ATTACHMENT 4 - 05 757 21 701 Narrative_Electrical.pdf

VA PROJECT NUMBER

PROJECT NAME

757-21-701 EHRM Infrastructure Upgrades – Columbus, OH – Tier

SUBMITTAL Bid Documents SUBJECT Electrical Narrative

DIVISION 26 ELECTRICAL

1. GENERAL

A. The electrical portion of this project will include support for the following on the Chalmers P.Wylie VA Medical Center campus:

1. Provision of essential power from the critical branch to serve receptacles in the telecommunication rooms (TR).

2. Provision of additional receptacles for TR and/or Server rooms.

B. Specific provisions for this project will include evaluating the electrical service, and expanding electrical distribution as required to provide new receptacles in the TR closets. Each TR will be evaluated to ensure it has the required number of circuits & receptacles for the number of data racks. The critical branch of the essential electrical system (EES) will be used to serve circuits in the TR’s. Individual racks will be provided with uninterruptible power supplies (UPS) that are compliant with the VA OEHRM design manual. Each telecommunication rack will also be provided with at least (2) vertical power distribution units (PDU) to serve power to communication equipment on racks. All telecommunication rooms will be evaluated to ensure all equipment complies with single point grounding per OEHRM design guidelines.

2. ELECTRICAL CODES AND STANDARDS

A. Americans with Disabilities Act

B. ASHRAE Standard 90.1-2019 – Energy Standard for Buildings

C. Illuminating Engineering Society (IES) Handbook, 10th Edition

D. IEBC 2018 – International Existing Building Code

E. IECC 2018 – International Energy Conservation Code

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

G. NFPA 70-2020 - National Electrical Code (NEC)

H. NFPA 99-2021 – Standard for Healthcare Facilities

I. NFPA 101-2021 – Life Safety Code

J. NFPA 110-2019 – Standard for Emergency and Standby Power Systems

K. NFPA 111-2019 – Standards for Stored Energy Power Systems

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

M. VA PG-18-10 Lighting Design Manual, December 2015

N. VA PG-18-10 Telecommunications and Special Telecommunications Systems Design Manual – February 2016

O. Office of Information and Technology (OIT) Infrastructure Standard for Telecommunications Spaces v3.0 (21 Aug 2020)

P. OEHRM Site Infrastructure Requirements

3. ELECTRICAL DEMOLITION

Demolition of electrical work will include:

A. Replacement of any existing individual UPS’s serving each telecommunications rack and/ or room.

B. Receptacles located in each server room will be analyzed to confirm they are on the proper branch of the EES. Any outdated, hazardous or improper receptacles will be demolished.

C. Existing receptacles mounted on TR racks will be removed.

4. SITE POWER DISTRIBUTION SYSTEMS

A. Minimal to no site power distribution system modification is anticipated.

757-21-701 EHRM Infrastructure Upgrades – Columbus, OH – Tier

5. BUILDING POWER DISTRIBUTION SYSTEMS

A. All building power distribution systems requiring modification or expansion are 208Y/120V.

B. In Building ACC, all existing TR’s appear to be fed from critical and/or normal branch(es) in adjacent electrical rooms. Most of the receptacles in TR's are quad type and on critical branch. There are 30A twist-lock receptacles on racks and walls to serve UPS's in existing TR's. Some of the racks also appear to have power strips to supplement outlets to support communication equipment on racks. For this project, each TR will be fed by at least two circuits from critical panelboards in adjacent electrical rooms.

Two 20A twist-lock receptacles will be provided on top of single telecommunication rack setups to serve power to UPS and rack mounted PDU’s. 30A twist-lock receptacles will be provided for two (2) floor telecommunication rack setups and 60A, 3ph power junction box will be provided to serve power for three (3) floor telecommunication rack setups. Vertical power distribution units (PDU) will be provided on the side of racks to support communication equipment.

C. The TR’s in Building ACC are not properly grounded in accordance with current telecommunications standards. A new main telecommunications ground bar (MTGB) will be installed in the server room and tied back to the main electrical service ground upstream. Downstream, grounding cables will be extended from the MTGB to a new ground bars in each TR. All required components within each TR will be bonded to the new TR ground bars.

