EMBASSY OF THE UNITED STATES OF AMERICA

U.S. Department of State

The General Services Office (GSO) Bogotá, Colombia

The General Services Office (GSO) at the U.S. Embassy in Bogotá, Colombia has a requirement for CMR ELECTRIC ROOM SAFETY UPGRADE we invite you to read carefully the following minimum requirements:

Conditions of proposal and evaluation criteria.

To be considered for evaluation and award you must include/comply with the following:

• Prices should be in Colombian Pesos (COP). Only for Colombian Vendors.

• Unit price, tax percentage, tax amount ant total amount should be stipulated in the quote.

• Submit with the quotation the technical information sheet per model/reference. (For commodities)

• Your offer must show evidence that it meets or exceeds ALL requirements specified in this advertisement.

• When arquitectural, engineering or construction services are required the company or individual must have an insurance policy for general liability (Responsabilidad civil professional)

• Your offer must meet the technical description provided.

• Offer must be valid for six (6) months.

• Your offer must include CONTRACTOR’S CERTIFICATION ON COMPLIANCE WITH

NATIONAL DEFENSE AUTHORIZATION ACT (NDAA)-.

• Provide evidence on your past experience with this type of requirements.

• Provide evidence that your company has the financial resources or the ability to obtain them to fulfill this requirement.

• Provide Warranty terms.

• Include a statement certifying that the terms of this requirement are clearly understood:

A. REQUIREMENT: Thay your company completely understands the requirement.

B. DELIVERY TERMS: DDP DELIVERY AT THE EMBASSY WAREHOUSE IN BOGOTA.

C. PAYMENT TERMS: 30 Day net payment.

D. VALIDITY OF OFFER: 6 Months

NOTE: We will contact your company clarify or to request additional information during the evaluation process, if necessary.

Site visit

A site visit and explanation of the scope of work is scheduled onApril 29, 2026 at 09:00 hours.

If you are interested in attending, please send an e-mail to BogotaGSOcompras@state.gov using PR15922520 in the subject line, before April 24, 2026 at 12:00 (noon) including the name of your representative (Maximum 2 people), and ID number.

Questions Please use PR15922520 the subject line.

mailto:BogotaGSOcompras@state.gov

Should you have any question regarding this request please send an e-mail to bogotagsocompras@state.gov before May 1, 2026 at 4:00 PM (Bogota, Colombia - local time).

Delivery Terms for U.S. vendors

U.S. vendors: you can send a proposal in USD, but all prices must be DDP at our warehouse in Bogotá - Colombia.

The U.S. Embassy Bogotá will NOT emit a tax exemption certification for Colombian taxes

IMPORTANT NOTE in spite the US embassy is exempt of some Colombian taxes, the Colombian Government courier limits are: $2,000 USD and/or 50 kilos MAX, any package exceeding those limits will no longer be considered courier shipments, and Customs Brokerage + Release of air waybills or Bill of Ladings + Storage fees will be charged, these fees MUST be included in the prospective vendor’s offer as the US Embassy will not cover such expenses.

DELIVERY TERMS: DDP DELIVERY AT THE EMBASSY WAREHOUSE IN BOGOTA. “Delivered Duty Paid” the seller delivers the goods when the goods are placed at the disposal of the buyer, cleared for import on the arriving means of transport, and ready for unloading at the named place of delivery. The seller bears all the costs and risks involved in bringing the goods to the place of destination, has an obligation to clear the goods not only for export but also for import, to pay any duty for both export and import, and to carry out all customs formalities.

Payment Terms EFT net 30 calendar days, payments will be made upon receipt and acceptance of delivery. No advance payments are allowed.

Deadline to submit your offer

Please use PR15922520 the subject line.

Offers are due by May 5 2026 at 4:00 PM (Bogota, Colombia - local time) via e-mail to bogotagsocompras@state.gov All responsible sources may submit an offer that shall be considered.

Please note that this is a combined synopsis/solicitation for a commercial item, prepared in accordance with the format FAR 12.6, as supplemented with additional information included in this notice. This announcement constitutes the only solicitation; offers are being requested and a written solicitation will not be issued. The solicitation number is PR15922520 and is issued as a Request for Quotation.

mailto:bogotagsocompras@state.gov mailto:bogotagsocompras@state.gov

SENSITIVE BUT UNCLASSIFIED

1. PROJECT INFORMATION

Project Title:

Main Distribution Panel Upgrade (MDP), Installation of Associated Panels, and Reorganization of Electrical Wiring and safety upgrade Project Location:

CMR- Chief of mission residence Type of Work:

Electrical - Main Distribution Panel Safety Upgrade CMR Date: 03/19/2026

2. PROJECT BACKGROUND

The Embassy requires the relocation of the Main Distribution Panel (MDP), installation of the transfer switch panel(s) and other auxiliary panels, as well as the reorganization of existing electrical wiring, to modernize the facilities, improve wiring organization, increase technical safety, ensure regulatory compliance, and provide an efficient and safe electrical distribution.

TECHNICAL DATA AND PREMISES CHARACTERISTICS

• Building Type: Property for residential – diplomatic use.

• Location: Urban area of Bogotá D.C. (detailed information is classified).

• Number of Levels: 2 main floors and a service area (basement).

• Predominant Material: Concrete structure.

• State of Electrical Installation: The distribution system is in good general condition, with concealed raceways and distribution panels on each level. However, there is non-compliance with working clearance requirements and inadequate location of distribution panels.

• Electrical Supply: Three-phase 11.4 kV service with a dedicated transformer stepping down to 120/208 V from the urban grid.

• Grounding System: Existing, connected to copper rods and busbars.

• Approximate Installed Load: LED lighting equipment, residential appliances, HVAC equipment, and communication/security systems.

• Environmental Conditions: Located in an urban area with a cold, humid climate, requiring protection against atmospheric and transient overvoltages.

