Q and A - B6930 Breakers 20260820.pdf

Project Question Answer

B6930 Breakers

Applicable NAICS Code The solicitation cover and project description identify NAICS 238210 – Electrical Contractors and Other Wiring Installation Contractors; however, the Annual Representations and Certifications section references NAICS 238990. Please confirm that NAICS 238210 is the correct NAICS code applicable to this procurement.

Applicable NAICS is NAICS 238210 – Electrical Contractors and Other Wiring Installation Contractors.

B6930 Breakers

Replacement Switchboard Manufacturer / Basis of Design The SOW requires replacement of the existing 1,000A 480V and 1,000A 208V QMB fused-bucket service switchboards with new group-mounted circuit-breaker distribution switchboards capable of supporting molded-case circuit breakers.

Please confirm whether the Government has a required manufacturer, basis-of-design product, or approved manufacturer list. If not, please confirm that equivalent equipment meeting the specified electrical and physical requirements may be proposed.

Equivalent equipment meeting the criteria may be proposed.

There is no preferred manufacturer.

B6930 Breakers

Available Fault Current / AIC Rating Please provide the available fault current at each Main Distribution Panel and confirm the minimum required short-circuit interrupting/AIC rating for the new switchboards and circuit breakers. If this information is not available, please confirm whether the Contractor is responsible for performing the calculations necessary to establish the required equipment ratings.

Panel 1: 480/277V, 3 Phase 4 Wire, 1000 AMP. Panel 2: 208/120 3 Phase 4 Wire, 1000 AMP

B6930 Breakers

Short-Circuit, Coordination and Arc-Flash Studies Please confirm whether the Contractor is required to provide a short-circuit study, protective-device coordination study, arc-flash hazard analysis, updated arc-flash labels, and/or breaker trip-setting calculations. If required, please identify the applicable standards and required submittal/acceptance criteria.

No, contractor is not required to provide a short-circuit study, protective-device coordination study, arc-flash hazard analysis, updated arc-flash labels, and/or breaker trip-setting calculations.

Panel 2 Breaker Schedule For Panel 1, the SOW provides specific breaker quantities and amperages. For Panel 2, the SOW states that the new equipment is to match the existing circuit configuration but does not provide a complete breaker schedule. Please provide the required breaker sizes, quantities, poles, interrupting ratings, and other applicable characteristics for Panel 2, or confirm that bidders are to field-verify the existing configuration and provide equivalent replacement breakers.

Panel 2 Breaker. Circuit 1, LP5K, 200 AMP, Fuse: 200 AMP.

Circuit 2 LP4K, 200 AMP, Fuse 200 AMP. Circuit 3, LP3K, 200 AMP, Fuse: 200 AMP. Circuit 4, LP2K, 200 AMP, Fuse: 200 AMP.

Circuit 5, PANEL (E), 200 AMP, Fuse: 200 AMP. Circuit 6, PANEL (D), 200 AMP, Fuse: 200 AMP. Circuit 7, PANEL (C), 200 AMP, Fuse: 200 AMP. Circuit 8, X-RAY, 60 AMP, Fuse: 60 AMP. Circuit

9, SPARE, 60 AMP.

B6930 Breakers

Existing Feeder and Branch-Circuit Reconnection The SOW requires all existing feeders and branch circuits to be reconnected to the new panels. Please confirm whether the existing conductors are expected to have sufficient length and condition for direct reconnection. If conductors require extension, replacement, splicing, or modification to accommodate the new equipment, please confirm whether such work is to be included in the Base Bid and provide any applicable conductor/splicing requirements.

Unknown whether exisitng conductors have sufficient length.

Contractor should include any required extensions in bid. Follow UFC, NFPA, NEC for conductor/splicing requirements.

B6930 Breakers

Permitted Electrical Outage Duration and Phasing The SOW requires utility outages to be coordinated with the COR, generally performed outside normal business hours, with seven days' advance notice. Please identify the maximum allowable outage duration for replacement of each MDP.

Please also confirm whether Panel 1 and Panel 2 may be replaced during separate outages, whether either panel must remain energized while the other is being replaced, and whether weekend or overnight replacement activities should be assumed for pricing.

Yes, may be separate outages or both down concurrently. Work should occur within normal business hours unless requested/coordinated with Government. Max 2 day outage.

B6930 Breakers

Temporary Power Responsibility The SOW states that the Government is responsible for powering mission-critical devices during planned outages, while also requiring the Contractor to provide backup services if systems are not fully functional. Please clarify the division of responsibility for temporary power during MDP replacement and identify which loads the Government will maintain versus any temporary power that must be provided by the Contractor.

Mission critical services can be powered by Government facility generators during planned outages. Max 2 day outage.

ATS / Generator Testing The SOW requires the ATS and generator circuit associated with Panel 1 to be disconnected, reconnected, and tested. Please identify the required testing procedure and acceptance criteria, including whether a simulated loss-of-utility-power test, generator operation under load, load-bank testing, Government witnessing, and/or a written test report are required.

