Attachment__1_-_Tech_Specifications.pdf

DEPARTMENT OF THE ARMY

UNITED STATES ARMY GARRISON VICENZA – DARBY MILITARY COMMUNITY

PUBLIC WORKS OFFICE

APO AE 09613

Project

AD1 00210-7

TITLE

INSTALL FREQUENCY CONVERTER AT BLDG 701

TECHNICAL SPECIFICATIONS

Consisting of 19 pages

PAOLO SERRAGLINI

Chief, Engineering Services Branch

Prepared by: STEPHEN L. DONNELLY, PE Public Works Manager

On 13 June 2019 APPROVAL DATE ________________

SECTION Ia

GENERAL PROVISIONS

1a-01 WORK PHASING.

a. Work Schedule. Whenever the nature of the contract and the work location are such that the work is to be performed in an area assigned to activities and services that cannot be interrupted, work shall be scheduled with concurrence of COR in such a manner as to cause the least possible inconvenience to the normal operations of mentioned activities and services.

Contractor shall submit his proposed work schedule to the COR at the time of the pre-construction conference. Work start shall be contingent upon schedule approval.

b. Utilities Cut-Offs. As a rule, cut-off of power and other utilities (water, sewage, heating system, etc.) is not allowed. All temporary connections necessary to insure continuous power distribution shall be provided. If cut-offs are necessary, they shall not exceed the period of time strictly needed to make the temporary connections. Cut-off shall be scheduled with the

COR not less than 15 days ahead of time.

c. Alarm, Telephone and Televisions Systems. Deenergizing of alarm, telephone and television systems is strictly prohibited. Should these systems, which may not appear on the drawing interfere with the contract work, they shall be temporarily diverted and fed by means of temporary connections to be adequately protected. Written approval must be obtained from COR prior to doing any temporary work.

d. System Reactivating. At the completion of the work, all existing systems, including water, electrical and heating systems, shall be reactivated and placed in their original locations.

e. Temporary Protections. Floors, carpets, and equipment that cannot be removed shall be adequately protected by temporary tarpaulins to be furnished and installed at no cost to the US Government. In addition, temporary protections shall be furnished and installed in some particular areas so as to allow performance of activities that cannot be interrupted or transferred.

Also, the Contractor shall be responsible for removing, protecting, and reinstalling all furniture, shelves and furnishings that may interfere with the work course. A wrong or no evaluation of all requirements specified above does not constitute grounds for a request for additional compensation.

1a-02 JOBSITE CLEAN UP AND DUST CONTROL. The contractor shall have sufficient trash/waste bins on site, and shall clean the worksite so that all discarded materials, debris and trash are placed in these bins at the end of each workday, and not left or allowed to accumulate anywhere else on the jobsite. These waste bins shall not be allowed to overflow with debris, and shall be emptied as soon as they become full. Haul roads shall be watered sufficiently to prevent excessive dust. The work area shall be swept regularly to prevent accumulation of debris. Equipment, construction materials and excavated soil shall be stored in a safe and orderly manner on the jobsite, in accordance with the contractor's approved area use plan.

1a-03 CONSTRUCTION AND DEMOLITION WASTE MANAGEMENT. The contractor is considered the waste generator of all salvage, re-usable, re-cyclable and disposable materials derived from the demolition and removal works included in this contract and shall handle these materials as hereinafter indicated.

a. Salvage Material. All salvage end items that the COR will have considered in good operating conditions shall be disassembled without damage, cleared of all dirt and scaling and then transported to the DPW Warehouse, Building 5156, Depot, where they shall be handled over undamaged.

b. Re-usable Material. End items removed during contract accomplishment which cannot be re-utilized in future construction but which still have a commercial value shall be delivered to the DRMO, through DD Form 1348-1a. This material includes, but it is not limited to, canvas, textile consisting of scrap clothing, scrap aluminum including doors, windows and frames, copper, brass, bronze, and stainless steel, cables, electric motors, light and heavy metals in different sizes and thicknesses that the DRMO contractor can handle (3-4 m long), electrical and electronic equipment, and kitchen appliances. All the above material must be free of hazardous property and need to be segregated. The scraps generated in the Supply &

Maintenance Area shall be transported to the DRMO yard only on Monday and Tuesday from

08:00 am to 15:00 pm by appointment through the COR. The scraps generated from other installations must be kept in place. DRMO will arrange the removal. However, the contractor shall request a pre-inspection of the material by DRMO through the COR.

c. Recyclable Material. All construction and demolition recyclable waste material shall be delivered to authorized treatment facilities by the contractor.

d. Special Waste. All special waste, either hazardous or not hazardous, shall be delivered by the contractor to authorized disposal facilities.

e. Waste Storage. Construction and demolition waste shall be stored in waste specific containers provided by the contractor. Containers will be in good conditions, free from severe rusting, bulging, or structural defects. Containers shall be placed in area identified by

COR. Containers shall be removed once full or on COR’s decision.

f. Certificates and Authorizations.