• Reference Standards: Technical Regulation for Electrical Installations (RETIE 2024) and applicable Colombian Technical Standards (NTC).

BASIC CHARACTERISTICS, USE OF THE INSTALLATION, AND GENERAL TECHNICAL

DATA

• Typical Residential/Diplomatic Service Voltage: 120/208 V – 60 Hz

• Current Type: Alternating Current (AC).

• Approximate Total Installed Load: 92.85 kVA

Load Distribution:

PANEL Standard Application

MDP GENERAL

DISTRIBUTION

BOARD HOUSE

TN-208 TN-110

IN

ST

A L

L E

D L

O A

D S

Receptacles <= 180 VA Art. 220-13 NTC 2050 53240 14580 5760

Kitchen Equipment Art. 220-20 NTC 2050 0 0 0

Fixed Appliances Art. 220-17 NTC 2050 0 0 0

Elevators Art. 620-14 NTC 2050 0 0 0

Motors Art. 430-22(a) NTC 2050 9548.60 2728.17 6820.43

Receptacles >180VA 0 0 0 Special Equipment 12500 10000 2500 Air Conditioning 0 0 0 Lighting 17571.17 800 240 Other loads 0 0 0 Total [VA] 92859.76 28108.17 15320.43 Total [kVA] 92.86 28.11 15.32

• Interior and Exterior Lighting: ~17.5 kVA

• Receptacles: ~53.2 kVA

Phase and Neutral Distribution:

• Supply System: Three-phase, 4-wire (3 phases + neutral).

Load Distribution:

• Lighting and receptacle circuits: Primarily connected at 120 V (phase-to-neutral), balanced across the three phases.

• Special loads (HVAC, pumps, higher power equipment): Connected at 208 V (phase-to-phase).

• Phase Balance: The installation currently exhibits an average current imbalance of 22.74%, which will be explained in the power quality analysis appendix.

• Associated Protections: Thermal-magnetic circuit breakers in distribution panels, with independent phase switching only (non-switched neutral).

Classification of Installations and Locations:

• Property Type: Official residence of a diplomatic nature.

• Classification by Use (RETIE/NTC 2050): Residential use locations.

• Service Voltage Level: Low voltage (≤ 1 kV).

Predominant Environments:

• Dry Locations: Bedrooms, living rooms, support offices.

• Damp/Wet Locations: Kitchen, bathrooms, service area.

• Outdoor Locations: Gardens, circulation areas, and parking.

Environmental Conditions: Urban area with a cold, humid climate; medium risk of atmospheric discharges. Special Zones: Area with communication, security, and HVAC systems requiring a reliable supply and protection. Applied Regulations: Technical Regulation for Electrical Installations (RETIE 2024), Colombian Technical Standard NTC 2050, and NEC 2023.

Identification of Electrical Hazard Zones:

• Main and Secondary Electrical Panels: Risk of direct and indirect contact during operation and maintenance.

• Technical Room: Risk due to concentration of equipment, heat, and proximity of energized conductors.

• Kitchen and Laundry: Electrical risk due to the presence of moisture, steam, and connected high-power equipment.

• Bathrooms and Wet Areas: Risk of electrical contact in proximity to water (receptacles, light fixtures).

• Outdoor Areas and Gardens: Risk from ambient humidity, rain, and potential atmospheric discharges.

• HVAC and Pumping Systems: Risk associated with medium-power electric motors and potential insulation failures.

• Communication and Security Circuits: Low risk, but require protection against overvoltages and atmospheric discharges.

Need for Special Protection Systems Based on Use:

• Differential Protection (GFCI/RCD): Required in bathrooms, kitchens, laundry rooms, service areas, and outdoors to minimize the risk of electric shock in the presence of moisture.

• Transient Surge Protection (SPD): Essential in main and secondary panels to protect communication, security, HVAC, and household appliances from atmospheric discharges and grid disturbances.

• Grounding System: Must ensure adequate resistance values (<25 Ω according to RETIE) to protect people and equipment.

• Lightning Protection: It is recommended to implement a comprehensive system of shielding and lightning arresters due to Bogotá's climatic conditions (medium risk of thunderstorms).

• Selective Coordination of Protections: Application of coordinated thermal-magnetic and differential circuit breakers to ensure service continuity and prevent nuisance tripping.

• Protection of Special Circuits: Circuits for security, communication, and backup systems must have differentiated protections and redundant power supplies.

• Backup Power (UPS / Generator): The existence of uninterruptible power supply systems for critical loads (communication systems, security lighting, and HVAC) is recommended. (The UPS and generator systems are already in place).

• Back up power schedule: The contractor shall submit a back up power schedule for COR approval prior execution.

Categorization of Areas Based on Applicable Regulations:

According to RETIE 2024 and NTC 2050, the installation areas are classified as follows:

Dry Locations:

• Bedrooms, living rooms, support offices, and internal corridors.

• Require conventional protection against overcurrents and indirect contact.

Damp/Wet Locations:

• Kitchen, bathrooms, and laundry.

• Require the use of differential devices (RCD/GFCI), weather-resistant receptacles, and raceways with a minimum IP44 rating.

Outdoor Areas:

• Gardens, circulation areas, and parking lots.

• Must have luminaires and equipment with a minimum IP65 rating, differential circuits, and protection against atmospheric overvoltages.

Technical and Service Zones:

• Electrical panels, HVAC and pumping equipment rooms.

• Classified as restricted access areas with high electrical risk, requiring warning signs and protection against direct and indirect contact.

Special Zones:

• Communication and security area.

• Require service continuity, surge protection, and backup power.

