Table of Contents
Section | Title | Page | ||
| Purpose | 3 | |||
| Scope | 3 | |||
| Related Documents | 3 | |||
| Materials and Equipment | 4 | |||
| General | 4 | |||
| Substitution of Materials | 4 | |||
| Conduit | 4 | |||
| Electrical Boxes and Conduit Fittings | 5 | |||
| Wire and Cable (Power and Control Over 32v) | 6 | |||
| Motor Starters and Contactors | 6 | |||
| Manual Starters | 7 | |||
| Pushbuttons, Selector Switches, and Indication Lights | 7 | |||
| Panelboards, Lighting Fixtures, and Convenience Receptacles | 7 | |||
| Receptacles and Ground Fault Interrupters | 7 | |||
| Installation of Dedicated Neutrals | 7 | |||
| Grounding Equipment | 8 | |||
| Terminal Lugs | 8 | |||
| Terminal Blocks | 9 | |||
| Hardware | 9 | |||
| Miscellaneous | 10 | |||
| Air Products Furnished Equipment/Materials (Handling and Installation) | 10 | |||
| Installation Procedures | 11 | |||
| Conduit and Cable | 11 | |||
| Conduit Entry into Equipment | 12 | |||
| Wiring | 12 | |||
| Splices in Wiring | 13 | |||
| Taping of Lugs and Busses | 13 | |||
| Torquing of Bolted Connections | 14 | |||
| Spare Wires | 14 | |||
| Protection of Wiring | 14 | |||
| Low Voltage Wiring | 14 | |||
| Cable Tray and Cable | 16 | |||
| Bus Duct | 17 | |||
| Labeling (Wire and Cable) | 17 | |||
| Labeling of Electrical Areas and Equipment | 18 | |||
| Patching, Replacement, and Modification of Existing Work | 19 | |||
| Section | Title | Page
| |
| Working on Incoming Power System (During Construction) | 20 | ||
| Location of Safety Grounds | 20 | ||
| Safety Work Permit System for Safety Grounds | 20 | ||
| Method of Attachment | 21 | ||
| Communication with Power Supplier | 21 | ||
| Removal of Safety Grounds | 21 | ||
| Inspection and Testing | 21 | ||
| Wiring and Terminations | 23 | ||
| Testing Oil-Filled Transformers | 23 | ||
| Testing Vacuum and Gas Circuit Breakers | 23 | ||
| Testing Motors | 23 | ||
| Testing and Inspection of Grounding Electrode System | 23 | ||
| Insulation Resistance Test | 24 | ||
| User Tests | 24 | ||
| Change Log | 25 | ||
| Insulation Resistance Test Results | 26 | ||
| Grounding Electrode Conductor Resistance Test Results | 27 | ||
This article is about for the minimum requirements for material, installation, and testing of an electrical system.
2. SCOPE
2.1 The contractor shall provide all labor, services, tools, materials, and equipment (other than that specifically called out on the contract drawings and specifications as being provided by Air Products) necessary to install a complete and operative electrical system according to the contract drawings, this specification, the latest issues of the National Electrical Code and all other applicable codes, manufacturers’ drawings and instructions, and the direction of the Air Products field representative.
2.2 This specification is intended for use within the United States.
2.3 Any conflict between the various standards, codes, specifications, and the contract drawings shall be brought immediately to the attention of the Air Products field representative.
2.4 The requirements of this specification shall be applied to the supply and installation of all materials and equipment as shown on the contract drawings or as listed in 600.002. The requirements of 600.002 shall supplement the contract drawings. Requirements that are in conflict with the contract drawings shall be brought to the immediate attention of an Air Products field representative.
