Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

Executive Summary The electrical layout of The Virginia Historical Society Building’s new addition will be described in this evaluation of the planed design. This report analyzes the existing electrical system and calculates the NEC building design load using the available data and then compares the load to the actual sizes of this buildings electrical equipment. Since this building has not begun construction some detailed information on mechanical equipment and other parts of the system can not be acquired because they haven’t been purchased or haven’t been considered. Inserted throughout the report, riser diagrams and single line diagrams of the electrical distribution along with electrical equipment schedules show how the system operates and describes the available details on the electrical equipment. After the calculations were performed the new switchboard to supply the building was conformed to be sufficient to handle the power desired for the entire Virginia Historical Society Building . Information for this report was provided by Girard Engineering Spec sheets and the NEC 2002 handbook.

Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

System:

It is a typical radial system with a primary service entrance supplying the whole building. The old system supplying the existing building is a 2000A. Replacing this system is an underground 4000A, 480/270V, 3 phase, 4 wire, 60 hertz system which feeds the existing switchboard.

Power Distribution:

From the switchboard low voltage feeders distribute power to panel boards, transformers, and mechanical equipment. The 480/277 and 208/120 volt circuit breaker panelboards are on each floor. Mechanical Equipment and large motor loads operate at 480 volts. Fluorescent lighting operates at 277 volts. Incandescent lighting and receptacles operate at 120 volts. The main service switch gear is sized with 25% spare capacity for future growth.

Transformer Configuration:

The transformer that feeds the main distribution panel steps down the utility voltage to 480/277V. Transformers for general purpose use are Delta/Wye winding, self ventilated, and have a UL rating of 220˚C with the primary voltage at 480 volts and the secondary side at 208/120 volts.

Single Line Diagram

Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

Emergency Power System:

Emergency Lighting: The fire alarm system contains flashing signal lights near pull switches. The emergency exits signs are located throughout the building. Certain recessed fixtures are connected to an emergency circuit non-switch circuit. All emergency circuits have a minimum 10# AWG.

Onsite Emergency Generators: A 175KW, 480 V diesel generator

was installed in 1990. New addition requires a 300KW natural gas fueled generator which has the capacity for a boiler, boiler pump, and some of air handling units in addition to the emergency systems. This is needed for the museum because some of the art work and artifacts must be kept at proper temperatures. The new generator has a 350 A breaker and a 600 A breaker.

Automatic Transfer Switches: The switchboard is free standing, copper bus, and front accessible with NEMA 1 enclosure with utility company C/T section and emergency tap provisions where required. Main devices are bolted pressure switches. All branch devices are circuit breakers.

Fire Alarm System: The existing Simplex system will be extended into the new addition. This system will be a style D, fully electrically supervised, addressable, fire alarm system conforming to BOCA and ADA requirements.

Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

Overcurrent Protection Devices: All panelboards greater than 100 A have individual overcurrent protection. Fuses: The motor control center contains 80 A fuses

Fuse Switches: All disconnect switches are heavy-duty. According to code requirements, switches are either fusible or non-fusible.

Circuit Breakers: The trips in the existing switchboard range from

350A and 1200A. Locations:

Switchgear: The switchboard is located on the ground floor in the workshop (G80) which is part of the existing building.

Transformers: Four transformers are located on the ground floor

while the other two are located in the penthouse.

Panelboards: There are a total of 21 panelboards located within the addition. On each floor two 225A, 42P, panels are located in the electrical closets in the center of the addition. These are the general purpose transformers which are used for lighting, receptacles, or for the VAV system.

Motor Load Distribution Panels: The Motor Control Center is

located in the penthouse.

Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

Emergency Generator: The generator will be located on the roof in

a weather proof enclosure. Lighting System:

Standard office lighting contains 2x4 fluorescent air handling

fixtures with three T-8 lamps and electronic ballast. Downlights are compact fluorescent and incandescent PAR lamps. The Auditorium contains recessed down lights and wallwashers for the seating area and stage lighting all on a dimming system. Display lighting will contain track lighting and other specialty lighting for the gallery spaces. Lighting in all art storage contains fixtures with ultraviolet light shielding.

Power Factor Correction:

At this point in the design stage there are no intentions of placing any capacitors for power correction. I assumed there would be a power factor correction of .99.

Specific Building Design Requirements: The dimmer racks for the auditorium required an 112.5KVA transformer. In the gallery spaces and the museum storage rooms it is very important that the historical items are kept and maintained at regular temperatures. For this reason the emergency generator had to be sized large enough to deliver power to the air handling mechanical equipment.

Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

Riser Diagram

Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

Total Building Load The buildings capacity is configured to equal 15 watts/sqft. The building total area is 54,398 sqft. 54,398 x 15 = 815,970 total watts Total Lighting Load (From NEC 1999 Table 220-3(a) General Lighting Load by occupancy) 41944sqft. x 3.5VA/sqft. = 146804VA ( for Office Space) 12454sqft. x 1 = 12454 VA ( for Auditorium and 1st floor) Total = 159258 VA Receptacle Loads Ground Floor: 39 Receptacles x 180 VA = 7020 VA First Floor: 51 Receptacles x 180 VA = 9180 VA Second Floor: 127 Receptacles x 180 VA = 22860 VA Third Floor: 50 Receptacles x 180 VA = 9000 VA Fourth Floor: 14 Receptacles x 180 VA = 2520 VA Total Load = 22480 VA Load Used: First 10KVA at 100% = 10 KVA Remainder at 50% = 6.24 KVA Total Load Used = 16.24 KVA

Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

Lighting Table

Fixt Type Lamp Type Volts Watts Ballast

Ballast Factor

Power Factor Amps

F1 (2) F32T83500K 277 32 elect. 0.85 0.99 0.12

F2 (1) GE 80/PAR/HIR/FL25 120 80 none 0.85 0.99 0.67

F3 (3) F32T83500K 277 32 elect. 0.85 0.99 0.12 F4 (3) F32T83500K 277 32 elect. 0.85 0.99 0.12 F5 (3) F32T83500K 277 32 elect. 0.85 0.99 0.12 F6 (1) F40TT 277 40 elect. 0.85 0.99 0.14 F7 (2) 13W TT 3000K 277 13 elect. 0.85 0.99 0.05 F8 (2) F54THO3000K 277 54 elect. 0.85 0.99 0.19 F9 (1) 32W TRT 3000K 277 32 elect. 0.85 0.99 0.12 F10 (1) 250 PAR 38 WFL 120 38 none. 0.85 0.99 0.32 F11 120 none 0.85 0.99 0.00 F12 (1) F54THO 277 54 elect. 0.85 0.99 0.19 F13 (1) 75PAR30 120 75 none 0.85 0.99 0.63 F14 (2) 13W DTT 3000K 277 13 elect. 0.85 0.99 0.05 F15 (2) F32T83500K 277 32 elect. 0.85 0.99 0.12 F16 (1) 120 PAR 38 WFL 120 38 none 0.85 0.99 0.32 F17 (1) 120 PAR 38 WFL 120 38 none 0.85 0.99 0.32 F18 (1) 150W A21 120 150 elect. 0.85 0.99 1.25 F19 (1) F54THO3000K 277 54 elect. 0.85 0.99 0.19 F20 (1) 250W PAR 38 WFL 120 250 none 0.85 0.99 2.08 F21 (1) 120 PAR 38 WFL 120 120 none 0.85 0.99 1.00 F22 (2) F32 T8 TL/835 120 32 elect. 0.85 0.99 0.27 F23 (2) F32 T8 TL/836 120 32 elect. 0.85 0.99 0.27 F24 (1) 70W MHC 277 70 elect. 0.85 0.99 0.25 F25 (1) A19 60W 120 60 elect. 0.85 0.99 0.50 F26 (1) 250W PAR 38 120 250 none 0.85 0.99 2.08 F27 (1) 39W T5 277 39 elect. 0.85 0.99 0.14 F28 (1) CFQ 26W/G24q 277 26 elect. 0.85 0.99 0.09

Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

Mechanical Table

Equipment Voltage Phase Horsepower Current Power (VA)

P-1 Chilled Water - Plant Side 460 3 20 27 21512.06 P-2 Chilled Water - Plant Side 460 3 20 27 21512.06 P-3 Chilled Water - System Side 460 3 40 52 41430.64 P-4 Chilled Water - System Side 460 3 40 52 41430.64 P-5 Condenser Water 460 3 40 52 41430.64 P-6 Condenser Water 460 3 40 52 41430.64 P-7 Heating Hot Water - System Side 460 3 15 21 16731.60 P-8 Heating Hot Water - System Side 460 3 15 21 16731.60 P-9 Heating Hot Water - Boiler 1 115 1 0.75 6.4 1274.79 P-10 Heating Hot Water - Boiler 2 115 1 0.75 6.4 1274.79 P-11 Heating Hot Water - Boiler 3 115 1 0.75 6.4 1274.79 P-12 Heating Hot Water - Boiler 4 115 1 0.75 6.4 1274.79 02-F-1 Outside Air Fan 115 1 0.75 6.4 1274.79 02-F-2 Basement Addition 115 1 0.17 4.4 876.42 02-F-3 Ground Floor Workshop Exhaust 115 1 0.50 4.4 876.42 02-F-4 Ground Level Toilet Exhaust 115 1 0.50 4.4 876.42 02-F-5 Second Level Toilet Exhaust 115 1 0.125 4.4 876.42 02-F-6 Third Floor Toilet Exhaust 115 1 FRAC 4.4 876.42 02-F-7 Refrigerant Purge Exhaust 115 1 0.75 6.4 1274.79 02-AHU-1 Chilled Water AHU 460 3 40 52 41430.64 02-AHU-2 Chilled Water AHU 460 3 15 21 16731.60 Total = 312402.93

Equipment Voltage Phase

Power (KW)

Power (VA)

02-WH-1 Electrical Heater 277 1 2 2000 02-WH-2 Electrical Heater 277 1 2 2000 02-WH-3 Electrical Heater 277 1 2 2000 02-CUH-1 Electrical Heater 480 3 6 3464.10 02-CUH-2 Electrical Heater 480 3 10.5 6062.18 02-CUH-3 Electrical Heater 480 3 7.5 4330.13 02-UH-1 Electrical Heater 480 3 5 2886.75 02-UH-2 Electrical Heater 480 3 5 2886.75 02-CH-1 Electrical Heater 277 1 2 1154.70 02-CH-2 Electrical Heater 277 1 2 1154.70 CT-1 Cooling Tower 460 3 16 9237.61 CT-2 Cooling Tower 460 3 16 9237.61 02-H-1 Humidifier 480 3 75 43301.29 Total = 89715.83

Brian Regan Lighting/Electrical Option Virginia Historical Building, Richmond, Virginia Primary Faculty Consultant: Mistrick

Total Mechanical Load 312402.93 + 89715.83 = 402118.76 VA Total Building Load Lighting Load = 159.26 KVA Receptacle Load = 16.24 KVA Mechanical Load = 402.12 KVA Total Load = 577.63 KVA Building Design Load Total load / .75 Design Factor = 770.17 KVA The old switchboard was 2000A. The new main switchboard is a 4000A, but this will serve the total building. To determine if the switchboard is sized properly the additional 2000 A is compared to the total design load which happens to be efficient to cover the total design load.