engaged in the production of such products which are of equal material, design and workmanship, and have been in satisfactory industrial use for 5 years prior to bid opening including applications of equipment and materials under similar circumstances and of similar size.

2.2 CONDUIT, RACEWAYS, DUCTS, FITTINGS AND HANGERS

2.2.1 Rigid Metal Conduit

Rigid metal conduit, including couplings, shall conform to UL 6 and/or ANSI C80.1 and must be zinc-coated both inside and outside by hot-dip galvanizing method.

2.2.2 Liquid-Tight Flexible Metal Conduit

Liquid-tight flexible metal conduit shall be made from steel strip that is zinc-coated by the hot-dip galvanizing method with an integral or separate bonding wire or and water-proof extruded PVC cover and conforming to UL 360 .

2.2.3 Rigid Metallic Conduit Fittings

Threaded fittings for rigid conduit shall be made of solid zinc or malleable iron and listed to UL 514B and/or NEMA FB 1 . Threadless fittings shall not be used. Malleable iron fittings must be zinc-coated

SECTION 26 05 00.00 26 Page 9 both inside and outside by hot-dip galvanizing method. Hubs must have a grounding screw on the locknut. Expansion fittings must have a maximum of 4 inches of travel and have external flexible copper braid bonding jumper.

2.2.4 Flexible Conduit Fittings

Flexible conduit fittings shall be made from steel or malleable iron with a zinc coating for flexible metal conduit with positive bonding, and conforming to UL 514B .

2.2.5 Conduit Hangers

Conduit hangers shall be fabricated from two or more galvanized steel hanger rods, a galvanized steel horizontal member, clamps, and other attachments as necessary for securing hanger rods and conduits. Hanger rods must not be smaller than 3/8-inch diameter and threaded either full length or for a sufficient distance at each end to permit at least 1-1/2 inches of adjustment. The horizontal member must be manufactured from hot rolled carbon steel with a galvanized finish conforming to ASTM A1011/A1011M . Hangers must be designed for hanging conduit. Conduit strut brackets must be made from a minimum of 12 gauge, hot rolled carbon steel with a galvanized finish conforming to ASTM A1011/A1011M .

2.3 MOTORS

Motors must be provided in accordance with SECTION 35 05 40.14 26

HYDRAULIC POWER SYSTEMS FOR CIVIL WORKS STRUCTURES.

2.4 MOTOR CONTROL CENTER BUCKET

2.4.1 Enclosure

Enclosure must fit into the existing motor control center location indicated in the drawings. Enclosure must be NEMA Type 12 gasketed.

Vertical section must be 20 inches deep and buses, control wiring, control transformers, small power transformers, terminal blocks, line terminals, cable supports, with clamps accessible from the front. Metal thickness for enclosures cannot be less than specified in NEMA ICS 6 without exception. Fabricate and bolt vertical edges of sections exposed to view so that the joints do not pass a 1/16 inch gage. Isolate individual compartments from adjacent compartments.

2.4.1.1 Unit Compartments

Provide each operating unit with equipment as shown on the drawings, mounted in an individual cell. The unit assembly, except main circuit breakers, panelboard and auxiliary control devices, shall be the drawout type removed from the front, without rear access or disturbing other units in the control center assembly. Ensure all drawout type unit assemblies have a positive guide rail system to ensure alignment of connection to vertical bus. Mechanically interlock units with the door to prevent removal while in the energized position. Provide each removable unit with a provision for padlocking in a position in which it is disconnected from the vertical bus, although not removed from the stationary structure.

Provide all ventilating openings with corrosion-resistant insect-proof screens on the inside.

SECTION 26 05 00.00 26 Page 10

2.4.1.2 Motor Control Center Doors and Covers

Provide each unit compartment with flange-formed. Prevent door sag by proper alignment of hinges made of sufficiently strong material.

Interlock the door fastenings to prevent opening when the equipment is energized. Ensure the external operating handle clearly indicates whether the equipment is in an "ON", "OFF" or "TRIPPED" position.

2.5 PUMP MOTOR SOFT STARTERS

Medium voltage soft starters must conform to UL 845 and NFPA 70 . Install soft starters in new enclosures on unistrut near pumps.