3. RELATED DOCUMENTS
3.1 Air Products Engineering Documents
4WCE-600001 General Scope of Work for Construction Contracts
600.002 General Project Data (project specific)
4AEL-620100 Electrical Equipment Commissioning
4AEL-620102 Commissioning: High Voltage Circuit Breakers/Contactors/Switches and Control
4AEL-620103 Commissioning: Substations and Outdoor Bus Structures
4AEL-620104 Commissioning: Substations High Voltage Oil/Vacuum/Gas Circuit Breakers
4AEL-620105 Commissioning: Liquid-Filled Transformers
4AEL-620106 Commissioning: Rotating Equipment – Motors greater than 600 HP
4AEL-620107 Commissioning: Low Voltage Distribution Systems/Motor Control Centers/Load Centers/Auto-Transfer Switches
4AEL-620108 Commissioning: Low Voltage Power and Control Distribution Equipment
4AEL-620109 Commissioning: Uninterruptible Power System, Batteries and Chargers
4AEL-620110 Commissioning: Emergency Generators
4AEL-620111 Commissioning: Bus Duct Systems
4AEL-620112 Commissioning: Grounding Systems
4AEL-620301 Hazardous Area Requirements for Class I Areas
4AEL-620302 Standard Wire and Cable Types
4AEL-620303 Installation and Testing of Medium Voltage Cable
STD-G309A Electrical Standard – Grounding Cable Trays
STD-G310A Electrical Standard – Grounding Conduit to Cable Tray
STD-P306A Electrical Standard – Conduit Connection Solenoid Valve
STD-P308A Electrical Standard – Conduit Connection to Pigtailed Switch
STD-P309A Electrical Standard – Conduit Connections to Field Devices – Class I Hazardous Area
STD-P331A Electrical Standard – Cable Tray Supports
STD-P338A Electrical Standard – Low Point Drain Installation Details
STD-S304A Sheets 3 & 4 – Electrical Standard – Symbols – Welding & Power Receptacles
3.2 Institute of Electrical and Electronic Engineers (IEEE)
81 Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Grounding System – latest edition
837 Qualifying Permanent Connections Used in Substation Grounding
3.3 Instrument Society of America (ISA)
3.4 National Electrical Manufacturers Association (NEMA)
C82.9 American National Standard for Lamp Ballasts— High-Intensity Discharge and Low-Pressure Sodium Lamps— Definitions
VE 2 Cable Tray Installation Guidelines
3.5 National Fire Protection Association (NFPA)
70 National Electrical Code (NEC) – Latest Edition
3.6 NETA (International Electrical Testing Association)
ATS-2013 Acceptance Testing Specifications
4. MATERIALS AND EQUIPMENT
4.1 General
Equipment and materials to be supplied and installed by the contractor must meet the highest quality standards, be free from defects and flaws, and should be newly manufactured and unused. They should align with the specifications outlined in this document or on the contract drawings. Whenever feasible, electrical materials and equipment should carry the certification of Underwriters’ Laboratories, Inc. (UL).
Material Substitution: The contract drawings and specifications include manufacturers’ catalog numbers as a reference for quality and grade. The design specifics are based on these specified materials or equipment. Equivalent materials or equipment from other manufacturers may be considered for substitution, unless explicitly marked as “No Substitution.”
For areas classified as electrically hazardous, all equipment and materials used must be approved for such environments and installed following approved methods. Additionally, all equipment and devices must bear the appropriate approval labels. If not otherwise specified in the contract drawings or through the inclusion of a Hazardous Area Classification drawing, it will be assumed that the installation is intended for a non-hazardous location.
4.2 Conduit
Unless otherwise specified in the Electrical contract drawings, the conduit used shall be as follows:
- Rigid Galvanized Steel Conduit (RMC): Conduit, elbows, couplings, and related fittings must have an outer layer of zinc for protection and an inner layer of zinc, enamel, or an equivalent corrosion-resistant material.
- Rigid Aluminum Conduit (RMC): Conduit, elbows, couplings, and similar fittings must be made of a corrosion-resistant aluminum alloy with no more than 0.4% copper content.
- Liquid-Tight Flexible Metal Conduit (LFMC): Flexible conduit must feature a liquid-tight, PVC outer jacket covering a flexible galvanized steel core. This conduit should be rated for 105°C, type ATLA, and include an integral ground wire up to 1-1/4″, with fully interlocking strips up to 4″. No substitutions are allowed. This conduit is suitable for use in Class 1, Division 2 hazardous areas as specified in Article 501-30(b) of the NEC.
- Electrical Metallic Tubing (EMT): Tubing and fittings must be either steel or aluminum and have protective coatings or alloys consistent with those specified for rigid steel or aluminum conduit. Fittings should be of the compression type. Note that EMT conduit is only permitted for indoor, non-process area applications (e.g., offices, maintenance areas, electrical rooms, or control rooms).