Main Distribution Panel (MDP)

Circuit Main Predicted Load Estimated Power (kW)

CT1: TN-LP1 Security Guards 10.5

CT2: Reserves Equipped Reserves 0

CT3: TN-BP3 Basement Hallway 3.9

CT4: TN-BP4 Perimeter Lighting 9

CT5: TN-BP5 Laundry 5.4

CT6: TN-BP6 Communications Room 0.3

CT7: TN-GP1 Pantry 0.3

CT8: TN-GP2 Coat Room 0.6

CT9: TN-GP3 Kitchen 6

CT10: TN-208 Boiler Room (Technical Room) 25.8

CT11: TN-FP1 Communications Room 0.3

CT12: TN-110 Boiler Room (Technical Room) 15.3

CT13: TN-FP2 Kitchenette 1.5

CT14: TN-VIVERO Greenhouse/Nursery 0.8

CT15: TN-Cancha de tenis Tennis Court 5

CT16: Reserves 0

CT17: Reserves 0

CT18: Reserves 0

CT19: Reserves 0

DESCRIPTION OF PROTECTION SYSTEMS

Protection Against Direct and Indirect Contacts

• Direct Contact: Protection is provided by enclosures, insulation, panel covers, and shrouds that prevent accidental access to energized parts. Thermal-magnetic circuit breakers in the distribution panels also provide overcurrent protection but do not replace the specific function of differential protection.

• Indirect Contact: As this is a system with a separate neutral and ground, the continuity of the equipment grounding conductor and the equipotential bonding of all exposed metallic parts must be ensured to prevent dangerous potential differences.

Protection Scheme for Overcurrents and Overvoltages

• Overcurrents: Already addressed by thermal-magnetic circuit breakers in the panels, which protect against overloads and short circuits.

• Transient/Permanent Overvoltages: There are no Surge Protective Devices (SPDs). According to RETIE, SPDs are required in main panels and at points where there is a risk of overvoltages to protect sensitive equipment.

Additional Safety Systems Based on Project Criticality A diplomatic residence project requires high availability, protection of electronic equipment, and continuity of service. Recommended elements include:

• Differential Protection (GFCI/RCD): With appropriate sensitivity (e.g., 30 mA) for wet locations like bathrooms and kitchens.

• SPD Installation: In the main panel to protect against external and internal surges.

• Coordination of Protections: Ensuring that lower-level devices trip before higher-level ones to prevent unnecessary outages.

• Emergency Signaling: And backup lighting to maintain critical functions during minor failures.

Recommended Protection Configuration

• Service Entrance: → Meter / Service Entrance → SPD Type 1 (if exposed to external/atmospheric events, located before the main breaker) → Main Circuit Breaker (MCCB) → Main Busbars / Grounding bus and equipotential bonding.

• Main Distribution Panel (MDP):

o On the load side of the MDP: SPD Type 2 (mounted close to the main breaker) o Feeders to subpanels, each with a coordinated branch breaker.

• Subpanels (Zonal):

o In subpanels feeding critical equipment: add local SPD Type 2/3.

o In circuits for kitchens, bathrooms, and outdoors: install RCD / GFCI with 30 mA sensitivity.

Recommended Components and Specific Location

• SPD Type 1 (Service Entrance): If the service is overhead or at risk of direct/indirect lightning strikes.

• SPD Type 2 (Main Panel and Subpanels): In the main panel (near the MCCB) and in subpanels feeding server rooms, AV equipment, etc.

• Main Circuit Breaker (MCCB): With an adequate interrupting rating and adjustable trip settings.

• Thermal-Magnetic Circuit Breakers: Already present; verify trip curves (B, C, D). (The main

MDP will be completely replaced with a new board and a protection coordination study).

• Differential Protection (RCD / GFCI): Place on circuits in high-risk areas: bathrooms, kitchens, outdoors, laundry rooms.

Coordination Scheme and Adjustments

• Objective: Selectivity to isolate the fault at the nearest point.

• Practical Steps:

o Determine the available short-circuit current (Isc) at each bus.

o Select trip curves: set the long-time trip at 110–125% of the expected continuous current;

set short-time and instantaneous settings based on short-circuit levels and selectivity with upstream devices.

o Ensure the downstream protection curve falls completely within the operating zone of the upstream device.

Overvoltages — SPD Types and Tiered Strategy

• Type 1: Protection at the service entrance for severe atmospheric discharges.

• Type 2: In the main panel or subpanel for transients generated within the installation.

• Type 3 / Point-of-use: For highly sensitive equipment (servers, sensors).

• Practical Recommendation: Apply a hierarchical scheme (Type 1 at entrance if needed, Type 2 in MDP, Type 3 at critical points).

Differential Protection (RCD/GFCI) — Configuration and Sensitivity

• Human Safety Circuits (bathrooms, kitchens, etc.): 30 mA sensitivity RCDs.

• Equipment / Fire Protection: Higher sensitivity (100–300 mA) selective RCDs can be used.

• Implementation: Install RCDs in subpanel circuits or use GFCI receptacles.

Required Testing, Commissioning, and Maintenance

• Initial Testing (Pre-energization):

o Continuity measurement of the equipment grounding conductor.

o Grounding resistance measurement.

o Verification of equipotential bonding.

• Protection Tests:

o RCD trip test using a test kit.

o Verification of circuit breaker trip settings.

• Periodic Maintenance:

o Annual measurement of grounding resistance and continuity.

o Semi-annual inspection of terminals and connections.

o Monitoring of SPDs and replacement of modules after major events.

Immediate Recommended Actions (Ordered by Priority)

1. Add RCDs/GFCIs to circuits in bathrooms, kitchens, outdoor areas, and the technical room (high priority for occupant safety).

2. Install a Type 2 SPD in the main panel; evaluate the need for a Type 1 SPD based on service entrance exposure (medium-high priority).

3. Perform a coordination study and short-circuit current calculation to adjust the settings of MCCBs and breakers (this study is conducted in the next chapter).

4. Schedule grounding and continuity tests and create a maintenance calendar (annual/semi-annual).

3. OBJECTIVE OF THE SCOPE OF WORK

To execute the relocation of the MDP and related panels, perform controlled de-energization and reconnection of circuits, reorganize wiring according to technical safety standards, carry out final commissioning, and deliver an operational system, ensuring minimal disruption during critical times, regulatory compliance, and quality in materials and execution.

