Attachment 01 Omaha EHRM 100 Narrative Elec Revised.pdf

Issue for Bid

Omaha EHRM, Project# 636-21-704

May 15, 2023

Electrical

Design Criteria

The following codes, standards, and recommended practices from the VA:

NFPA 70 National Electrical Code, Current Edition

NFPA 72 National Fire Alarm and Signaling Code

NFPA 99 Health Care Facilities Code

NFPA 101 Life Safety Code

VA Guidelines VA Electrical Design Manual – 2019

VA Guidelines VA Lighting Design Manual -2015

IBC International Building Code, Latest Edition, as referenced by UFC 3-600-01 and

UFC 1-200-01

IESNA Illuminating Engineering Society of North America

ABA Architectural Barriers Act Accessibility Standard

ANSI C2 National Electrical Safety Code

VA OIT Infrastructure Standard for Telecommunications Space Version 3.1

OEHRM Site Infrastructure and End User Device (EUD) Requirements, 2021

1. Power Systems

a. Normal Distribution

I. Each IT closet will have a duplex convenience outlet located on each wall.

II. Additional Receptacles may be installed in renovated spaces due to new IT closet locations. These receptacles will be connected to new circuit in room.

III. For building 1, new medium voltage substation will be provided in the new generator building. New normal power feeders will be brought to connect the new automatic transfer switches.

IV. For ACC building, new distribution panel and branch circuit panels will be provided to comply with the VA OIT design manual.

V. For buildings 2, 6, 8, 9 and D, new branch panelboards will be provided in each

TR room. The new panelboards will be connected to the building main distribution panels.

VI. For Building 15 new circuit breaker will be provided in existing MDP. New transformer and panelboards will be provided in the new TR room.

mergency Distribution

i. Each IT closet will be provided with one 60A, 208/120V, minimum 30-circuit electrical panel served from the generator where available in the buildings.

ii. If no emergency power in the building, the electrical panel will be on normal power.

iii. 208V, 3 phase type L21 (20amp and 30amp) power outlets and J-boxes will be installed on cable trays above the equipment racks.

iv. 5KW, 208V, 3 phase, rack mounted UPS and power distribution unit (PDU) will be provided for each rack per VA ISTS v3.1 design guide. UPS in racks will be connected to utility power (A side). Zone PDU information is indicated on drawing E-400.

v. For building 1, central UPSs will be provided with two paths of distribution for the Server room only. The UPS will provide power for the campus network center and fiber distribution in the building. Automatic transfer switches, power distribution panels, K-13 rated step down transformers, and power distribution panels will be provided.

vi. Design team is working with the VA to evaluate new generator location and capacity required for building 1.

vii. For building 15, new transfer switch, circuit breakers and K-13 rated stepdown transformers will be provided in existing electrical rooms.

b. Branch Distribution

i. The branch circuit panels serving lighting and receptacle loads will use molded case, thermal magnetic type circuit breakers.

ii. Branch circuits to power outlets serving the racks will have 200% neutral.

iii. All general-purpose lighting will use 277 volts.

iv. Minimum wire size will be #12 for power circuits and #18 for controls circuits.

v. A dedicated neutral conductor will be provided in all branch circuits.

vi. Feeder sizes will be increased as required to limit voltage drop from the branch circuit panel to the terminal device to not more than 3%.

vii. Panelboards and feeder serving the TR rooms will be provided with 200% neutral.

viii. All branch panelboards will be furnished with surge protection devices and metering needs.

2. Lighting Systems

a. Lighting design for this project will meet requirements listed in the latest version of the

VA Lighting Design Manual.

I. All luminaires will comply with required Correlated Color Temperature (CCT) and minimum Color Rendering Index (CRI) values for their given location listed in the previously stated design manuals.

II. New fixtures will be LED strip fixtures in open ceilings with integral occupancy sensors and controls for multilevel dimming.

III. New LED strip will be provided in existing TR spaces which will be utilized for this project.

IV. Rooms that are renovated due to new IT closet will have new light fixtures and light controls modified to fit the new space.

b. Lighting Controls

i. Lighting fixtures will be provided with integral occupancy sensors programmed to turn lights on in different levels per OIT design guides. Each new IT closet will have manual light switches installed to shut-off light fixtures.

c. Emergency Lighting

I. Each TR closet will be provided with at least 50% lights on critical branches or with emergency battery packs. Where generator power systems exist, emergency lighting will be connected to the generator backed up panels.

II. Egress lighting and exit signage will be served from existing emergency/life safety branch panels.

III. Exit signs will be LED type.

3. Grounding System Requirements:

A green insulated equipment ground copper conductor, sized per National Electrical Code

250.122, will be run with all feeders and branch circuit homeruns.