- Rigid Metal Conduit, Steel, Plastic Coated (RMC/PVC): Conduit, elbows, couplings, and related fittings should have outer and inner protective zinc coatings, along with a 40 mil polyvinyl chloride (PVC) coating bonded to the outer surfaces.
- Rigid Nonmetallic Conduit (RNC): This conduit should meet the following specifications: Schedule 40, 90°C rated, wire-rated, heavy wall, rigid plastic conduit. An example of an acceptable product is Carlon PV-DUIT or an equivalent.
4.3 Electrical Boxes and Conduit Fittings
Electrical technical specifications for pull boxes, terminal boxes, equipment enclosures, receptacle, switch, and junction boxes, as well as conduit fittings:
Pull Boxes:
Pull boxes must be made of standard gauge galvanized steel, aluminum, fiberglass, or stainless steel, as specified in the contract drawings. They should have captive stainless steel cover screws and a neoprene gasket attached to the cover. All pull boxes located in wet or outdoor areas must meet weatherproof standards and have a NEMA type 4X rating, as indicated on or referenced through the contract drawings.
Terminal Boxes and Equipment Enclosures:
Terminal boxes and equipment enclosures should be constructed of NEMA-rated galvanized steel, aluminum, fiberglass, or stainless steel, as indicated in the contract drawings. They must feature a hinged door and a removable mounting panel or terminal straps, as specified. Additionally, a 12 mm (½”) stainless steel drain fitting, such as Hubbell #DPE-30-29-S3 or an equivalent, should be installed in the bottom of all outdoor enclosures. The selection of enclosure rating should be based on the following criteria:
- NEMA 1: General indoor use
- NEMA 4: Indoor use in areas where equipment is frequently exposed to water hose-down
- NEMA 4X: General outdoor use and locations prone to corrosion
- NEMA 7: Hazardous locations as required
- NEMA 12: General indoor use
Receptacle, Switch, and Junction Boxes:
For dry, indoor locations, receptacle, switch, and junction boxes must be made of standard gauge galvanized steel with captive screw-fastened covers. Cast boxes with threaded hubs and gasketed rain-tight covers, such as Crouse-Hinds or Appleton FD or FS, should be used in wet or outdoor locations.
Conduit Fittings (Rigid Galvanized Steel Conduit):
Conduit fittings for rigid galvanized steel conduit should be Crouse-Hinds Form 8 with gasketed covers, retained cover screws, threaded hubs, or Appleton FM 8 Grayloy-iron with FG series cast cover and neoprene gasket. For conduit systems containing 4/0 AWG (American Wire Gauge) conductors or larger, and high voltage cables, Crouse-Hinds or Appleton “Mogul” series fittings should be used.
Conduit Fittings (Rigid Aluminum Conduit):
Conduit fittings for rigid aluminum conduit should be Crouse-Hinds Mark 9 with gasketed covers, retained cover screws, threaded hubs, or Appleton FM85 with cast cover and neoprene gasket. When aluminum fittings terminate on rigid galvanized steel conduit, threads should be coated with zinc chromate to minimize galvanic reaction between the dissimilar metals.
4.4 Wire and Cable (Power and Control over 32V)
Electrical technical specifications for wire and cable are as follows:
4.4.1 Wire and Cable Requirements:
The wire and cable provided and installed by the engineering contractor should adhere to the electrical design drawings and the guidelines outlined in this paragraph. All wire and cable, excluding thermocouple wire, must be constructed with stranded conductors. The use of solid conductor wire is not permitted. Unless otherwise indicated on the design drawings, the minimum size for power and lighting wire should be #12 AWG, while control wire should be #14 AWG.
In specific cases where #14 AWG wire is too large for terminals on instrumentation and other electronic devices, an appropriate size may be used. Insulation color coding should follow the standards outlined below:
- White and green wire colors are mandatory according to the National Electrical Code (NEC), and no exceptions are allowed for these wire colors.
- For multi-conductor power and control cables, the standard manufacturer’s wire surface coloring is acceptable, with the exception of white and green, as specified above.
- Once a wire color scheme is established within a control system, it must remain consistent throughout.
4.4.2 Thermocouple and Instrument Wire Color Codes:
Refer to paragraph 5.3.3 for thermocouple and instrument wire color codes.