2.5.1 Medium Voltage Soft Starter General

Reduced voltage starters must conform to the requirements for full-voltage controllers and to the following additional requirements.

a. Solid State soft-start starters must be three phase SCR controlled for stepless reduced voltage starting of induction motors. Starter must have starting current of 300 percent of full load amps for thirty seconds, bypass/isolation contactor, and three phase thermal overload relay.

b. Provide overload devices, one in each motor phase conductor, that fully protect the motor during all phases of motor starting. Starter contacts must be rated to withstand the switching surges during selector to full voltage. Starter must contain the necessary sensing and timing devices to monitor motor operation and select the correct time for selector to full voltage.

c. For solid-state starters, provide a means for adjusting the starting torque from 0 to 85 percent of locked rotor torque.

2.5.2 Auxiliary Contacts

Provide each controller with a minimum of three sets of NO and NC auxiliary or three form "C" contacts.

2.5.3 Overload Relays

Except as otherwise indicated, provide each controller with three-phase NEMA Class 20 thermal overload relays with external manual reset. Solid state or electronic overloads are acceptable.

2.5.4 Individual Control Transformers

Where 120 volt ac control of contactors is indicated or required, provide an individual control transformer on the load side of the unit breaker.

The control transformers must be rated 480-120 volts and conform to the requirements for control transformers in NEMA ST 1 and have adequate volt-ampere capacity for the control functions indicated. Except as otherwise indicated on the drawings, provide each control transformer with a fuse in one secondary lead and have the other secondary lead grounded.

SECTION 26 05 00.00 26 Page 11

2.6 BOXES AND ENCLOSURES

2.6.1 Receptacle Boxes and Pull Boxes

Provide receptacle boxes and pull boxes made of malleable iron conforming to UL 514A with threaded fittings and must be zinc-coated both inside and outside by hot-dip galvanizing method.

2.6.2 Enclosures

Provide stainless steel NEMA Type 4X enclosures that conform to UL 50 and NEMA 250, made from a minimum of 1214 Standard Gage thickness and painted Munsell color system 5BG 7/0.4 high gloss (ANSI No. 70 gray) , with provisions for locking. Piano type hinges are not acceptable for enclosure doors.

2.7 MOLDED CASE CIRCUIT BREAKERS

Molded case circuit breakers shall conform to the applicable requirements of UL 489 . The circuit breakers shall be manually-operated, shall be quick-make, quick-break, common trip type, and shall be of automatic-trip type unless otherwise specified or indicated on the drawings. All poles of each breaker shall be operated simultaneously by means of a common handle. The operating handles shall clearly indicate whether the breakers are in "On," "Off," or "Tripped" position and shall have provisions for padlocking in the "Off" position. Personnel safety line terminal shields shall be provided for each breaker. The circuit breakers shall be products of only one manufacturer, and shall be interchangeable when of the same frame size.

2.7.1 Trip Units

Except as otherwise noted, the circuit breakers, of frame sizes and the trip unit ratings as shown on the drawings, shall be provided with combination thermal and instantaneous magnetic or solid state trip units.

The Government reserves the right to change the indicated trip ratings, within frame limits, of the trip devices at the time the shop drawings are submitted for approval. Submit outline drawings of all equipment to be furnished under this contract, together with weights and overall dimensions for approval. The breaker trip units shall be interchangeable and the instantaneous magnetic trip units shall be adjustable on frame sizes larger than 150 amperes and shall be set at approximately 10 times the continuous current ratings of the circuit breakers.

2.7.2 480VAC Circuit Breakers

Circuit breakers for 480VAC circuits shall be rated 600VAC, and shall be an UL listed minimum interrupting capacity of 22,000 symmetrical amperes at 600 VAC.

2.7.3 120/240VAC Circuit Breakers

Circuit breakers for 120VAC circuits shall be rated not less than 120/240 or VAC, and shall be an UL listed minimum interrupting capacity of 22,000 symmetrical amperes at 600 VAC.

2.7.4 125VDC Circuit Breakers

Circuit breakers for 125VDC circuits shall be two-pole, rated 125/250VDC

SECTION 26 05 00.00 26 Page 12 or 125VDC, and shall be an UL listed minimum interrupting capacity of 22,000 symmetrical amperes at 250VDC.