4. SCOPE OF WORK:

Includes, but is not limited to:

• Installation of new overhead cable tray routes, suitable mounting supports, and threaded conduits where required.

• Supply, mechanical, and electrical assembly of the MDP, transfer switch panel, and auxiliary panels (lighting, power).

• Planned and safe disconnection of circuits, physical relocation of components, and necessary splicing/extensions.

• Reorganization of wiring along new routes: removal of old conduits, threading, re-installations, and identification labeling.

• Provision of a temporary power supply to minimize service interruptions.

• Final connection of all wiring, verification of functionality, and testing for continuity, insulation, grounding, voltage drop, and surge protection. This includes the installation of the new electrical lighting panel board supplied by the USG. Accessories required for the final installation of the electrical lighting panel board and MDP shall be included as part of this proposal.

• Installation of raceways for motors or special loads in the technical room.

• Dismantling of temporary setups after final commissioning.

• Delivery of complete "as-built" documentation, manuals, certifications, and training for the responsible operations personnel.

Out of Scope:

• Major structural work not directly related to electrical systems (wall/ceiling modifications, etc.), except as needed for electrical support or fastening.

• Supply of electrical equipment not specified in the approved drawings.

• Future maintenance beyond the warranty period.

5. DELIVERABLES

• Revised and approved design/layout drawings before work begins.

• Detailed schedule with milestones.

• List of materials with technical specifications and quality certificates.

• Project photos (before, during, after).

• Test reports (insulation, continuity, ground resistance, voltage drop, protections).

• Final "as-built" drawings.

• Operation and maintenance manual.

• Certificates of regulatory compliance (RETIE, UL/IEC, or other required).

• Formal handover certificate signed by the client.

ENABLING TECHNICAL REQUIREMENTS

Profile of the Minimum Required Staff

The bidder must guarantee the availability of the following professional and technical personnel for the execution of the contract. Compliance with this requirement will be verified with the presentation of resumes, academic degrees, current professional cards and the corresponding certifications of experience.

Resident Site Engineer

- Education: Professional in Electrical Engineering.

- General Experience: Minimum five (5) years of professional experience, counted from the date of issuance of the Professional License.

- Specific Experience: have held the position of Resident of Construction and/or Director of

Work contributing at least two (2) contracts whose object is similar to that of this process, and whose sum of execution is equal to or greater than two (2) times the value of the offer presented.

- Support: Copy of current professional registration, certificate of validity of the professional registration and certifications issued by the contracting entity specifying object, value and dates.

SISO Professional (Occupational Health and Safety)

- Training: Professional in Occupational Health or Professional with Specialization in Occupational Health and Safety.

- General Experience: Minimum (4) years of professional experience, counted from the issuance of the license in Occupational Health.

- Specific Experience: Submit two (2) certifications of experience in the exercise of their functions in electrical infrastructure projects similar to the object of the contract, where each certification accredits an executed value equal to or greater than two (2) times the value of the bid submitted.

Electrical Technicians (2)

- Training: Graduated Electrical Technicians.

- Legal Requirement: Current professional license issued by the CONTE (National Council of

Electrical Technicians) or similar in the classes corresponding to the object of the work.

- General Experience: Minimum two (2) years of technical experience counted from the issuance of the professional card.

- Specific Experience: Two (2) certifications for each technician, issued by contracting companies, accrediting the performance of electrical work similar to the contractual object.

Electrician Assistants (2)

- Specific Experience: Submit two (2) certifications of experience in work related to the contractual object, duly validated by the company or contracting entity where they provided their services.

Technical Considerations for Evaluation

1. Calculation of Experience: For professionals, experience will be counted from the validity of the professional card (Law 842 of 2003 and concordant).

2. Certifications: All experience certifications must contain: Purpose, start date, end date, value of the contract and functions performed.

3. Similarity: A similar purpose will be understood as that which contemplates the construction of low-voltage electrical networks in commercial and industrial facilities

5. SCHEDULE / MAIN MILESTONES

(A 30-day schedule is suggested as an estimate, subject to confirmation.)

• Work Commencement

• Installation of new mechanical infrastructure

• Disconnection and relocation of transfer switch; partial reconnection

• Temporary installation and physical adaptations

• Final wiring, splicing, progressive circuit reorganization

• Installation of auxiliary technical panels (conduits, motor junction boxes)

• Final tests and commissioning

• Formal Handover

6. TECHNICAL REQUIREMENTS AND STANDARDS

• Compliance with applicable RETIE / NTC standards in Colombia.

• Colombian electrical code standard RETIE will be the govern standard for this solicitation.

• International standards if required by the Embassy / OBO / NEC / UL / IEC for protection, surge suppression, and breaker ratings.

• Interrupting capacity of panels and breakers to be a minimum of 20 kA (per specifications).

• Three-phase electrical system with separate neutral and ground.

• Quality materials: appropriate conductors, raceways, trays, supports, and certified splices.

• Protection against overvoltages, proper grounding, insulation, and continuity.

• Circuit identification, labeling, and orderly wiring.

• All the electrical technicians and engineers must be RETIE certified.

7. SAFETY, OCCUPATIONAL HEALTH, AND PERMITS

• Safe work plan, Lockout/Tagout procedures during disconnection activities.

• Mandatory use of Personal Protective Equipment (PPE).

• Signage and demarcation of work zones.

• Local electrical permits and inspections per Colombian regulations.

• Contractor's insurance and liability for accidents or damages.

8. ROLES AND RESPONSIBILITIES

Party Responsibilities

Embassy / Client Provide site access, existing drawings, electrical specifications, institutional coordination, and approval of designs and materials.

Contractor Supply materials, skilled labor, technical supervision, execute work according to the SOW, perform tests, and provide all deliverables.

Party Responsibilities Supervisor / Technical Inspector

Verify technical and regulatory compliance, conduct inspections, authorize energization, and sign handover certificates.