4.4.3 Standard Wire and Cable Types:
For standard wire and cable types.
| Application | Surface Color |
| AC Power | Black |
| AC Neutral | White |
| Equipment Ground | Green |
| AC Control or switched AC | Red |
| DC Control/Power (over 32V) | Yellow |
| Current Transformer | Blue |
| Isolated ground (Iso-ground) | Green (with visible ends taped with orange tape as identified in the following) |
4.5 Motor Starters and Contactors
Here is the electrical technical specifications for magnetic starters:
Magnetic Starters:
The engineering contractor or installer shall provide magnetic starters that meet the following requirements:
- The starters must be a minimum of NEMA Size 1.
- Each starter should include a thermal overload relay heater element for each ungrounded conductor.
- The thermal overload relay heater elements must be of the bimetallic type and ambient-compensated.
- These elements should be specifically rated for the motor nameplate full-load current and the ambient temperature within the starter enclosure.
- Unless otherwise specified, the nominal operating coil voltage should be rated at 120 volts and 60 Hertz.
- In cases where starters are used with available line voltage exceeding 120 volts, the contractor must include a control transformer to provide a 120-volt operating voltage from line conductors, unless otherwise specified.
Additional Components:
The engineering contractor or installer shall also provide the following components for all magnetic starters, including motor control centers:
- Ambient-compensated, bimetallic-type thermal overload relay heater elements.
- Fuse reducer clips if deemed necessary.
- Fuses sized specifically for the motor nameplate full-load current and service factor.
- Fuses must be rated according to the contract drawings and possess a minimum interrupting capacity of 200,000 amperes.
4.6 Manual Starters
Here is electrical technical specification for manual starters:
Manual Starters: For unit heaters, ventilation fans, or other single-phase motors, the contractor shall provide manual starters meeting the following criteria:
- The manual starters must be of the double pole, single throw type.
- Each starter should include one thermal overload relay heater element that is specifically rated for the motor’s nameplate full-load current and the ambient temperature within the starter enclosure.
4.7 Pushbuttons, Selector Switches, and Indicating Lights
Here’s the electrical technical specification for push buttons, selector switches, and indicating lights:
Control Devices:
The engineers are responsible for supplying all push buttons, selector switches, and indicating lights in accordance with the electrical contract drawings. Each of these devices should be equipped with a laminated plastic legend plate that clearly denotes its function, as well as the name or identification number of the equipment or device it controls.
4.8 Panelboards, Lighting Fixtures, and Convenience Receptacles
Here’s the electrical technical specifications:
Lighting Fixtures:
Lighting fixtures shall be as specified in the electrical contract drawings. Each fixture shall be provided complete, including all necessary accessories such as lamps, ballasts, and mounting brackets.
Transformers:
For process power, lighting, and miscellaneous power dry-type transformers, the voltage and kilovolt-ampere (kVA) ratings shall be in accordance with the contract drawings. Additional characteristics are as follows:
- Single-phase transformers up to and including 25 kVA shall have 2% to 5% taps below normal; above 25 kVA, 4% to 2-1/2% taps below normal.
- Three-phase transformers up to and including 30 kVA shall have 2% to 5% taps below normal; above 30 kVA, 4% to 2-1/2% taps below normal.
- All three-phase transformers shall have a Delta primary and Wye secondary configuration.
- Insulation with a temperature rating of 185°C (115°C rise) shall be used for single-phase transformers between 5 kVA and 25 kVA, as well as three-phase transformers between 3 kVA and 15 kVA.
- Insulation with a temperature rating of 220°C (150°C rise) shall be used for single-phase transformers between 37-1/2 kVA and 167 kVA, and three-phase transformers between 30 kVA and 150 kVA.
- Enclosures shall be suitable for the specific installation location.
- Transformers shall meet all requirements specified by NEMA C82.9.
Lighting Panel Boards:
Lighting panel boards shall be of the factory-assembled, dead-front safety type, equipped with bolt-in type single, 2-pole, or 3-pole branch circuit breakers. The mains shall be arranged for a grounded, solid neutral system with a main circuit breaker, unless otherwise indicated. When necessary, the neutral bus shall be insulated to prevent contact with grounded surfaces within the enclosure. The grounding bus shall be securely bonded to the panel enclosure. Refer to the contract drawings for details regarding the number of branches, system voltages, and required enclosures.
