Attachment 11 - 07_Narrative_Electrical.pdf

VA PROJECT NUMBER

PROJECT NAME

757-22-705 (1791.19) EHRM Infrastructure Upgrades – Columbus, OH – Tier 2

SUBMITTAL Bid Documents SUBJECT Electrical Narrative

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Electrical Design Narrative Scope of Work The Electrical (Division 26) Scope of work will include support for the following on the

Chalmers P. Wylie VA Medical Center campus:

1. Existing receptacles in the Data Center shall be evaluated and replaced as required.

Additional receptacles will be provided to meet the requirements of the ISTS guidelines.

Receptacles shall be served from the critical branch panelboards.

2. Existing electrical panels serving the Data Center will be evaluated for age and/or capacity and replaced as needed.

3. The critical branch Automatic Transfer Switch (ATS) serving existing Uninterruptible

Power Supplies (UPS’s) in the data center will be evaluated for age and/or capacity and replaced as needed. The essential sources (Normal and emergency) serving critical branch ATS’s for the data will be evaluated for existing capacity and future loads.

4. Phasing will be coordinated with existing operation to minimize any disruption of service.

New Work

1. The Data Center shall be provided with two (2) 208V, 3ph, power bus bars served from two (2) UPS equipment. The bus bars will be coordinated with cable trays, ductwork, and lighting. The UPS’s shall be fed from the critical branch of the essential electrical system of the VA campus. Each rack shall have two sources of power, one connecting into each bus bar. Vertical and horizontal Power Distribution Units (PDU) will be provided for racks to comply with the ISTS / OEHRM guidelines. Power will be provided to the new CRAC’s.

2. A new distribution panel will be provided for the entire Data center. Fire control relays from the Fire Alarm Control Panel will be connected to the Distribution Panelboard to shut down power to the server room in case of a fire in the Data Center. An Emergency

Power Off (EPO) switch will also be provided for a manual shutoff of the Distribution

Panelboard.

3. The existing perimeter receptacles and the rack power will be re-fed from the nearby critical panelboard. A new Critical Panelboard will be provided in each TR room where there is not enough spare breakers on the existing critical panelboard nearby. Rack

757-22-705 (1791.19) EHRM Infrastructure Upgrades – Columbus, OH – Tier 2

SUBMITTAL Bid Documents SUBJECT Electrical Narrative

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PDU’s and rack UPS’s will be relocated to new racks. Lighting in existing TRs will be brought up to latest standards and changed to LED where fluorescent is existing.

4. Security cameras will be relocated to avoid racks as required. New request to exit motion sensors will be provided where none is existing. Existing motion sensors will be networked to new PACS. A Panic/ Duress button will be added by the door per PSRDM requirements.

Applicable Codes and Standards

ASHRAE standard 90.1-2019-Energy standard for buildings except low rise residential buldings

Architectural Barriers Act (ABA) Standards (2015)

VA Barrier Free Design Standard (PG-18-13)

Illuminating Engineering Society (IES) Handbook, 10th Edition

IBC 2021 – International Building Code

IEBC 2021 – International Existing Building Code

IECC 2021 – International Energy Conservation Code

JCAHO EC 7.40 – Emergency Electrical Power System Inspection, Maintenance, and

Testing

NFPA 70-2023 - National Electrical Code (NEC)

NFPA 101-2021 – Life Safety Code

NFPA 110-2022 – Standard for Emergency and Standby Power Systems

NFPA 111-2022 – Standard on Stored Electrical Energy Emergency and Standby

Power Systems

NFPA 780-2020 – Standard for the Installation of Lightning Protection Systems

VA PG-18-10 Electrical Design Manual, December 2019

VA PG-18-10 Lighting Design Manual, January 2022

Infrastructure Standard for Telecommunications Spaces, July 2021

VA PG-18-10 Telecommunications and Special Telecommunications Systems Design

Manual, February 2016

NFPA 99-2021-HEALTH CARE FACILITIES CODE

VA PG-18-10 Physical Security and Resiliency Design Manual, revised July 2022

757-22-705 (1791.19) EHRM Infrastructure Upgrades – Columbus, OH – Tier 2

SUBMITTAL Bid Documents SUBJECT Electrical Narrative

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VA H-18-8 SEISMIC DESIGN REQUIREMENTS

BICSI AND EIA/TIA STANDARDS AS DEFINED IN VA PG-18-10

Electrical Demolition Basic Assumptions:

1. No circuits are shared between the area of work and adjacent spaces.

2. Equipment being demolished can be de-energized prior to the contractor performing any work so that work on live equipment will not be required.

3. This project will not include the removal of any equipment containing PCBs

Demolition of electrical work will include:

1. Existing Lighting in the Server Room and Telecommunication Rooms (TR’s).

2. Existing General Receptacles in the TR’s.

Building Power Distribution Systems All building power distribution systems requiring modification or expansion are 208Y/120V.