(1) Recyclable Materials. As regards to recyclable materials, the Contractor shall submit copy of the authorization of the treatment facility which they are delivered to and will certify that waste have been removed in compliance with applicable law requirements.

(2) Disposable Materials. As regards to material delivery to disposal facilities, the contractor will provide the COR and DPW Environmental Office with copies of the following documents:

Authorization to transport construction and demolition waste;

Authorization of the landfill;

4th copy of Formulario di Identificazione del Rifiuto.

(3) Waste Manifest. All transported waste will be accompanied by the

Formulario di Identificazione del Rifiuto (waste manifest) to ensure a complete audit trail from point of origin to ultimate disposal. The waste manifest must be completed in quadruplet, all dated and signed by the waste generator and countersigned by the transporter. The first copy of the manifest will remain with the waste generator; of the remaining three copies, (countersigned and dated by the receiver), the second copy will remain with the transporter, the third copy will remain with the receiver, and the fourth copy must be returned by the transporter to the waste generator within 3 months of delivery of the waste to the disposal/treatment facility.

g. Costs. All operations included in this paragraph shall be carried out by the contractor with no additional cost to the US Government.

1a-04 AUTHORIZATION FOR INSTALLATION OF MATERIAL AND EQUIPMENT.

Before installing any material or equipment mentioned in the specifications, approval shall be obtained from the COR. Contractor shall submit material samples, shop drawings, manufacturer's literature, etc., to the COR 10 days prior to installation and shall proceed with installation only after receiving written approval from the COR. All material installed without

COR's approval shall be removed.

1a-05 ISPESL AND CEI STANDARDS. All work described in these specifications shall be accomplished in strict compliance with the ISPESL (Superior Institute of Prevention and

Assurance of Work) and CEI (Italian Electrotechnical Committee) standards. In particular, if the work under contract, such as roof repairs, building painting, etc., may cause Contractor's personnel or other individuals to come in contact with non insulated electric lines, these shall be temporarily protected by use of appropriate spiral plastic tubes available on the market.

1a-06 TRANSLATION AND TITLE ABBREVIATION. The terms COR and "Direzione dei Lavori" used in the Italian version of these specifications are equivalent to the American term

"Contracting Officer's Representative," which in the English version is indicated by the letters

COR.

1a-07 DIGGING PERMIT. The Contractor shall obtain a digging permit for all work areas affected by this contract (to insure that all the as-built information for underground services is received). This permit and related drawings must be received by the Contractor prior to starting any work. After receipt of the digging permit, the Contractor shall immediately notify, in writing the Contracting Officer of the permit receipt. The Contractor will be held responsible for any damages caused to existing services, as indicated on the digging permit and related drawings, and will repair such damages at his own expense.

1a-08 ASBESTOS. No handling of asbestos containing material is included in this project. Use of asbestos containing materials is forbidden.

1a-09 PARTICULAR REQUIREMENT FOR WORK IN HEATING PLANTS. When the contract requires the work to be performed inside heating plants, the contractor shall provide a new cylinder in the door lock and shall deliver two keys of the new cylinder and the removed cylinder to the personnel in charge of the maintenance. At the work end the contractor shall restore the lock to the original conditions and the temporary cylinder will remain his own property.

1a-10 ANTI-TERRORISM TRAINING. The Contractor shall comply with the following security requirements:

a. AT Level I Training. All contractor employees, to include subcontractor employees, requiring access Army installations, facilities and controlled access areas shall complete AT

Level I awareness training within 30 calendar days after contract start date. The contractor shall submit certificates of completion for each affected contractor employee and subcontractor employee, to the COR within 10 calendar days after completion of training by all employees and subcontractor personnel. AT Level I awareness training is available at the following website: httQ://jko.jten.mil.

b. OPSEC Training. According to AR 530-1, new contractor employees must complete Level I

OPSEC training within 30 calendar days after they report for duty. All contractor employees must complete annual OPSEC awareness training.

The contractor will develop an OPSEC standing operating procedure (SOP)/plan within 90 calendar days after the contract is awarded, to be reviewed and approved by the responsible

Government OPSEC officer, according to AR 530-1. This SOP/plan will include the

Government’s critical information, why it needs to be protected, where it is located, who is responsible for it, and how to protect it. The contractor will ensure this individual becomes

OPSEC Level II certified according to AR 530-1.

c. Access and general protection/security policy and procedures. Contractor and all associated sub-contractors employees shall provide all information required for background checks to meet installation access requirements to be accomplished by installation Provost Marshal

Office, Director of Emergency Services or Security Office. Contractor workforce must comply with all personal identity verification requirements (FAR clause 52.204-9, Personal Identity

Verification of Contractor Personnel) as directed by DOD, HQDA and/or local policy. In addition to the changes otherwise authorized by the changes clause of this contract, should the

Force Protection Condition (FPCON) at any individual facility or installation change, the

Government may require changes in contractor security matters or processes.

d. iWATCH Training. The contractor and all associated sub-contractors shall brief all employees on the local iWATCH program (training standards provided by the requiring activity

ATO).This local developed training will be used to inform employees of the types of behavior to watch for and instruct employees to report suspicious activity to the COR. This training shall be completed within 30 calendar days of contract award and within 30 calendar days of new employees commencing performance with the results reported to the COR NLT 40 calendar days after contract award.