Receptacles and Ground Fault Interrupters:
Receptacles and wall switches shall conform to the specifications provided in the contract drawings. All convenience receptacles located in lavatories, kitchens, maintenance areas, outdoors, and temporary construction power sites shall be protected by a 5 mA personnel protection type ground-fault interrupting (GFCI) circuit breaker or integral ground fault receptacle. A ground wire shall be installed with each lighting and convenience receptacle circuit. It should be noted that metallic conduit is not relied upon as the sole ground path.
Installation of Dedicated Neutrals:
Every lighting and convenience receptacle circuit shall have a separate, dedicated neutral. The use of multiwire branch circuits is prohibited. Wiring for lighting and convenience receptacle circuits shall be clearly tagged with the corresponding panelboard circuit breaker number. To facilitate identification, the hot and neutral wires for these circuits shall be labeled with the suffix “H” and “N,” respectively..
Heat Tracing Circuit Breakers:
All circuit breakers serving heat tracing circuits shall be of the 30 mA equipment protection ground fault interrupting (GFP) type.
4.9 Grounding Equipment
Ground Rods:
Ground rods shall be constructed with a copper surface covering a steel core, having a diameter of 19 mm (3/4 in) (Copperweld type). For ground rods exceeding a length of 3 m (10 ft), threaded rod sections of 3 m (10 ft) shall be securely joined using threaded couplings. The contractor shall supply all necessary driving studs for the installation of ground rods.
Ground Wire
Ground wires shall be fabricated from bare, soft-drawn stranded copper with a conductivity rating of 100% International Annealed Copper Standard (IACS) at a temperature of 20°C. Conductor sizes shall adhere to the specifications outlined in the contract drawings.
Splices and Connections:
Unless otherwise specified, all splices and connections shall be executed using connection methods supplied by one of the following approved manufacturers, with no substitutions permitted:
- Cadweld process as manufactured by ERICO Products, Inc.
- Burndy “HYGROUNDTM” compression system. Prior to daily usage, the compression tool shall undergo calibration tests. Only Burndy tools for crimps shall be employed.
- Panduit “STRUCTUREDGROUNDTM” Direct Burial Compression Grounding System. The compression tool shall undergo calibration tests before each day’s use. Crimps shall follow the 3-step enhanced process to comply with IEEE Std 837. Only Panduit dies and approved tools shall be used.
Above Ground Connections:
Where making above-ground connections is not feasible using the exothermic welding process (e.g., for aluminum structures, building columns under 6 mm (1/4″) thickness, motors, and equipment with bolted ground pads), connections shall be established utilizing copper compression terminal lugs.
4.10 Terminal Lugs
Testing of Terminations:
Upon installation, all terminations must undergo a self-test involving the application of moderate force to the wire to ensure the integrity of crimped lugs or the correct insertion into box connectors.
Proper Installation of Stranded Wire:
When dealing with stranded wire in lugs or box connectors, the contractor must ensure that all strands are correctly inserted before performing crimping or tightening screws.
Locking Fork Lugs for Smaller Wire Sizes:
For wire sizes #10 AWG and smaller, the use of locking-type insulated fork compression lugs that match the wire size and terminal block screws is mandatory for all wiring terminations on terminal strips equipped with terminal screws. These lugs must be crimped using the manufacturer’s approved ratcheting-type crimping tool.
Wiring at Low Voltage DC:
When dealing with 24 VDC power, control, and instrument signal wiring, the employment of terminal lugs for all terminations of stranded wires is highly recommended.
Special Consideration for Terminals Incompatible with Lugs:
In cases where equipment is equipped with terminal blocks or connectors that are unsuitable for lugs, conductors should terminate directly to the connector without utilizing a cable lug.
External Components and Their Integration:
External components such as resistors, diodes, or MOVs must be equipped with their terminal lugs installed under the same screw as the field wire. Terminal screws may accept a maximum of two lugs. If the terminal is incompatible with a terminal lug, a terminal block with an integral resistor must be used.
Wiring at Low Voltage AC:
For AC power and control wiring up to and including 600 volts, it is advisable to use terminal lugs for all terminations of stranded wires.