9. ACCEPTANCE CRITERIA

• Verification that all circuits function correctly under normal load.

• Compliance with insulation, continuity, and voltage drop standards within acceptable limits.

• Surge protection system installed and operational.

• Grounding system resistance within specified limits.

• All documentation delivered, including as-built drawings, manuals, and certificates.

• Signed acceptance certificate by the client or authorized representative.

10. WARRANTIES

• Minimum one (1) year warranty on work performed and materials installed.

• Extended warranty for critical components if specified (e.g., protective devices, transfer equipment).

• Availability of spare parts from the manufacturer/supplier during the warranty period.

11. ADDITIONAL AND COMMERCIAL CONDITIONS

• Payment terms, percentage progress payments based on milestones.

• Penalties for unjustified delays.

• Scope change conditions: any additional work must be approved in writing.

• Acceptance of on-site modifications only if documented and approved.

12. ELECTRICAL DRAWINGS

These drawings show the distribution of feeder circuits in the building, indicating the location of conduits and distribution panels.

This is subdivided into the following drawings:

• Technical Room Detail Drawings: The detail drawing provides enlarged and precise representations of specific elements of the current MDP and its subsequent modification. Its purpose is to show detailed information about connections, assemblies, fixings, and components that cannot be clearly seen in other general drawings.

13. SPECIFICATIONS

STANDARDS

The contractor must comply with all relevant national and international standards. The main standards that must be expressly incorporated are listed below:

Colombian Regulations

• RETIE — Resolution 40117 of 2024, Technical Regulation for Electrical Installations. All materials, equipment, and the electrical installation must comply with the requirements and tests defined therein.

• ICONTEC / Applicable Colombian Technical Standards (NTC), particularly those related to panelboards, raceways, grounding, and electrical protections.

• Certificate of conformity by an ONAC-accredited body. RETIE requires certificates for electrical products, whether imported or locally manufactured.

American / International Regulations

• NEC (National Electrical Code, NFPA 70) — requirements for electrical installation, circuit capacity, protections, conductor routing, clearances, raceways, and protective devices.

• International Building Code (IBC) — for construction, technical spaces, structure, and building safety. The Embassy's "Local-ad" document requires compliance with IBC and NEC, in addition to Colombian standards.

• OBO (Overseas Buildings Operations) Standard Specifications from the U.S.

Department of State — in embassy tenders, it is required that materials/construction comply with OBO standards, NEC, and local codes, and that equipment has recognized international certifications.

• Electrical and workplace safety standards (e.g., NFPA 70E) to ensure personnel protection, lockout/tagout protocols, arc flash prevention, etc.

• Other local and project-specific standards.

Compliance with SpecsIntact Master Specifications (UFGS Division 26) To ensure technical consistency with U.S. Federal design standards and facilitate compatibility with the Department of State requirements, the electrical design, specifications, and verification activities were reviewed under the SpecsIntact system using the Unified Facilities Guide Specifications (UFGS) – Division 26: Electrical.

These specifications provide a structured framework aligned with the CSI MasterFormat and are recognized by the U.S. Army Corps of Engineers (USACE), NAVFAC, and NASA. Although access to the OBO Master Specification Library was not available at this stage, the UFGS Division 26 sections serve as the accepted technical reference for electrical design criteria, materials, installation procedures, and testing requirements consistent with OBO standards.

The UFGS specifications complement the RETIE 2024, NTC 2050, and NEC (NFPA 70) standards already applied in this project, ensuring alignment with U.S. federal construction practices and international quality benchmarks.

The following UFGS Division 26 sections were reviewed and considered applicable to the project scope:

• 26 05 13 – Medium-Voltage Cables

• 26 05 19.00 10 – Low-Voltage Electrical Power Conductors

• 26 05 33 – Raceways and Boxes for Electrical Systems

• 26 05 48 – Vibration and Seismic Controls for Electrical Systems

• 26 05 73 – Overcurrent Protection Coordination

• 26 24 13 – Switchboards

• 26 27 29 – Low-Voltage Wiring Devices

• 26 51 00 – Interior Lighting

• 26 56 00 – Exterior and Roadway Lighting

These sections establish performance parameters, testing protocols, and certification requirements for conductors, raceways, switchboards, protective devices, and lighting systems.

They ensure that all electrical works meet the required levels of safety, reliability, and conformity under RETIE / NTC / NEC / UFGS guidelines, maintaining full traceability and international acceptability of the project documentation.

14. ELECTRICAL INSTALLATION

The building's electrical installation was designed following criteria of safety, reliability, efficiency, and regulatory compliance, ensuring proper energy distribution and correct integration with other technical infrastructures of the building.

Power Distribution Electrical energy is received at the service entrance point from the public grid and is routed to an existing substation, from where it is then channeled to the main distribution panel (MDP). From the MDP, the various sectional panelboards located in different areas of the property are fed.

Voltage Levels

• Low Voltage: 120/208 V – 60 Hz, three-phase system with neutral, for lighting, receptacles, and small equipment.

Circuit Segmentation The installation is divided into independent circuits according to their use:

• Security Guards circuit

• Basement Hallway circuit

• Perimeter Lighting circuit

• Laundry circuit

• Communications Room circuit

• Pantry circuit

• Coat Room circuit

• Kitchen circuit

• Boiler Room circuit

• Kitchenette circuit

• Greenhouse circuit

• Tennis Court circuit

This segmentation allows for better control, facilitates maintenance, and ensures selective protection in case of faults.

Integration with Other Infrastructures The electrical network is coordinated with:

• Backup Systems: UPS for service continuity in critical areas, and a generator set.

• Communications and Security Systems: Separate raceways to prevent electromagnetic interference.

• Grounding System: Integrated to ensure protection against indirect contact and atmospheric discharges.

15. ASSEMBLY AND MATERIALS

The installation specifies electrical materials and equipment that comply with national and international standards for quality, safety, and efficiency, ensuring a reliable and durable operation of the network.