D. Existing Telecommunication Ground Bars in TR’s of Engineering Building and Energy Center will be bonded to existing electrical Panel ground bus in respective building. Ground bars in TR’s in Engineering and Energy Center buildings shall also be bonded to the nearest steel column.

6. ELECTRICAL CALCULATIONS

A. 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%).

7. GENERAL ELECTRICAL EQUIPMENT

A. Switchboards and Distribution Panelboards

1. 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 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.

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

B. Surge Protection

1. A Type 2 Surge Protective Device (SPD) will be provided at panelboards that serve sensitive electronic equipment.

C. Uninterruptible Power Supplies (UPS’s)

1. Each UPS serving rack-mounted equipment will be replaced. Each UPS will be sized to provide a minimum of 20-minute run-time.

2. Each data rack in the individual telecommunication rooms will be provided with a new UPS.

3. All UPS’s in the individual telecommunication rooms and in the Server Room will be BACnet compatible and will be capable of monitoring the following:

a) Room Temperature

b) Room Humidity

c) UPS status

D. Panelboards

1. 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. 20% spare capacity will be provided per the VA Electrical Design Manual. Bussing will be copper. Fault currents will be

757-21-701 EHRM Infrastructure Upgrades – Columbus, OH – Tier calculated to determine the AIC rating for the panelboard and circuit breakers. All panelboards and circuit breakers will be fully rated.

2. Panelboards will be provided with clear, concise schedules.

E. Disconnect Switches

1. 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.

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

F. Building Feeders, Branch Circuits, and Raceways

1. All conductors will be copper and routed within raceways.

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

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

G. Wiring Devices

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

2. 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.

“EMERGENCY” receptacles shall be red in color.

3. Tamper-resistant receptacles will be hospital grade, NEMA 5-20R grounding type, and gray in color.

4. Ground-fault circuit interrupter (GFCI) style duplex receptacles will be provided within 6’ of all sinks.

5. Exterior receptacles will be weather-resistant, GFCI style duplex receptacles and be provided with while-in-use covers.

H. Grounding and Bonding

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

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

3. New equipment installed will comply with single point grounding per ANSI/NECA/BICSI 607-C.

4. Each telecommunications room will be analyzed to ensure it is meeting VA design standards for internal Communications Circulating Grounding System (CCGS). This includes:

a) Ensuring all equipment is properly grounded to the Telecommunication Ground Bar (TGB)

b) Ensuring the TGB is connected to the Telecommunications Main Grounding Busbar (TMGB).

5. See Appendix A for General Grounding and Bonding Diagram for each telecommunications room

6. See Appendix A for General Grounding and Bonding requirements for each building (per 2016 VA

Telecommunications Design Guide, Appendix A).

I. Labeling/Nameplates

1. 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.

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

3. All new grounding conductors will be labeled to indicate the telecommunication rooms they serve and the TMGB they are bonded to.

757-21-701 EHRM Infrastructure Upgrades – Columbus, OH – Tier

8. PHYSICAL SECURITY

A. Cameras:

1. Security camera - indoor hd ptz dome surveillance camera, 12x optical zoom with autofocus, 10x digital zoom, 1080p resolution at 35/30 frames per second, h.264 stream. Ip51 rated against dust and dripping water (suitable for sprinkler activation conditions), power-over-ethernet (max 13 watts), 1/2.3" cmos sensor, 3.8-42.99mm focal length, f1.4-f2.1 variable maximum aperture, 360° pan, 180° tilt. Furnished and installed by contractor. Provide all necessary power supplies, surge protector, mounts and wiring for power, data, and control for a complete installation.

2. All cameras shall notify police upon activation of door contact.

B. Physical security measures outlined in Force Protect’s gap analysis dated 21 June 2021 that are not addressed in this project shall be addressed in future projects. This includes panic duress, securing duct penetrations, server room modifications, etc.

END DIVISION 26 DESIGN NARRATIVE

757-21-701 EHRM Infrastructure Upgrades – Columbus, OH – Tier

Appendix A: Drawings

General Grounding and Bonding Diagram for each telecommunications room:

757-21-701 EHRM Infrastructure Upgrades – Columbus, OH – Tier

General Grounding and Bonding requirements for each building (per 2016 VA Telecommunications Design Guide, Appendix A):