4. Fire Alarm System Requirements:

a. The existing fire alarm system will be modified as required to serve the renovated areas.

b. System notification will consist of ADA- and NFPA-compliant audio (tone), visual, and combination audio/visual devices.

c. Fire alarm smoke detectors will be provided in all TR rooms. Duct smoke detectors will be provided for HVAC equipment where required.

d. All fire alarm system wiring will be installed in red-colored conduit.

e. Fire alarm for the new generator building will be connected to the existing fire alarm system in building 1.

5. Identification of Electrical System:

a. Labeling for Raceways

i. 600 Volts and Below Normal: White letters on black background indicating feeder identification and voltage.

ii. Fire Alarm: Red letter on white background indicating “Fire Alarm”.

iii. Temperature Control: White or black letters on blue background.

iv. Grounding: White letters on green background indicating “Ground” and equipment and designation.

b. Provide color conduits as follows for all EMT:

i. Fire Alarm System: Red.

ii. Normal Power Distribution System: Silver.

iii. Temperature Controls, Motor Controls and Other Control Systems: Blue.

iv. Grounding: Green.

c. Labeling Instructions

i. Indoor Equipment: Self-adhesive, engraved laminated acrylic or melamine label.

Unless otherwise indicated, provide a single line of text with 1/2” high letters on

1-1/2” high label. Where two lines of text are required, use labels 2” high.

ii. Elevated Components: Increase size of labels and letter to those appropriate for viewing from the floor.

iii. Unless provided with self-adhesive means of attachment, fasten labels with appropriate mechanical fasteners that do not change the NEMA or NRTL rating of the enclosure.

iv. Equipment to be labeled:

a) Panelboards.

b) Switchboards,

c) UPSs,

d) Transformers

e) Automatic Transfer Switch

f) Disconnect Switches and Enclosures

g) Access doors and panels for concealed electrical items.

h) Color coding of equipment nameplates will be as follows:

1) Normal Power: Black plate with white lettering.

2) Fire Alarm: White plate with red lettering.

3) Temperature Controls: Blue plate with white lettering-to include VAV boxes.

4) Grounding: Green plate with white lettering.

v. Each switch and receptacle will be identified as to the circuit and panelboard from which it is fed. This will be identified both inside the junction box

(permanent magic marker) and on the cover plate.

vi. All junction, pull, and connection boxes will be provided with identification on the cover. Identification will be neatly handwritten with permanent magic marker denoting the wiring system, voltage, and panel and circuit numbers.

vii. Panelboard directories will be created using Microsoft Word and the typed printout should be provided in each panel. The Word file will be turned over to the Owner upon completion of the project.

7. Firestopping:

i. All penetrations to fire rated wall will be fire stopped and labeled

8. New Generator and Substation

a. As part of EHRM project a new diesel fuel generator will be required for building

1 main computer room and all new telecommunications room (TR) OIT loads.

The generator will be indoor on a concrete pad with a day tank. The generator will be sized for the calculated loads of all OIT loads, lighting and wall receptacle loads, and HVAC equipment loads.

b. An on-grade diesel fuel storage tank will be provided for a minimum 96 hours of fuel capacity. Refer to mechanical for fuel tank details.

c. For normal power for building 1 EHRM loads, a new medium voltage substation will be provided. The substation will be in the new generator building.

d. Power Distribution

i. 480V transfer switches and power distribution panels will be provided serving the new EHRM loads. The equipment will be in the new generator building.

ii. 280V distribution panels and transformers will be in the existing mechanical room on basement level. This mechanical space is also used by a separate project which is on-going currently. It has been confirmed from both EHRM project and the on-going project should work.

e. New Site Power Ductbank

i. New power ductbank will be provided among the new generator building, building 24 and building 1. Detailed ductbank locations and existing ductbank information will be coordinated in the next submission. Medium voltage cables from building 24 to the substation will be in a separate ductbank

f. New light poles for new parking areas

New light poles will be provided for the new parking areas by buildings 16 and 8. New light poles will match existing. One light pole will be relocated at the generator location.

g. Lighting and Controls in Generator Building

i. Lighting design for the generator building will meet requirements listed in the latest version of the VA Lighting Design Manual.

ii. All luminaires will comply with required Correlated Color

Temperature (CCT) and minimum Color Rendering Index (CRI) values for their given location listed in the previously stated design manuals.

Fixtures will be LED strip fixtures in open ceiling.

iii. Lighting Controls - Lighting fixtures will be provided per VA requirements. Manual light switches will be installed to shut-off light fixtures.

iv. Egress lighting and exit signage will be provided as required.

Exit signs will be LED type.

Emergency lighting in generator and electrical spaces will be provided with 90 minutes battery pack.

h. Grounding System Requirements:

The new generator will be a separately derived system. Grounding and bonding system will be provided. A green insulated equipment ground copper conductor, sized per National Electrical Code 250.122, will be run with all feeders and branch circuit homeruns.

Attachments:

None.