1a-11 ENVIRONMENTAL PROTECTION SYSTEM. The contractor will provide the following information semi-annually to be used by the Government to address environmental performance relative to the goals of the USAG Vicenza Environmental Management System.

Please note that the amounts reported are those used/generated by the contractor regardless of source (private purchase or government furnished). Reports for January – June will be submitted by 15 July and reports for July-December will be submitted by 15 January each year.

Media Report Element #1 Report Element #2

Non-Hazardous Solid

Waste

Total Waste

Generated (Kg)

Amount of Waste

Diverted from

Landfill (Kg)

Construction

Debris/Demolition

Materials

Total Waste

Generated (Kg)

Amount of Waste

Diverted from

Landfill (Kg)

Compostable/Organic

Material

Total Waste

Generated (Kg)

Amount of Waste

Diverted from

Landfill (Kg)

Hazardous Materials Total Used (Kg)

Hazardous Waste Total Generated (Kg) Total Recycled (Kg)

Energy Consumption -

Electricity

Total Energy

Consumed (MBtu)

Energy Consumption -

Fuel

Total Fuel Consumed

(L)

Renewable/Alternative

Energy

Total Consumed

(MW)

Facility

Construction/Renovation

Number of Buildings

LEED Certified

Silver or Higher

SqFt of buildings

LEED Certified

SECTION IIa

DESCRIPTION OF WORK

2a-01 STATEMENT OF WORK. Contractor shall furnish all plants, labor, equipment, material and transportation necessary for the accomplishment of the work described in these specifications and shown on drawings CS and E1, both of which are an integral and binding part of the contract.

2a-02 DESCRIPTION OF THE WORK. The work to be performed in this project consists of the installation of a 60Hz electrical system to power American equipment in bldg. 701 (Air

Force Vehicle Workshop).

The works included are (but not limited to):

- Installation of a new switch in the 230V three-phase MDP panel.

- Installation of a new frequency converter, 230V 3P+N+G 50Hz input, 208V 3P+N+G

60Hz output, 12kVA power.

- Installation of new American standard sockets complete with differential magnetothermal switch.

- Installation of new power circuits.

- Installation of new conduits and metal boxes to route the new circuits.

2a-03 SAFETY DURING CONSTRUCTION.

The project is performed assuming the presence of only one firm on the work place;

therefore paragraphs 3 and 4 of art. 90 of the Legislative Decree 81/2008 are not deemed applicable. However, the contractor shall take all safety measures necessary to prevent accidents on the work site as set forth by any other applicable part of the same Law. The

Contractor shall also provide the COR with a “Piano Operativo di Sicurezza” (operational safety plan). In case a second firm becomes present, the fact shall be notified immediately to the Contracting Officer.

2a-04 EMERGENCY SITUATIONS. Contractor will maintain the following documentation available and usable at the work site, to be provided by the COR:

- A copy of the Camp Darby Emergency Plan, to which contractor will refer in case of the emergency conditions indicated in the plan itself.

- Base Grid Coordinates layout, with the work site highlighted.

- List of emergency telephone numbers.

2a-05 PROJECT IDENTIFICATION SIGN. The contractor shall supply and install a sign identifying the project. The sign shall be of high-resistant plywood for outdoor installation, white painted. The dimensions shall be 1200x2400x12 mm. The letters of the wording shall be uppercase, black color, 5 cm high, except the letters of the project title which shall be 10 cm.

The sign shall be fixed to a structure made of any lasting material in compliance with all safety requirements. The sign shall be well visible, with the lower side at 1.2 m from ground level.

SECTION XIIIa

ELECTRICAL SYSTEMS

13a.1 GENERAL DIRECTIVES AND REFERENCE NORMS

13a-1.1 Reference norms

The publications listed below are an integrative part of these specifications as applicable and in the version governing at the contract award.

Italian publications

- All applicable norms of the Comitato Elettrotecnico Italiano (CEI).

European publications

- All applicable norms of the European Committee for Electrotechnical Standardization

(CENELEC).