2.8 CONTROL EQUIPMENT

2.8.1 Terminal Blocks

2.8.1.1 Markings

Each connected terminal must have the circuit designation or wire number marked on or near the terminal in permanent contrasting color. White or other light-colored plastic marking strips, fastened by screws to each terminal block, must be provided for control wire designations. The manufacturer's wire number and the Government's wire number must both be shown for each connected terminal on the marking strips with permanent marking fluid. The marking strips must be reversible to permit marking both sides, or two marking strips must be furnished with each block, to accommodate the two sets of wire numbers.

2.8.1.2 Control Signal Type

Provide control signal type terminal blocks of double row terminal type rated for 600 volts and 30 amps. Terminals must be plated brass with #8-32 phil-slot screws that can accept lugs with a maximum width of 0.42-inches.

2.8.1.3 Short-Circuiting Type

Provide short-circuiting type terminal blocks for all current transformer secondary leads with provisions for shorting together all leads from each current transformer without opening any circuit. Short-circuiting the terminals of only one current transformer must not short-circuit the terminals of any other current transformer.

2.8.1.4 Power Terminal Blocks

Provide power distribution blocks for branch circuits and feeders 600 volts and less, with a minimum rating of 30 amps and accommodate wire size #12 AWG and larger. Power distribution blocks must be double row type and have lugs suitable for copper conductors, must be two-pole for single-phase circuits (phase and neutral conductors, or two phase conductors), and three-pole for three-phase circuits (three phase conductors). Three-phase four-wire circuits, where used, must have a three-pole block for the phase conductors and a single-pole block for the neutral, which must be mounted next to the block for the phase conductors.

For conductors rated more than 50 amperes, screws must have hexagonal heads. Conducting parts between connected terminals must have adequate contact surface and cross-section to operate without overheating.

2.8.2 Supplementary Circuit Breakers

Supplementary AC circuit breakers must be rated not less than 120 volts AC, and must have a UL listed minimum interrupting capacity of 20,000 symmetrical amperes at 120 volts AC. Supplementary DC circuit breakers must be rated not less than 125 volts DC, and must have a UL listed minimum interrupting capacity of 20,000 symmetrical amperes at 125 volts DC. Circuit breakers must be cable-in/cable-out type suitable for DIN rail mounting. Terminals must be able to accept up to a No. 6 AWG wire.

SECTION 26 05 00.00 26 Page 13

2.8.3 Control, Instrument, and Selector Switches

2.8.3.1 General

Control, instrument and selector switches shall be of the rotary switchboard type with handles on the front and operating contact mechanisms on the rear of the panels, rated for alternating-current operation at 600 V, or direct-current operation at 250 V, as applicable, in accordance with the switch development specified in the contract drawings. All switches and contacts must be capable of satisfactorily withstanding a life test of at least 10,000 operations with rated current flowing in the switch contacts, and must be capable of continuously carrying 20 A without exceeding a temperature rise of more than 30 degrees C above ambient. Each switch provided must have ample contact stages, including spare contacts, to perform the functions of the control system.

Contacts of switches must be self-aligning and must operate with a wiping action. A positive means of maintaining high pressure on closed contacts must be provided. Compression springs or pivoted joints must not be depended upon to carry current. The covers or plates on the switches must be readily removable for inspection of contacts. Each switch must be provided with an escutcheon clearly marked to show each operating position. Switch identifications and handle positions must be engraved on escutcheons or may be provided on separate nameplates. Switches must be provided with black oval handles unless otherwise specified on the contract drawings.

2.8.3.2 Control Switches

Control switches shall be two or three-position momentary-contact type with spring return to neutral position with black pistol-grip handles, or as required by the contract drawings.

2.8.3.3 Instrument Switches

Instrument switches shall be the maintained-contact type with the required number of positions. Ammeter switches must not open the secondary circuits of current transformers at any time.

2.8.3.4 Selector Switches

Selector switches shall be of the maintained-contact type, remaining in the last position until deliberately moved to another position, unless shown otherwise on the contract drawings.