Simulated loss of utility power test to ensure the system works as intended if a power outage occurs. Government inspector on site during test will be required.

B6930 Breakers

Electrical Testing and Commissioning Requirements The SOW requires complete testing of all new equipment to ensure proper operation but does not identify detailed testing procedures. Please provide the required electrical testing and commissioning requirements for the new switchboards, breakers, feeders, and associated circuits, including applicable standards, test procedures, documentation, and acceptance criteria. Please also confirm whether testing must be performed by an independent third-party testing firm or may be performed by the installing electrical contractor.

Contractor shall complete operational testing of equipment.

Third-party testing is not required. COR must be on site during testing.

B6930 Breakers

Equipment Room Access / Rigging Please confirm that the existing doors, corridors, and access routes are adequate for removal of the existing switchboards and installation of the new equipment. If the existing or new equipment must be disassembled for removal or installation, please confirm whether bidders should include this work in the Base Bid and whether any architectural modifications are anticipated.

It's anticipated that equipment will need to be disassembled for removal. No architecual modifications will be made to the building. If the equipment must be disassmenbled then the bidders will need to take cost into account with base bid.

B6930 Breakers

Existing Equipment Disposal The SOW requires disposal of the existing MDPs. Please confirm whether the removed switchboards, breakers, copper conductors, and related electrical equipment become Contractor property for recycling/disposal or whether any components must be retained and turned over to the Government.

Refer to SOW 1.13 and 1.14.

Performance / Payment Protection The SF 1442 indicates that required performance and payment bonds are to be furnished within 10 calendar days after award. The solicitation also includes FAR 52.228-13, Alternative Payment Protections. Please confirm the specific performance bond and/or payment protection requirements and required percentages applicable to this project.

Both Performance and Payment bonds are required if the resultant contract award exceeds $150,000 as required by the Miller Act and RFO FAR 28.102-1(a). RFO FAR 52.228-13, Alternative Payment Protections applies below this threshold and requries a Payment protection only, Payment Bond is preferred. Penal amount for Performance and Payment bonds or alternate payment Protections is 100% of the contract price, as stated in RFO FAR 52.228-13 Alternative Payment Protections and RFO FAR 52.228-15 52.228-15 Performance and Payment Bonds-Construction.

B6930 Breakers

Limitations on Subcontracting The solicitation is issued as a 100% Small Business set-aside. Please confirm whether FAR/RFO 52.219-14 applies to this procurement and, if applicable, identify the subcontracting limitation that will govern contract performance.

RFO FAR 52.219-14 Limitations on Subcontracting is not included in the contract and does not apply.

B6930 Breakers In the scope of work, the amperage rating of the breakers for the piece of 208v switch gear are not listed. Is there any way to get a list of what size breakers this panel will need?

Panel 2 Breaker. Circuit 1, LP5K, 200 AMP, Fuse: 200 AMP.

Circuit 2 LP4K, 200 AMP, Fuse 200 AMP. Circuit 3, LP3K, 200 AMP, Fuse: 200 AMP. Circuit 4, LP2K, 200 AMP, Fuse: 200 AMP.

Circuit 5, PANEL (E), 200 AMP, Fuse: 200 AMP. Circuit 6, PANEL (D), 200 AMP, Fuse: 200 AMP. Circuit 7, PANEL (C), 200 AMP, Fuse: 200 AMP. Circuit 8, X-RAY, 60 AMP, Fuse: 60 AMP. Circuit

9, SPARE, 60 AMP.

B6930 Breakers

The 480v gear is being reduced from 3 sections to 2 sections and there is a 400A feed in the current 3rd section are we to make splices to extend the conductors and pipe to the second section or pull in a new feed from the gear to the equipment, and if we are to pull in a new feed should we quote copper or aluminum conductors?

Pull in a new copper feed.

B6930 Breakers You are looking to replace the existing switchgear with the same footprint of gear minus the 3rd section on the 480v so we will need to use Square D Switchboards?

It requires the same footprint, whatever will fit.

B6930 Breakers What is an acceptable down-time for the main? 2-3 days?

2 days is an acceptable down-time for the main with prior notification and approval of the COR.

The SOW identifies the existing equipment as a 1,000A, 208V QMB fused-bucket service panel and requires the new switchgear to match the existing circuit configuration; however, the individual breaker amperage ratings and quantities for the 208V panel are not provided in the SOW or drawings.

Refer to previous RFI response.

B6930 Breakers Could the Government please provide the existing breaker schedule, panel schedule, one-line diagram, or a list of the required breaker sizes and quantities for the 208V switchgear?

Refer to previous RFI response.

B6930 Breakers What is the current measurement of the existing footprint for the current switch gear?

Panel 1 Footprint: 9' wide, 7'8" tall, 2' deep.

Panel 2 Footprint: 6' wide, 7'8" tall, 2' deep.

B6930 Breakers What is the expected shut down time?

2 days is an acceptable down-time for the main with prior notification and approval of the COR.

B6930 Breakers Is the surge protection equipment existing to remain or apart of what needs replaced?

Surge protection will remain

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