USA publications (civil and military ones)

- NFPA 70 National Electric Code

- NFPA 780 Installation of Lightning Protection System

- NFPA 101 Life Safety Code

- UFC 3-520-01 Unified Facilities Criteria – Interior Electrical Systems

- UFC 3-530-01 Unified Facilities Criteria – Interior and Exterior Lighting and Controls

- UFC 3-550-01 Unified Facilities Criteria – Exterior Electrical Power Distribution

- UFC 3-570-03N Unified Facilities Criteria – Power Distribution Systems

- UFC 3-570-02N Unified Facilities Criteria – Electrical Engineering Cathodic Protection

- UFC 1-200-02 Unified Facilities Criteria – High performance and sustainable building requirement

- UFC 4-010-01 Unified Facilities Criteria – DoD Minimum Antiterrorism Standards for

Buildings

- UFC 4-022-01 Unified Facilities Criteria – Security Engineering: Entry Control

Facilities/Access Control Points

International publications

- All applicable norms of the International Electrotechnical Commission (IEC).

In case of conflict between the norms listed above, the more stringent norms as to safety shall apply.

13a-1.2 Requirements of the firm installing the systems

The firm in charge of the installation shall have all the qualifications required by Decree n. 37 of 22 January 2008 “Regolamento concernente l’attuazione dell’articolo 11-quaterdecies, para.

13, a) della legge n. 248 del 2 dicembre 2005, recante riordino delle disposizioni in materia di attivita’ di installatione degli impianti all’interno degli edifici” (regulations on implementation of article 11-quaterdecies, para. 13 a) of law n. 248 of 2 December 2005 for the modification of the requirements on the installation of systems inside buildings):

- The firm shall be inserted in the roll of firms as per Decree of the President of the

Republic 7 December 1995, n. 581 and subsequent modifications, or in the Provincial Roll of handicraft firms as per law 8 August 1985, n. 443.

- The firm shall have all certifications acknowledging the technical-professional requirements, as per the models approved by Decree of the Minister of Industry, Trade and

Handicraft of 11 June 1992. In particular the firm shall have the authorization to work on systems as per letter “a” of article 1 of DM 37/08.

The installing firm shall provide the COR with all certifications mentioned above, attesting the suitability to the performance of the work.

13a-1.3 Statement of compliance

At the completion of the work and after the checks required by the governing norms, including the ones on the system operation, the firm in charge of the installation shall provide the COR with 2 copies on paper of the statement of compliance pertaining to the system installed as per the norms of article 6 of Decree n. 37 of 22 January 2008. The report containing the types of materials to be used, as well as the project as per article 5 of Decree n. 37, are part of the report, which has to be prepared as shown on enclosure I of the decree, as modified by DM 19 May

10 “Modifica degli allegati al decreto 22 gennaio 2008, n. 37, concernente il regolamento in materia di attivita’ di installazione degli impianti all’interno di edifici (modification to the enclosures of decree 22 January 2008, n. 37, on the regulation of installation of systems inside buildings). Statements of compliance on different forms and/or lacking the pertaining documentation to be enclosed will not be accepted. In addition, the installing firm shall provide the COR with a .pdf file deriving from scanning the original statement, stamped and signed, with the enclosures.

13a-1.4 Materials to be installed

All electrical materials and equipments to be installed shall be in compliance and installed as indicated by the manufacturers or by the installing firms, and as indicated at paragraph 1.1, complete with CE brand. In no case the material, the equipment or the method of installation shall be inferior to the standards established by the latest edition of the applicable norms. The equipment defective or damaged during the installation or the final tests shall be replaced or repaired as approved by the COR. The contract drawings show the extension and general location of the system. If variations with respect to the contract drawings or to the specifications are deemed necessary by the contractor to make the system in compliance with the norms mentioned above, these variations and their reason for shall be submitted to the COR for their technical approval as soon as possible. No variation shall be performed without the preventive written approval by the Contracting Officer.

Unless otherwise indicated in writing by the COR, the materials to be furnished under these specifications shall be unused, first grade commercial quality standard products of a reputable manufacturer regularly engaged in the production of such equipment and shall be the manufacturer's latest standard design that complies with the specification requirements. Where two or more units of the same class of equipment are required, these units shall be the products of a single manufacturer; however, all component parts of the equipment need not be the products of a same manufacturer.

13a-1.5 Submission of materials for approval

With reference to paragraph 1a-04, the Contractor shall submit a complete list, in triplicate, of the materials, fixtures and equipment to be utilized in the work, to the COR’s approval. The list shall include the country of origin, name of manufacturer, catalog numbers, pictures, diagrams, drawings, and any other necessary description of technical data. In case the factory literature does not describe the material in sufficient detail to ensure conformance with the specifications, samples of the materials shall be submitted for approval. In the case of special made-to-order equipment, or shop fabricated items standard components, shop drawings showing fabrication details, material specifications, finishing, installation methods, etc. shall be submitted in triplicate. No consideration will be given to partial lists submitted from time to time. Any listed material, fixtures, and equipment that are not of first grade commercial quality or not in accordance with the specifications requirements shall be subject to rejection. Descriptive literature and shop drawings covering approved material and equipment will remain in the possession of the US Government and material or equipment samples will be retained until the required quantities of approved material or equipment have been delivered to the building site or until determined by the COR.