2.8.4 Relays

2.8.4.1 Control Relays

Provide control relays designed for panel mounting, with the capability of add-on contact blocks conforming to NEMA ICS 5 . Relays incorporating plug-in modules will not be acceptable. The contact class and rating designations must be A600 for AC control circuit contacts, and P600 for DC control circuit contacts. The Auxiliary relay salient physical, functional, or performance characteristics an equal item must meet to be acceptable are as follows:

a. Have convertible contacts.

b. Have contacts that are double break and silver alloy.

SECTION 26 05 00.00 26 Page 14

c. Have contacts that are convertible from normally open to normally closed or vice versa.

d. Have contacts that are color coded to indicate status.

e. Are expandable from 2 poles to 12 poles.

f. Have accessories to provide pneumatic timing and mechanical latching provisions as needed.

g. Have coils that are molded construction and continuous duty rated.

h. Have transient suppressor accessory available.

i. Coil for use in 125V dc circuits must be designed to operate at 140V dc continuously.

2.8.4.2 Timing Relays

Timing relays shall be designed for panel mounting and conform to UL 508 .

Relays incorporating plug-in modules will not be acceptable. The contact class and rating designation must be A600 for AC control circuit contacts, and P600 for DC control circuit contacts. Timing relays shall have the following salient physical, functional, or performance characteristics as follows:

a. Have a temperature operating range of -20 degrees Celsius to +165 degrees Celsius.

b. Have contacts that are rated for 20 Amps with a minimum life of 100,000 operations.

c. Have a timing range described in the contract drawings.

d. Have an oversized adjustment knob that is easy to adjust with markings visible from all angles.

e. Have snap-action switch assembly with DTDP arrangement.

f. Have coils that are of potted construction and have an operating voltage range of 102 - 132 V AC T 60 Hz.

g. Relay must have surge/transient protection.

2.8.4.3 Undervoltage Relays

Undervoltage relay (device 27) must have a minimum setpoint pickup range of 75 percent to 100 percent of normal voltage with a minimum 2 NO and 2 NC contacts rated at 5A continuous at 120VAC.

2.8.5 Indicating Lamp Assemblies

Indicating lamp assemblies shall be of the LED switchboard type, rated for 125V DC and 120V AC service, with appropriate colored caps. The lamp assemblies must be a minimum of 1-inch diameter and the LED must be long-life LED type with a minimum normal life span of 50,000 hours. Color caps must be made of material, which will not be softened by the heat from the lamps. Indicating lights must be visible from at least 20 ft. away.

SECTION 26 05 00.00 26 Page 15

Lamps must be replaceable from the front of the panels, and any special tools required for lamp replacement must be furnished. All color caps must be similar and interchangeable, and all lamps must be of the same type and rating.

2.8.6 Speed Display

Install a speed display meter to display intake gate as shown on the contract drawings. Meter must be rated for 24VDC or 120VAC input voltage. Meter shall accept a RS-422 input from a speed encoder and perform internal logic to determine and display gate speed in feet per second. The meter must have numerical digital display capable of displaying speed in the format of XXX.XX feet per second. Submit for approval the custom scaled display.

2.8.7 Encoder

Provide and program new direct mount, absolute rotary encoders for tracking of the gate at the gate speed indicator. The rotary encoder shall be of the magnetic or optical type. The encoder shall have a zero-set and direction setting features. The encoder shall increase the count when turning in the direction which causes the gate to raise. The encoder must have a speed signal output compatible with the speed display input. The supply voltage shall be capable of accepting 120VAC or 24VDC. The encoder must be capable of tracking the full range of the gate operation.

Contractor shall select shaft type and size based on in-field conditions.

Utilize the manufacturer's pre-fabricated shielded cable for connection to the encoder. Select the appropriate cable length to allow the encoder cable to connect to the speed display.

The encoder shall be driven by the position indicator shaft via a coupling.

2.8.8 Oil Level Panel Meters

Provide panel meters that are suitable to use as level meters and have the following salient features:

a. 6 inch circular bar graph type with tri-color LED segments.

b. Rated for 120 VAC supply power.

c. A four digit, alphanumeric display that is centered in the circular bargraph. Digits must be 0.35" or more in height.

d. Inputs that accept 4-20 milliamp analog signal.

e. Gauge face must indicate that the meter is indicating oil level in inches.

f. 4-20mA signal retransmit output.