Electrical Conductors

• Type: Electrolytic copper, THHN/THWN-2 insulation.

• Sizes: According to load and regulations (from 12 AWG up to 500 kcmil).

• Compliance: RETIE, NTC 2050, UL 83.

Raceways and Fittings

• Heavy-wall PVC and galvanized IMC conduit, depending on the application area.

• Fill percentage ≤ 40% in accordance with NTC 2050.

• Certified metal and plastic fittings.

Distribution Panelboards

• Manufactured from sheet metal with electrostatic paint finish according to Codensa standard ET-908.

• Protection rating: Minimum IP44 indoors.

• Busbars made of electrolytic copper, with insulation and protective covering.

Protective Devices

• Three-pole and two-pole thermal-magnetic circuit breakers, with nominal capacity according to load calculation.

This section confirms that all material must be certified and regulated, which legally protects the installer and the owner.

16. ELECTRICAL PANEL

The characteristics of the main and distribution electrical panels are detailed, including:

• Location of the main distribution panel.

• Enclosure characteristics (material, IP or NEMA rating, ventilation).

• Dimensions and amperage (A) capacity.

• Arrangement and separation of lighting, power, and special circuits.

Main and Distribution Panelboards Location

• Main Distribution Panel (MDP): Installed in the ground floor technical area, in a room that is easily accessible for maintenance but restricted for unauthorized personnel.

• Distribution Panelboards: Strategically located in the kitchen, on the second floor, and in service areas to optimize circuit distribution and minimize voltage drops.

Enclosure Characteristics

MDP - MAIN DISTRIBUTION BOARD HOUSE

A 208V distribution panelboard, consisting of:

1 Freestanding Metal Cabinet manufactured from cold-rolled sheet metal in compliance with ICONTEC 2050, painted gray RAL 7035, IP 44 rated for indoor use, manufactured according to Codensa standard ET-908. Dimensions: width: 1400 mm, height: 2000 mm, depth: 600 mm.

Main Breaker

• 1 Three-pole, molded-case, industrial-type thermal-magnetic circuit breaker, CVS630F, 40 kA at 220/240V, 30 kA at 440V, with thermal regulation from 350A to 500A.

Manufacturer: Schneider Electric.

• 1 Terminal set for 2x35…300 mm² cable, FC CuAl, CVS/NSX 630. Set of 3pcs.

Manufacturer: Schneider Electric.

Main Busbars

• 1 Three-pole busbar assembly made of electrolytic copper, supported on 600V phenolic resin insulators, identified. Busbar current capacity: 625A.

• 1 Busbar for system neutral connection.

• 1 Busbar for connecting the enclosure to the grounding system.

• 8 Circuit Breakers

• 1 Three-pole, molded-case, industrial-type thermal-magnetic circuit breaker, EZC250N, 50kA at 240V, 25 kA at 440V, fixed thermal setting, 150A nominal current.

Manufacturer: Schneider Electric.

• 1 Three-pole, molded-case, industrial-type thermal-magnetic circuit breaker, EZC250N, 50kA at 240V, 25 kA at 440V, fixed thermal setting, 125A nominal current.

Manufacturer: Schneider Electric.

• 2 Three-pole, molded-case, industrial-type thermal-magnetic circuit breakers, EZC100N, 25 kA at 240V, 12.5 kA at 440V, fixed thermal setting, 75A nominal current. Manufacturer: Schneider Electric.

• 2 Three-pole, molded-case, industrial-type thermal-magnetic circuit breakers, EZC100N, 25 kA at 240V, 12.5 kA at 440V, fixed thermal setting, 50A nominal current. Manufacturer: Schneider Electric.

• 2 Three-pole, molded-case, industrial-type thermal-magnetic circuit breakers, EZC100N, 25 kA at 240V, 12.5 kA at 440V, fixed thermal setting, 100A nominal current. Manufacturer: Schneider Electric.

• 3 Unequipped spare spaces for EZC100N breaker… Secondary Busbars 1

• 1 Three-pole busbar assembly made of electrolytic copper, supported on 600V phenolic resin insulators, identified. Busbar current capacity: 300A.

Circuit Breakers

• 1 Single-pole, DIN rail type thermal-magnetic circuit breaker, 16A, Easy9, 10kA at

127/230V. Manufacturer: Schneider Electric.

• 12 Single-pole, DIN rail type thermal-magnetic circuit breakers, 20A, Easy9, 10kA at

127/230V. Manufacturer: Schneider Electric.

• 2 Three-pole, DIN rail type thermal-magnetic circuit breakers, 63A, Easy9, 10kA at

127/230V. Manufacturer: Schneider Electric.

• 2 Three-pole, DIN rail type thermal-magnetic circuit breakers, 32A, Easy9, 10kA at

127/230V. Manufacturer: Schneider Electric.

• 1 Three-pole, DIN rail type thermal-magnetic circuit breaker, 20A, Easy9, 10kA at

127/230V. Manufacturer: Schneider Electric.

• 1 Single-pole, DIN rail type thermal-magnetic circuit breaker, 32A, Easy9, 10kA at

127/230V. Manufacturer: Schneider Electric.

• 1 Unequipped spare space for EZ9F561xx breaker…

Secondary Busbars 2

• 1 Three-pole busbar assembly made of electrolytic copper, supported on 600V phenolic resin insulators, identified. Busbar current capacity: 300A.

Circuit Breakers

• 12 Single-pole, DIN rail type thermal-magnetic circuit breakers, 20A, Easy9, 10kA at 127/230V. Manufacturer: Schneider Electric.

• 1 Single-pole, DIN rail type thermal-magnetic circuit breaker, 16A, Easy9, 10kA at 127/230V. Manufacturer: Schneider Electric.

• 2 Single-pole, DIN rail type thermal-magnetic circuit breakers, 32A, Easy9, 10kA at 127/230V. Manufacturer: Schneider Electric.