13a-1.6 Equipment installation

The contractor shall perform all operations of uncrating, assembly, setting in place, levelling, anchoring, testing and adjusting for perfect operation of all machinery and equipment items, except for items to be installed by the US Government agencies. The locations shown on the drawings may be subject to minor deviations to avoid interference with utility lines or architectural features of the building. Measurements for mounting bolts, platforms or recesses will not be taken from the drawings but will be confirmed from approved equipment manufacturer's shop drawings or directly from the machinery or equipment. The electric circuits and services for other utilities will be installed as indicated on the drawings. The exact location of machinery connection boxes, conduit pipe or tubing risers will be confirmed on the field, prior to installation to provide the most convenient accessibility to the connection on the machines. If the manufacturer does not provide machines with connection boxes, the Contractor shall supply and install the proper boxes to ensure satisfactory enclosed connections.

13a.2 REMOVAL

Included in the electrical removal are all circuits with relative surface mounted or recessed raceways, and all equipment connected to them, such as electrical panels, light fixtures, switches, receptacles, junction boxes, etc., complete with ancillary fastenings, and any other material not necessary in the new system. Partial removal of the electrical system shall be carried out so that electrical circuits in the rooms adjacent to the areas where work is performed remain operational. All existing masonry work or utility lines damaged during the removal shall be adequately restored to match the original conditions.

13a.3 GROUNDING SYSTEM

13a-3.1 General

The grounding system shall be installed in compliance with norms CEI EN 50522, CEI 64-8 and with handbook CEI 64-12. When the grounding system is used as a lightning protection system, also standard CEI EN 62305 and NFPA 780 shall be complied with.

13a-3.2 Cases in which grounding is forbidden

Grounding is forbidden in the following cases (unless otherwise indicated):

- Class II equipment (provided with double insulation);

- Equipment fed by isolation transformers (protected for electrical isolation); in case the isolating circuit feeds more than one user, masses shall be interconnected through a unipotential conductor insulated from grounding.

- Equipment fed by safety transformer (SELV protection).

13a-3.3 Ground systems components

The ground system shall consist of the following parts:

- Ground rods;

- Main ground bus for connection of the grounding and protecting conductors;

- Ground conductors for the interconnection of the following elements:

o ground rods among themselves o ground rods to the main ground bus o foundation reinforcements to the main ground bus ;

- Protective conductors for connection of all equipment steel castings to main ground bus

(PE);

- Conductors for main equipotential connections (EQP) connections, connecting to the main ground bus.

o Pipes entering the building, mainly for water and fuel oil supply o Pipes for the main heating and air conditioning systems;

o Any metal structure of the building

- Conductors for supplemental equipotential connections, required for the following spaces:

o Bathrooms and shower rooms o Swimming pools o Medical or beauty rooms.

The supplemental equipotential connections connect all extraneous masses present in the room to the supplemental equipotential node, namely the pipes entering the room and the metal parts, such as doors and windows providing a resistance to grounding below the following values:

o 1000 ohm in bathrooms, shower rooms and swimming pools o 200 ohm in medical rooms of group 1.

The contractor shall perform the measuring of the resistance to ground of the external masses.

13a-3.4 Connections

Connections between grounds system parts shall be sufficiently sturdy to withstand possible mechanical stresses and at the same time, not to damage the system parts. Unless otherwise indicated on the drawings, connections shall be as follows:

- Connections among ground conductors and between ground rods and ground conductors shall be performed through exothermic welding type CADWELD when directly buried.

- Connections between ground rods and ground conductors shall be performed using clamps and bolts when inside grounding pits. Clamps shall be of copper and adequate for round ground rods. Ground conductors shall be connected to clamps through copper ring lugs; connecting bolts (screws+nuts+washers) shall be of stainless steel AISI 316.

- Connections between accessible ground conductors shall be obtained through an exothermic welding type CADWELD or through “C” shaped sturdy clamps of the compression type, of electrolytic copper (to provide a contact equivalent to the one of the welding); in this case connections shall be protected by a special compound to prevent oxidation when performed outdoor.

- Connections of ground conductors to foundation reinforcements shall be performed through exothermic welding type CADWELD.

- Connections between ground conductors and main ground bus or between protecting conductors and main ground bus shall be performed using ring lugs of nickel coated brass, of the clamp type, connected to the bus by screws, bolts and washers of nickel coated brass.