2.8.9 24VDC Power Supply

The DC power supply shall be din-rail mounted and UL listed. The power supply shall have an input voltage of 120VAC, as shown on contract drawings, output voltage of 24VDC. Power supply must have an alarm contact rated for 120VAC.

SECTION 26 05 00.00 26 Page 16

2.8.10 Control Transformer

The control transformer shall be standard, single-phase, 60-Hz, dry-type, 480/120 volts, and with a kVA rating sufficient to supply the control circuits with a minimum 25 percent spare capacity. Transformer must have two primary and one secondary fuse. Minimum size allowed is 150 VA.

Transformer shall meet applicable requirements of NEMA ST 1 .

2.8.11 Snap Action Limit Switch

Limit switch must have sufficient contacts for the operation shown on the control schematics, rated for at least 3A at 125VDC or 120VAC. Limit switch must be compact switch with an enclosed micro-gap snap action contact mechanism that makes a specified motion with a specified force to open/close the contact. Limit switch must be heavy-duty and rated NEMA 4X.

2.8.12 Fuses

Control power fuses shall be FRN for ratings above 10 amperes and FNQ for 10 amperes and below.

2.8.13 Fuseholders

Fuseholders shall be of the same manufacturer as the terminal blocks and be disconnect type with blown fuse indicator and din rail mounted. Fuses shall be rated for 150VAC with a maximum size of 10 Amps.

2.9 INSTRUMENTATION

2.9.1 Pressure Switches

Provide mechanical pressure switches. Pressure switch adjustment range must equal or extend beyond a 500 psi to 3000 psi window psi . Enclose the switches in watertight, galvanized or stainless steel, NEMA 4X housings.

Provide the switches with at least one form C contact having a minimum rating of 5 amps, 120VAC.

2.9.2 Pressure Transducer

The sensing element shall be either capsule, diaphragm, bellows, Bourdon tube, or solid state as applicable for the installation. The pressure transducer shall withstand up to 300 percent of rated pressure, with an accuracy of plus or minus 1.0 percent of full scale selected to put the design range of the measured pressure in the middle third of the transducer's range. Pressure shall be measured in psi gage with a range, plus or minus 10 percent of design range and shall be furnished with display to the nearest 0.145 psi . The transmitter output error shall not exceed 0.1 percent of calibrated span. Sensor shall have 4-20mA output, be loop powered.

2.9.3 Flow Switch

Flow switch shall have a repetitive accuracy of plus or minus 10 percent of actual flow setting. Switch actuation shall be adjustable over the operating flow range. Flow switch for use in environmentally acceptable lubricant (EAL) system and constructed of suitable materials for installation in the environment encountered. The flow switch shall have non flexible paddleor shuttle/piston with Form C snap action contacts, SECTION 26 05 00.00 26 Page 17 rated in accordance with NEMA ICS 1 . The flow switch must be rated for 3000 psi at minimum. It must maintain reliable operation and sealing at this pressure.

2.10 ESCUTCHEONS AND NAMEPLATES

a. Provide nameplates made from melamine plastic conforming to

ASTM D709.

b. Nameplates must be 0.125 inch thick, black with white center core.

Surface must be matte finish. Corners must be square. Accurately align lettering and engrave into the core. Minimum size of nameplates must be 1 inch by 2.5 inches. Lettering must be a minimum of 0.25 inch high, normal block style.

c. Plates must be fastened with black-finished or silver-finished, corrosion-resisting, round-head machine screws or approved nonadhesive metal fasteners.

d. Spare locations, such as spare breakers, must have blank nameplates installed, that can be engraved in the future.

2.11 INDICATING INSTRUMENTS

Electrical indicating instruments shall be of the switchboard type conforming to the applicable requirements of ANSI C39.1 and the accuracy rating must be within 1 percent of full-scale value. The instruments must be back-connected semiflush mounting. Instrument cases must be dust tight with shadow-proof covers and anti-glare windows. Taut-band suspension must be provided where this design is available. Zero adjustments accessible from the front without removal of covers must be provided for instruments with spring control. AC instruments must be designed and calibrated for use on 60-Hz circuits and for operation from 120-volt secondaries of voltage transformers and 5-ampere secondaries of current transformers, as shown.