The new power distribution will be installed and brought online while maintaining all the existing power distribution for the Server Room and TR’s.

Electrical Calculations Voltage drop calculations will be performed for all new feeders and branch circuits. Feeders and branch circuits will be sized to limit voltage drop to the levels recommended by the energy code (2% for feeders, 3% for branch circuits, with the combined drop no more than 5%).

Preliminary fault currents will be calculated to determine the available interrupting current (AIC) rating at the primary and secondary sides of the transformer and at the loads they serve.

These calculations will be performed via SKM PowerTools for Windows software. Final fault current and arc-flash calculations will be performed by the electrical equipment supplier and based upon installed equipment on the project. A protective device coordination study will also be performed by the electrical equipment supplier and all recommended settings will be implemented at the time of installation.

General Electrical Equipment

Switchboards and Distribution Panelboards

New distribution panelboards will be sized for the loads they serve and include 30% spare capacity and spare space. Panelboard bussing will be copper. The distribution

757-22-705 (1791.19) EHRM Infrastructure Upgrades – Columbus, OH – Tier 2

SUBMITTAL Bid Documents SUBJECT Electrical Narrative

Electrical 4 panelboard ampere interrupting current (AIC) rating will be fully rated and sized based on the available fault current. Floor mounted distribution panelboards will be mounted on a 4” tall concrete house-keeping pad.

New circuit breakers in existing switchboard and distribution panelboards will have available ampere interrupting current (AIC) ratings to match the panelboard.

Panelboards

New panelboards will be provided as required for the project. Panelboards will include main circuit breakers where required by the NEC and bolt-on style circuit breakers.

30% spare capacity will be provided per the VA Electrical Design Manual. Bussing will be copper. Fault currents will be calculated to determine the AIC rating for the panelboard and circuit breakers. All panelboards and circuit breakers will be fully rated.

Panelboards will be provided with clear, concise schedules.

Disconnect Switches

New disconnect switches will be provided for HVAC equipment. Switches will be heavy duty style, rated for the environment installed in and fused if required to protect equipment from high available fault currents. Disconnecting means will be provided within sight of all motors and other equipment.

Motor-rated disconnect switches will be provided for any fan-powered boxes.

Building Feeders, Branch Circuits, and Raceways

All conductors will be copper and routed within raceways.

A copper ground conductor will be routed with all circuits except building service entrance feeders.

Minimum raceway size will be 3/4” above grade and 1” below grade.

Wiring Devices

Receptacles will be hospital grade, NEMA 5-20R grounding type, and ivory in color as required by the VA design guide.

Cover plates will be 302 brushed stainless steel. Cover plates for devices fed from emergency circuits will be 302 brushed stainless steel and engraved with

“EMERGENCY” with red letters.

Grounding and Bonding

757-22-705 (1791.19) EHRM Infrastructure Upgrades – Columbus, OH – Tier 2

SUBMITTAL Bid Documents SUBJECT Electrical Narrative

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Equipment grounding conductors will be installed with all feeders, and power and lighting branch circuits.

All metallic raceways will be grounded and the equipment grounding conductor will be bonded to all junction boxes, pull boxes, enclosures and panelboards.

Labeling/Nameplates

All new and/or modified medium-voltage site and building distribution equipment will be provided with new phenolic resin labels screwed to the equipment. Normal power distribution equipment will have white lettering on a black background. Essential electrical distribution equipment will have white lettering on a red background. Lettering will be 1” tall and include the name of the equipment, name of the equipment it is fed from, and the sizes of the conductors that it is fed with.

All new and/or modified low-voltage building electrical distribution equipment will be provided with new phenolic resin labels screwed to the equipment. Normal power distribution equipment will have white lettering on a black background. Essential electrical distribution equipment will have white lettering on a red background. Lettering will be ½” tall and include the name of the equipment, name of the equipment it is fed from, and the sizes of the conductors that it is fed with.

All new wiring device cover plates will be labeled with a permanent adhesive label listing panel and circuit feeding the wiring device.

GENERAL LIGHTING EQUIPMENT

Building Lighting

Lighting within the Server Room and TR’s will consist of strip light style fixtures with

LED light sources with integral lamps and drivers. Drivers will be a minimum of 85% efficient at full load, have a power factor greater than 95%, total harmonic distortion less than 20%, and operate with a universal 120/277V input.

New Suspended LED lighting in the Server Room will be coordinated with cable trays, ductwork, and bus bars.

Exit light fixtures will be LED type with red lettering and a brushed aluminum finish.

Fixtures will be single or double-faced with directional arrows as required.

Lighting Controls

757-22-705 (1791.19) EHRM Infrastructure Upgrades – Columbus, OH – Tier 2

SUBMITTAL Bid Documents SUBJECT Electrical Narrative

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Standard manual light switches will be quiet toggle type, specification grade and ivory in color as required by the VA design guide. Manual light switches will be utilized in the

Server Room and the TR’s, since automatic control of lights would be detrimental to the occupant.