- Connections between conductors and metal masses shall be performed using the most adequate accessories depending on the metal mass to be connected and to prevent corrosion: for metal pipe grounding, collars or straps complete with clamp for fixing the equipotential conductor shall be used.

- Connections between equipotential conductors and main of secondary ground bus shall be performed using eye strap collars of nickel coated brass of the clamp type, connected to the bus through screws, nuts, washers of nickel coated brass.

Connections of main equipotential conductors to pipes entering the building shall be performed at the entrance of pipes into the building.

Connections of secondary equipotential conductors to pipes entering the building shall be performed at the entrance of pipes into the room.

The contractor is required to visually verify equipotential connections at the presence of the COR before closing chases.

13a-3.5 Ground rods

Ground rods shall be of the sectional type with circular solid cross section, made of steel with a 0.5 mm thick copper plate covering, 20 mm external diameter, 3 meter minimum length. The ground rod shall be complete with joint sleeves, extension sections, miscellaneous type wire terminals (depending upon the project installation requirements), drive head, and bottom cone.

The method of driving indicated by the manufacturer shall be complied with to avoid any damage to the rod. The various rod sections shall be driven as perpendicular to the ground as possible. The ground rod top shall be driven below the ground level to avoid corrosive effects whenever possible. In any case the part of rod in direct contact with the ground shall not be less than 2.8 m. Ground rods shall be housed inside accessible ground pits, unless otherwise indicated on the drawings or in the description of the work.

13a-3.6 Inspectable Ground Pits

Ground pits shall be sectional type, pre-cast concrete. The bottom of the ground pits shall be provided with a hole for ground rod and conductor penetrations. The internal minimum dimensions shall be: 50 (length)x 50 cm (width)x 50 cm (height), 5 cm thick. Installed ground pits shall be equipped with frame and cover of class D400 cast iron, that shall result flush with the adjacent surfaces. The ground surrounding the station shall be compacted and a concrete pouring shall be performed around it to increase stability. A dedicated sign shall be permanently fixed with expansion anchors and screws of stainless steel AISI 316 on the closest wall. The distances from the sign to the pit shall be reported on the sign by engraving.

13a-3.7 Main ground bus shall consist of a flat bar of bare copper complete with installation spacers. Unless otherwise indicated on the drawing or in the scope of work, the main panel ground bar will work as main grounding bus. All conductors connected to the main bus shall be identified with labels fixed permanently and indicating the components connected.

13a-3.8 Secondary grounding bus shall consist of a bare copper bar, holed and complete with fixing spacers, in an inspectable box.

Secondary grounding conductors shall be connected to the main bus through a protecting conductor of the flexible and insulated type having 6 sq mm minimum cross section. All conductors connected to the secondary bus shall be identified with tags fixed permanently, indicating the components connected.

13a-3.9 Ground conductors.

Ground conductors shall be of bare copper strand, 35 sq mm minimum cross sectional areas and minimum diameter of each single wire 1.8 mm, installed at minimum 75 cm depth below ground level. Service entrance sections to the building shall be protected by conduit and shall be removable.

13a-3.10 Protective conductor (PE) shall be of copper, flexible, insulated, yellow-green, minimum cross sectional areas as indicated below:

CROSS SECTIONAL AREA OF PHASE

CONDUCTOR

CROSS SECTIONAL AREA OF

PROTECTIVE CONDUCTOR

Up to 16 sq mm same as phase conductor

Between 16 and 35 sq mm 16 sq mm

Over 35 sq mm One half of the phase conductor

NOTE: When the protective conductor is not included in the conduit of the phase conductor, the protective conductor shall be no less than:

2.5 sq mm, when a mechanical protection is required;

4 sq mm, when a mechanical protection is not required.

13a-3.11 Conductors for equipotential bonding shall be of insulated flexible copper strand, yellow-green color. The minimum cross sectional areas of these conductors shall be as indicated below:

EQUIPOTENTIAL

CONDUCTORS

MAIN PROTECTING CONDUCTOR CROSS

SECTIONAL AREA PE

CONDUCTOR

EQUIPOTENTIAL

CROSS SECTION

Main EQP

≤ 10 sq mm 6 sq mm

= 16 sq mm 10 sq mm

= 25 sq mm 16 sq mm

≥ 35 sq mm 25 sq mm

Additional EQS:

mass-mass connection

EQS ≥ PE with the smallest cross sectional area;

When two masses belong to circuits having the cross sectional areas of protecting conductors very different, fault currents could occur such as to strain thermically and excessively the EQS conductor (of dimensions suitable to the cross sectional area of the minor protection conductor). In this case it is advisable to increase the cross section of the EQS conductor based on the actual fault current.

Additional EQS:

mass-foreign mass connection

EQS = 1/2 of the section of the corresponding conductor PE

Note In any case the cross section of the EQS conductor shall be as follows:

≥ 2.5 sq mm if mechanically protected

≥ 4 sq mm if not mechanically protected

In medical rooms a minimum 6 sq mm cross section is always required.