• 1 Three-pole, molded-case, industrial-type thermal-magnetic circuit breaker, EZC100N, 25 kA at 240V, 12.5 kA at 440V, fixed thermal setting, 75A nominal current.

Manufacturer: Schneider Electric.

• 1 Single-pole, DIN rail type thermal-magnetic circuit breaker, 40A, Easy9, 10kA at 127/230V. Manufacturer: Schneider Electric.

• 1 Three-pole, DIN rail type thermal-magnetic circuit breaker, 63A, Easy9, 10kA at 127/230V. Manufacturer: Schneider Electric.

• 1 Two-pole, DIN rail type thermal-magnetic circuit breaker, 20A, Easy9, 10kA at 127/230V. Manufacturer: Schneider Electric.

Dimensions and Capacity

• Main Panel: Approximate dimensions 2000 x 1400 x 600 mm (2.0 m high x 1.40 m wide x 0.60 m deep).

• Nominal Capacity: 800A.

• Busbars: Tinned electrolytic copper, with adequate insulation and certified dielectric supports.

• Short-Circuit Capacity: Main and secondary breakers with an interrupting rating ≥ 40 kAIC.

RACEWAYS

Underground Raceways

• Conduit Material: [To be specified]

• Minimum Installation Depth: 70cm.

Raceways in Buildings

• Use of concealed or surface-mounted conduits: Concealed PVC conduit and surface-mounted IMC.

• Compliance with fire safety regulations: The electrical installation complies with the fire protection criteria required by RETIE 2024, NFPA 70 – NEC, and the provisions of NFPA 70E regarding electrical safety. The measures adopted include:

o Selection of fire-retardant conductors and materials:

Conductors with LSZH (Low Smoke Zero Halogen) and THHN/THWN-2 insulation, with low smoke and toxic gas emission properties in case of fire.

Raceways in metallic and flame-retardant PVC conduit.

o Overcurrent and fault protection:

Installation of thermal-magnetic and differential circuit breakers that act against short circuits, overloads, and ground faults.

Selective coordination of protections to minimize fire risks in case of a fault.

o Distribution and segmentation of circuits:

Independent circuits for lighting, power, and special equipment, preventing overloads.

Panelboards with internal barriers reduce the risk of arc flash and flame propagation.

o Preventive Maintenance:

An annual inspection of connections, panels, and raceways is recommended to detect hot spots or insulation deterioration.

• Cable ampacity and maximum permitted fill: To ensure proper thermal performance and facilitate future expansions, a fill criterion of less than 40% of the usable capacity of the conduit was adopted, depending on the diameter and type of duct. This margin ensures:

o Avoiding overheating conductors.

o Maintaining thermal dissipation capacity.

o Allowing the installation of additional conductors if expansions are required.

Facilitating pulling, removal, and maintenance of wiring.

Auxiliary Works

• Additional elements such as pull boxes, supports, and junction boxes.

• Methods of fastening and mechanical protection.

CONDUCTORS

Specifications for the cables to be used in the electrical installation, considering:

• Conductors must be copper.

• The size must be in accordance with the budgeted quantities, with gauges ranging from

12AWG to 400MCM.

• Insulation type must be THWN-2.

• Current capacity must be in accordance with the load schedule and budget, with a maximum permissible voltage drop of 3% in feeder circuits.

LOADS

Equipment and devices that will receive the electrical supply.

Lighting

• Type of luminaires (LED, fluorescent, halogen).

• Minimum illumination level (lux) according to the application area.

• Switching control (manual, sensors, timers).

Power

• Types of receptacles and their distribution.

• Load capacity of each power point.

• Location and safety clearances.

SURGE PROTECTION

The contractor shall supply, install, and commission a Type 1 Surge Protective Device (SPD) specifically designed for 208V (120/208V Wye), 3-phase + neutral with separate ground systems, mounted in the Main Distribution Panel (MDP) at the entrance position (line side, before the main breaker), in accordance with UL 1449 and/or IEC 61643-11 as applicable. The SPD must be suitable for permanent service use and for protecting against externally generated surges and lightning events.

Minimum Electrical Specifications (Required)

• Type: Type 1 (installation on the line side / secondary of the service transformer).

• Configuration: 3P+N (4-mode) for 120/208V Wye. (Must protect L-N, L-L, and N-G / L-

G).

• MCOV / Nominal Operating Voltage: Not less than the nominal line-to-line voltage (i.e., MCOV ≥ 208V L-L), and the MCOV for L-N and L-L must be indicated on the data sheet.

(UL requires MCOV not to be less than the line-to-line circuit voltage).

• Surge Capacity / Impulse Current (Imax / Iimp / In): Specify the peak current value per mode; a minimum Imax per mode will be required according to local risk (e.g., 20 kA per mode as a minimum reference or based on exposure calculation), and the equipment must withstand the expected energy. (The manufacturer must provide an Imax/Iimp curve/data).

• Voltage Protection Level (VPL or Up): Indicate the VPL for L-N and L-L on the data sheet; it must be compatible with the immunity/withstand level of the protected equipment.

• Coordination Voltage with Protections: The SPD must be coordinated with the protective devices (breakers/fuses) whose minimum required interrupting rating for this contract is 20 kA (SCCR). The contractor must ensure that the breaker-SPD combination does not cause failures due to incompatibility and that the breaker adequately protects the SPD according to the manufacturer's practice and UL/IEC.

MATERIAL COMPLIANCE REQUIREMENTS

Certifications

• New electrical materials and equipment must be certified by internationally recognized standards: IEC, UL, CSA, or equivalents.

• Certificates must include safety tests (electric shock, fire resistance, over-temperature, etc.).

Resistance to External Agents

• Materials with corrosion protection: use of galvanized metals, stainless steel, anti-corrosive paints/resins, protection for elements exposed to moisture, salts, steam, etc.

• Components with an appropriate IP rating if they will be in humid or dusty environments.