Wire Sizes #8 AWG and Smaller:
In instances where wires #8 AWG and smaller are not terminated on terminal strips or under terminal screws (e.g., low horsepower motor terminal boxes or electric heater terminations), the use of copper, compression-type one-hole lugs, such as Burndy YA-L series or equivalent, is necessary. These lugs must be bolted together and subsequently taped.
Wire Sizes #6 AWG and Above:
Contractors are permitted to employ one-hole lugs for wire sizes #6 AWG through #4/0 AWG on copper wire up to and including 600 volts. For wire sizes of 250 kcmil and larger, it is obligatory to use two-hole lugs. All lugs must be electro-tin plated copper long barrel seamless compression lugs, such as Ilsco type CLN series or equivalent. Crimping should be carried out using a compatible hydraulic compression tool from the same manufacturer as the lug. Crimping should initiate from the hole end of the lug towards the cable end. The use of mechanical screwed cable connectors is strictly prohibited. In cases where equipment allows for two-hole drilling, the appropriate two-hole lug should be provided. These lugs must be bolted together and subsequently taped.
Lugs Not Mandatory:
Lugs are not mandatory when equipment is provided without provisions for bolting lugs (e.g., mechanical box connectors of motor control centers or molded case circuit breakers). Connectors must be torqued in accordance with the equipment manufacturers’ recommendations.
Motor Leads:
For all #6 AWG and larger flexible, stranded motor leads provided with motors below 600 volts, the contractor should provide compression connectors.
Evaluation of Lugs with Non-Circular Compression Barrels:
In cases where motor leads are equipped with lugs that do not possess fully circular compression barrels (e.g., open barrel type with folding flaps), the contractor should replace them with compression connectors. If there is uncertainty regarding the suitability of a lug, check with manufacturer.
Ring-Tongue Lugs:
For all terminations in current transformer driven circuits, ring-tongue, insulated, compression-type lugs should be used.
Quick-Disconnect Terminations:
When dealing with pigtailed device terminals subject to quick-disconnect, nylon-insulated terminations are the recommended choice.
4.11 Terminal Blocks
4.12 Hardware
4.12.1 Screws, nuts, bolts, flat washers, and lockwashers provided by contractor for electrical current-carrying connections or grounding connections shall be of a silicone-bronze alloy (or stainless steel) approved for electrical work. Hardware associated with an individual connection shall be either stainless steel or silicone bronze. Suitable flat washers and lockwashers shall be installed on all connections.
4.12.2 Screws, nuts, bolts, flat washers, and lockwashers furnished with manufacturer-furnished equipment (for example, switchgear, motor control centers, substation equipment and structures, or bus duct) for electrical current-carrying connections or grounding connections shall be installed as furnished, without substitution, regardless of the material supplied. Substitution of materials may result in performance issues or void manufacturer’s warranty.
4.12.3 Screws, nuts, bolts, flat washers, and lockwashers used for mounting electrical equipment shall be galvanized. Electroplated galvanizing is acceptable for bolt sizes 6 mm (1/4 in) in diameter and smaller. Suitable flat washers and lockwashers shall be installed on all connections.
4.12.4 Items such as anchor bolts, inserts, and support steel used for mounting electrical equipment on building steel, masonry, or concrete shall be provided by the contractor. The location of these items shall be verified by the contractor. All necessary items such as, brackets, rods, and hangers for supporting electrical equipment and conduit shall be furnished by the contractor. All support steel shall be hot-dipped galvanized or stainless steel. In cooling tower areas, water treatment buildings, and any other area subject to continuous moisture, all required conduit supports shall be aluminum or stainless steel.
4.13 Miscellaneous
4.13.1 All materials and equipment not mentioned in the preceding paragraphs shall be provided according to descriptions on the contract drawings.
4.14 Air Products-Furnished Equipment/Materials (Handling and Installation)
4.14.1 The provisions of Sections 17 (Equipment and Tools) and 18 (Layout of Work and Site Conditions) of 4WCE-600001 and the requirements of 600.002 apply to all Air Products-furnished electrical equipment and materials, including major items that are to be set by others. The contractor’s responsibility shall include, but is not limited to, the following:
4.14.1.1 The contractor shall provide Air Products with written acceptance of all furnished cable reels. This acceptance shall state that before installation the cable reel and visible portions of the cable(s) were visually checked and the cable reel and cable insulation or jacket appeared sound and undamaged. Any visible damage identified shall immediately be brought to the attention of an Air Products field representative. All cable reels shall be handled and stored according to manufacturer’s instructions.