Mass Conductive part of the electrical system. Under normal insulating condition, this part is not energized; however, in case of failure of main insulation, it may become energized and may be touched (e.g. water heater, domestic appliances, etc.)

Foreign mass Conductive part, unrelated to the electrical system, with a good electrical connetion to the ground, adequate to feed the ground potential (buried water pipe, reinforcement of concrete, metal bearing structures of buildings, etc.)

or other potential.

13a.4 RACEWAYS FOR INDOOR INSTALLATION AND ELECTRICAL CABLES

13a-4.1 General requirements

Maximum cross sectional area utilized in raceways and installation of cables.

In raceways the area taken by the power cables shall not exceed 50% of the usable section.

The interior diameter of pipes shall be at least equal to 1.3 times the diameter of the circle circumscribed of the beam of cables contained therein.

Electrical circuits shall be laid in conduits only when the raceway system is completely installed, so that the electrical system may be pulled out without damage to conduits or wiring.

Raceway course

Raceways shall be installed parallel to walls, to structural elements and to the intersection lines between vertical surfaces and ceilings. Parallel paths shall be spaced symmetrically and the same distance shall be kept at bends, also increasing the radius of each concentric bend. Minor deviations will be allowed in the raceway course shown on the drawing only if strictly necessary. In any case the access to the raceways and junction boxes shall be ensured. All deviations shall be previously notified and approved by the COR

Installation of raceways Contractor shall furnish all necessary hangers, brackets and other incidental items to install raceways in a permanent and suitable manner on the type of surface, consistent with the architectural finish of the location. As a rule, when a conduit is parallel to or crosses mechanical system pipings, it shall be installed above the mechanical piping at an adequate safe distance.

All necessary precautions shall be taken to avoid lodgment of cement mortar, plaster, dirt or other foreign matters in conduits during the construction. Conduits that have become clogged shall be freed of accumulation or replaced.

Masonry crossings

When penetrations are made through walls or ceilings, holes shall be neatly made. After conduit installation, holes shall be adequately restored to match adjacent surfaces. Any roof crossed by conduit shall receive a new adequate waterproofing membrane. PVC or galvanized iron conduits passing through foundations or concrete members shall be laid inside a sleeve installed to provide access for future installation of conduit. The internal diameter of sleeve shall not be greater than 1-1/2 times the external diameter of conduit to be installed. Whenever raceways cross walls or deck ceilings being part of a fire rated insulating system, adequate fire-break barriers shall be provided to restore the original resistance to fire.

13a-4.2 Galvanized steel pipes

Galvanized steel pipes shall have the following characteristics:

- Material: hot-galvanized steel type sendzimir

- Circular cross sectional area

- Minimum exterior diameter 20 mm

- Minimum thickness 1 mm.

Pipelines shall be surface mounted by galvanized steel hangers with lateral hook type opening and threaded hole or with metal brackets. Pipe hangers shall be spaced approximately 1 m o.c.

Use of multiple pipe hangers is allowed. Contractor shall furnish all connectors, elbows, joint sleeves, closing sleeves, covers, reductions and any other incidental items necessary for an IP67 protection degree. When cable conduits are to be connected to other equipment provided with threadless entries, electrical continuity between the two metal bodies will be insured by use of bushings and nuts suitable for the purpose. Use of Teflon or hemp in metal pipe connections is strictly prohibited.

13a-4.3 Flexible fittings for steel pipes

Flexible fittings for steel pipes shall have the following characteristics:

- Material: Steel sheath covered by vacuum PVC

- Circular cross sectional area

- Minimum exterior diameter 20 mm

- Complete with nickel coated brass fittings at the ends

- IP65 protection degree.

Flexible fittings shall be used where a wiring with steel pipes is required to make bends (where the use of rigid bends is not possible) or to make misalignments between pipes, misalignments close to a junction box or to get over obstacles.

13a-4.4 Metal/plastic cable guides

Cable guides shall have the following characteristics:

- Material: of hot-galvanized flexible steel, PVC coated

- Circular cross sectional area

- Minimum exterior diameter 20 mm

- Classification CEI EN 50086:

o Resistance to crushing: class 3 (above 750 N) o Cold impact: class 3 (2 kg from 10 cm) o Resistance to minimum temperature: class 3 (-15°C) o Resistance to maximum temperature: class 1 (+60°C)

- Not fire diffusing as per CEI EN 50086

- Very good resistance to UV rays

- IP65 protection degree through adequate compatible fittings.

Cable guides shall be used with a wiring system of steel pipes for the protection of terminal circuits for the connection to electrical equipment subject to vibrations (i.e. motors, burners, etc.).