• Guaranteed operating temperature range: materials must specify minimum and maximum temperature tolerances corresponding to the local environment and internal conditions of the technical room.

Expected Lifespan and Warranty

• Manufacturers must guarantee a minimum useful life for critical components (e.g., panels, breakers, SPDs) — at least 10 years under normal service conditions, unless a higher specification is required for some sensitive components.

• A warranty of at least 1 year after final acceptance of the work will be required for all materials and equipment. For critical electrical protection components, a longer warranty (2-5 years) may be required by the Embassy.

Other Quality Requirements

• Manufacturers with a good reputation and technical support, with the ability to supply spare parts.

• Factory-marked components with complete data: brand, model, lot, electrical data (voltage, current, interrupting capacity, short-circuit current, etc.).

• Factory tests and on-site acceptance tests: functional tests, electrical compatibility, insulation, continuity, grounding verification, performance underload, loss verification (if applicable), etc.

INSTALLATION VERIFICATION

Definition of the tests and verifications to be performed before commissioning.

• Continuity Tests: Verification of the correct connection of conductors.

• Insulation Measurement: Checking the insulation resistance in cables and equipment.

• Functional Test: Validation of the correct operation of luminaires, receptacles, and equipment.

• Grounding Verification: Measurement of ground resistance and compliance with regulations.

COR/POC: FAC energy program engineer QUANTITY CHART- Quantities are approximate. Contractor must confirm

Description QTY Unit $ /Un COP Supply of ladder-type tray 60 cm × 8 cm × 3 m

5 ea

Supply of supra anchors with 1/4″ screws 100 ea Supply of slotted Unistrut rail 4 cm × 2 cm 3 ea Supply of threaded rod 3/8″ × 3 m 4 ea Supply of 3/8″ nuts 80 ea Supply of 3/8″ washers 80 ea Supply of 3/8″ RL anchors 50 ea Supply of slotted drill bit 1/2″ 2 ea Supply of star-tip drill bit 1/2″ 2 ea Supply of Sikaboom 2 ea Supply of black T8 cable ties 1 pack Supply of black heat shrink tubing for 400 kcmil

1 m

Supply of blue heat shrink tubing for 400 kcmil

1 m

Supply of red heat shrink tubing for 400 kcmil 1 m

Supply of white heat shrink tubing for 400 kcmil

1 m

Supply of green heat shrink tubing for 400 kcmil

1 m

Supply of ladder-type tray 30 cm × 8 cm × 3 m

3 ea

Supply of tinned lug for 400 kcmil cable 15 ea Supply of tinned lug for 500 kcmil cable 15 ea Supply of tinned lug for 2/0 cable 80 ea Supply of tinned lug for #2 cable 15 ea Supply of tinned lug #4 with 1/4″ eyelet 10 ea Supply of tinned lug #6 with 1/4″ eyelet 15 ea Supply of 500 kcmil copper cable 30 m Supply of tubular splice for 500 kcmil 20 ea Supply of gel connector 500 kcmil to 2/0 3 ea Supply of #12 AWG black cable 100 m Supply of #12 AWG blue cable 100 m Supply of #12 AWG red cable 100 m Supply of #12 AWG green cable 100 m Supply of #12 AWG white cable 100 m Supply of #10 AWG black cable 100 m Supply of #6 AWG black cable 100 m Supply of #8 AWG black cable 300 m Supply of bare #2/0 cable 5 m Supply of #2/0 AWG cable 20 m Supply of #2 AWG cable 20 m Supply of self-fusing tape 4 roll Supply of Super 33 tape 6 roll Supply of yellow tape 1 roll Supply of blue tape 1 roll Supply of red tape 1 roll Supply of white tape 1 roll Supply of green tape 1 roll Supply of Tenflex black tape 10 roll Supply of black pull cord 5 m Supply of double-eye clamps 1″ 10 ea Supply of bare #6 AWG cable 30 m Supply of connector for mesh tray 30 ea Supply of tubular splice for 2/0 cable 5 ea Supply of 3/8″ × 1″ stainless steel bolt with nut and washer

20 ea

Supply of eye terminal for #10–12 cable with 1/4″ eyelet

100 ea

Supply of 3/8″ × 1-1/2″ stainless steel bolt with nut and washer

15 ea

Supply of joint for 60 cm tray 10 ea Supply of tubular splice for 2/0 AWG 15 ea

ELECTRICAL CABLE, RACEWAY AND ACCESSORIES

Sub-Total

Description QTY Unit $ /Un COP

Supply and installation of reinforced concrete pedestals 3600 psi, anchored to existing floor, per-unit dimensions 0.10 m (width) × 0.20 m (height) × 3.30 m (length). Includes base/floor preparation, reinforcement, formwork, pouring, floor bonding, curing, finishing, patching, and final cleaning.

2 ea

Supply and installation of a 208 V Main Distribution Board, self-supporting metallic cabinet IP44 for indoor use, dimensions 1400×2000×600 mm, manufactured in accordance with Codensa standard ET-908.

Includes main and secondary busbars in electrolytic copper, main tripolar breaker CVS630F (Schneider Electric), and sectioning through tripolar and monopolar molded case circuit breakers of various ratings (16A, 20A, 32A, 40A, 50A, 63A, 75A, 80A, 100A, 125A, 150A), with breaking capacities ranging from 10 kA to 50 kA depending on reference.

Incorporation of surge protective device (SPD) Class I+II, 65 kA 8/20, 12.5 kA 10/350, with LED indication. Includes terminals, assembly accessories, and safety labeling.

1 ea

Transportation and on-site delivery of all supplied equipment and materials, and disposal of all requiere elements 1 Ls certified personel at all times and electrical back up power supply 1 Ls

Total Direct costs -$ Management 8% -$ Unforseen 6% -$ Profit 5% -$ VAT (Over profit only) 19% -$

DBA

Total Project Cost

CIVIL AND ELECTRICAL WORKS

Sub-Total