4.14.1.2 Perform dc insulation resistance test on all medium-voltage motors upon receipt to measure polarization index. All motor space heaters shall be continuously energized with temporary power according to the nameplate until the permanent power may be tied in and energized. Subsequent motor dry-out because of noncompliance is the contractor’s responsibility.
4.14.1.3 Dielectric test of an oil sample from each filled transformer on receipt. A positive nitrogen pressure shall be established and maintained on each filled transformer until job completion. Subsequent oil servicing because of noncompliance is the contractor’s responsibility.
4.14.1.4 Provision for heated and dry storage facilities for equipment and materials that might be damaged or degraded by outside storage. The electrical distribution portion of buildings shall not be used for storage of materials and equipment after any of the electrical equipment is energized.
4.14.1.5 Final assembly of equipment as required. This includes, but is not limited to, transformer fins, fans and other accessories, oil for filled transformers and circuit breakers, switchgear, E2 starters, motor control centers, bus duct, battery racks, high-voltage motor connection cubicles, Kirk-interlock hardware, attachment of motor terminal boxes to motor throats, and installation of neutral grounding resistors on transformers when applicable. It also includes the provision of oil-handling equipment (including a pump and a filter press/drier) for oil-filled transformers and circuit breakers as required for assembly.
4.14.1.6 Removal of all drain plugs in the outdoor bus duct to prevent water accumulation and insertion of suitable bug screen.
4.14.1.7 The contractor shall install all RTD/thermocouple elements in the thermowells installed by the mechanical contractor.
5. INSTALLATION PROCEDURES
5.1 Conduit and Cable
5.2 Wiring
5.3 Low Voltage Wiring
5.4 Cable Tray and Cable
5.5 Bus Duct
5.6 Labeling (Wire and Cable)
5.6.1 All control, power wires, and low voltage instrument pairs and triads shall be labeled at each termination point. The numbers and letters shall be typewritten and shall correspond with those shown on the termination schedules and contract drawings. Labels shall be white and printed with a thermal transfer printer. Labels shall be Panduit polyolefin thermal transfer labels, Brady Co. Permasleeve™ marker or equivalent heat shrink, sleeve-type wire markers. Wire sizes 2/0 AWG and above may use Panduit marker plate labels #M300X050Y or equal. The labels to be positioned directly adjacent to the lug or terminal and the description shall be visible without manipulating the wire.
5.6.2 All multiconductor cables and cable bundles shall be labeled at each end. The numbers and letters shall correspond to the cable numbers shown on the cable schedules and contract drawings. Cable markers shall be Panduit marker plate labels per paragraph 5.6.1.
5.6.3 Do not shrink wire markers until requested by the Air Products field representative. Heat shrinking of markers on wires terminating in Programmable Electronic System (PES) cabinets and other sensitive electronic equipment shall be performed before termination of wire on terminal strip to prevent possible damage to electronic equipment caused by overheating.
5.7 Labeling of Electrical Areas and Equipment
5.8 Patching, Replacement, and Modification of Existing Work
5.8.1 After installation of the electrical work is completed, the contractor shall neatly patch and/or repair existing construction that might have been damaged, removed, or altered during the installation. Work shall be similar and equal in quality to the work removed and/or damaged, unless otherwise shown or specified. Such work shall include, but is not limited to, patching and/or replacement of existing masonry, siding, roofing, partitions, and painting to the condition it was in before the installation of the electrical equipment.
5.8.2 All items such as structural steel supports and inserts shall be painted with one coat of metal primer immediately after installation. Building steel painted surfaces that are damaged during the welding of the supports shall be immediately treated with metal primer.
5.8.3 When PVC-coated conduit is used, any coating removed or damaged during construction shall be restored using the appropriate materials.
5.8.4 All penetrations of conduit or cable tray through building walls shall be sealed with a fireproof intumescent foam, RTV or equal as required, to provide a weatherproof seal, or as instructed and shown on contract drawings.
- Working on Incoming Power System (during construction)
7. INSPECTION AND TESTING