13a-4.5 Junction boxes of metallic material

Metallic insulating junction boxes shall be used with the wiring system inside steel and shall have the following characteristics:

- In compliance with norm CEI 23-48, EN 60670

- Rectangular or square shape

- Body and cover of aluminum alloy

- IP66 protection degree

- Minimum resistance to shock: IK 08

- Steel screws

- With smooth sides with cable glands or metal fittings.

13a-4.6 Low voltage electrical cables

Unless otherwise indicated on the drawing or in the description of the work, in rooms not classified at higher hazard in case of fire (not MARCI), electrical cables shall be of the following types:

- FG16OR16 for distribution or terminal circuits

- FS17 for terminal circuits

Conductors shall have the color of the insulation in compliance with CEI norms. In any case the protecting conductor PE shall be yellow-green.

Branching off shall be performed only inside junction boxes through adequate insulating clamps. Conductors of circuits working with voltage higher or equal to 50V shall be installed inside raceways so as to be separated from the ones working at a voltage lower than 50V a.c.

13a.5 N/A

13a.6 ELECTRIC EQUIPMENT

13a-6.1 General

Unless otherwise indicated on the drawings or in the description of the work, the wiring in rooms stated at the present paragraph shall be inside an exposed steel pipe having IP55 minimum protection degree.

13a-6.2 Boxes for power outlets, civil series

They shall have the following characteristics:

- In compliance with the requirements of norms CEI EN 60669-1, CEI 23-5.

- Housing of insulating material

- For installation on the wall

- IP55 protection degree

- Double insulation

- Complete with switches, outlets or other equipment civil series as indicated on the drawings or in the description of the work.

- Current capacity, voltage and number of poles as indicated on the drawings or in the description of the work.

13a-6.3 General characteristics of power outlets

The electrical equipment shall be white and of the modular type, shall meet the requirements of standards CEI 23-68, 23-75, 23-50. The exact location of the equipment shall be agreed upon with the COR. Provide each outlet with a permanent label indicating the voltage and the frequency. All components (outlets, circuit breakers, pushbuttons, supports, plates, etc.) shall be of one brand and of one model. Reference components are MATIX by BTICINO or PLANA by VIMAR or another brand and/or approved model of upper quality.

13a-6.4 127V USA standard outlets

USA outlets shall be 2P+G, 16A, 127/250V a.c., irreversible, USA standard, white color, shielded sockets (as art. AM5115T by BTICINO or approved equivalent).

13a-6.5 Automatic ground fault circuit breaker

Ground fault circuit breaker shall be 2P, 16A, breaking capacity 3000V at 230V with alternate current, 10mA differential current, white color (as art. AM5256S by BTICINO or approved equivalent).

13a.7 N/A

13a.8 DISTRIBUTION PANELS, COMPONENTS, MEASURING SYSTEMS, EMERGENCY VOLTAGE RELEASE

13a-8.1 Modular circuit breakers

Unless otherwise indicated on the drawings or in the description of the work, the breaking capacity of the circuit breakers shall be in accordance with norm CEI EN 60947-2.

Whenever circuit breakers with ground fault relays are required, they shall be class “A” in circuits feeding ordinary loads; ground fault relays in circuits feeding three-phase inverters shall be class “B”.

13a.9 N/A

13a.10 CIVIL WORKS RELATED TO THE INSTALLATION OF ELECTRICAL

SYSTEMS

Civil works related to the installation of electrical systems (where applicable) are as follows even though not specifically indicated on the drawings or in the description of the work:

- Opening of trenches in the walls

- Closing of trenches in the walls

- Plastering of the masonry after closing trenches

- Painting of the masonry after closing trenches with a color equal to the remaining wall

- Replacement of the removed tiles for trenches, with tiles equal or similar to the existing ones

- Restoration of the masonry, of plastering and painting after the crossing through masonry surfaces by raceways

- Restoration of the waterproofing after crossing through the roof by raceways

- Restoration of the fire-break compartmentalization after crossing with raceways.

Any damage to buildings, pipes, equipment caused directly or indirectly by the contractor shall be repaired by personnel qualified in the type of work without additional costs to the US

Government.

13a.11 N/A

13a.12 FREQUENCY CONVERTER

It shall have the following characteristics:

- Input: 230Vac ± 10% 3F + N + T 50Hz

- Output: 208Vca 3F + N + T 60Hz ± 1%

- Nominal power: 12kVA

- Output isolated from the input with the center of the Transformer grounded

- Built in 600x800x1800mm switchgear, with microprocessor controlled digital inverter, input reactance and PWM filter

- Complete with servo-assisted ventilation

- Complete with magnetothermal breaker + GFI on the 208V 60Hz output side:

o 4 poles, 32A, curve C, Breaking capacity 10kA o Ground fault Interrupter 40A Id = 300mA selective, class A

- Cable entry and exit from the top