Electrical System After re-designing the lighting system for the children s computer, circulation and storytelling areas, the electrical system had to be redesigned as well. These are the new panel board schedules. All lighting fixtures were placed on the same schedules based on area and floor level: panelboard L1 for the interior first floor and exterior, and panelboard L2 for the interior second floor. (N) PANELBOARD "L1" VOLTAGE: 208/120 A, 3P :MAIN C/B PHASE: 3 A :BUSSING WIRE: 4 :MOUNTING LOAD A B C BKR ckt abc ckt BKR A B C LOAD LIGHTS - 101-102 1.2 20A-1P 1 2 20A-1P 0.8 LIGHTS - 113 LIGHTS - 103-110 1.0 20A-1P 3 4 20A-1P 0.9 LIGHTS - 113 SPARE 0.0 20A-1P 5 6 20A-1P 1.0 LIGHTS - 113 EXTERIOR LIGHTS 0.0 20A-1P 7 8 20A-1P 0.7 EXTERIOR LIGHTS LTG CTRL PNL LCP1 1.0 20A-1P 9 10 20A-1P 0.5 EXTERIOR LIGHTS SPARE 0.0 20A-1P 11 12 20A-1P 1.0 EXTERIOR LIGHTS - CAR MOTION SPARE 0.0 20A-1P 13 14 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 15 16 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 17 18 20A-1P 0.0 SPARE SPACE 0.0 20A-1P 19 20 20A-1P SPACE 0.0 20A-1P 21 22 20A-1P SPACE 0.0 20A-1P 23 24 20A-1P SPACE 0.0 20A-1P 25 26 20A-1P SPACE 0.0 20A-1P 27 28 20A-1P SPACE 0.0 20A-1P 29 30 20A-1P SPACE 0.0 20A-1P 31 32 20A-1P SPACE 0.0 20A-1P 33 34 20A-1P SPACE 0.0 20A-1P 35 36 20A-1P
SPACE 0.0 20A-1P 37 38 20A-1P SPACE 0.0 20A-1P 39 40 20A-1P SPACE 0.0 20A-1P 41 42 20A-1P 1.2 2.0 0.0 1.5 1.4 2.0 KVA PHASE A: 2.7 28.11 :TOTAL LOAD AMPERES KVA PHASE B: 3. 4 (10.125 X 1000)/(1.732 X 208) = 28.11 KVA PHASE C: 2. 0 Connected D.F Demand KVA LIGHTING TOTAL K VA: 8. 1 1.25 10.125 RECEPTACLE KVA: 0 1.0 0 TOT AL: 8.1 10. 125 (N) PANELBOARD "L2" VOLTAGE: 208/120 225A, 3P :MAIN C/B PHASE: 3 225A :BUSSING WIRE: 4 SURFACE :MOUNTING LOAD A B C BKR ckt abc ckt BKR A B C LOAD LIGHTS - 206-209 0.9 20A-1P 1 2 20A-1P 0.8 LIGHTS - 211,226-227 LIGHTS - 209 0.4 20A-1P 3 4 20A-1P 0.7 LIGHTS - 211,226-227 LIGHTS - 212 1.1 20A-1P 5 6 20A-1P 0.7 LIGHTS - 211,226-227 LIGHTS - 212 1.0 20A-1P 7 8 20A-1P 1.0 LIGHTS - 227 LIGHTS - 214-217 1.1 20A-1P 9 10 20A-1P 0.8 LIGHTS - 227 LIGHTS - 214-217 1.1 20A-1P 11 12 20A-1P 0.7 LIGHTS - 227 LIGHTS - 213-213A 0.7 20A-1P 13 14 20A-1P 0.6 LIGHTS - 222 LIGHTS - controls 1.1 20A-1P 15 16 20A-1P 0.6 LIGHTS - 222 LIGHTS - 228-229,231 0.9 20A-1P 17 18 20A-1P 1.2 LIGHTS - 223,225,230 LIGHTS - 219,221,235-236 0.8 20A-1P 19 20 20A-1P 1.0 LIGHTS - 100,200
LIGHTS - 202,204-205,237-238 0.8 20A-1P 21 22 20A-1P 1.0 LTG CTRL PNL LCP2 LIGHTS - 233 0.8 20A-1P 23 24 20A-1P 0.6 DAYLTG. DIM.CTRL LIGHTS - 232 0.8 20A-1P 25 26 20A-1P 0.6 DAYLTG. DIM.CTRL LIGHTS - 201,234 0.4 20A-1P 27 28 20A-1P 0.6 DAYLTG. DIM.CTRL LIGHTS - 233 0.2 20A-1P 29 30 20A-1P 0.6 DAYLTG. ON/OFF DIM.CTRL SPARE 0.0 20A-1P 31 32 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 33 34 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 35 36 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 37 38 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 39 40 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 41 42 20A-1P 0.0 SPARE 4.2 3.8 4.1 4.0 3.7 3.8 KVA PHASE A: 8.2 78.42 :TOTAL LOAD AMPERES KVA PHASE B: 7.5 (28.25 X 1000)/(1.732 X 208) = 78.42 KVA PHASE C: 7.9 Connected D.F. Demand KVA TOTAL LIGHTING KVA: 23.6 1.25 28.25 RECEPTACLE KVA: 0 1.0 0 TOTAL KVA: 23.6 28.25 (N) PANELBOARD R1" VOLTAGE: 208/120 225A, 3P :MAIN C/B PHASE: 3 225A :BUSSING WIRE: 4 SURFACE :MOUNTING LOAD A B C BKR ckt abc ckt BKR A B C LOAD REC 101 0.8 20A-1P 1 2 20A-1P 0.7 EF-4 REC 101 0.8 20A-1P 3 4 20A-1P 1.8 ELEVATOR CONTROLLER
REC 101 0.8 20A-1P 5 6 20A-1P 0.3 FIRE DOOR - ELEVATOR REC 101 0.8 20A-1P 7 8 20A-1P 0.3 FIRE DOOR - LOBBY REC 102,103 0.8 20A-1P 9 10 20A-1P 1.2 GARAGE DOOR TELECOM EQUIPMENT 1.8 20A-1P 11 12 20A-1P 1.8 SLIDING DOOR REC 100,104 1.0 20A-1P 13 14 20A-1P 1.0 WATER FOUNTAIN REC 101 0.8 20A-1P 15 16 20A-1P 0.2 DUCT SMOKE DETECTORS TELECOM EQUIPMENT 1.8 20A-1P 17 18 20A-1P 0.2 FA CONTROL PANEL REC 106 1.8 20A-1P 19 20 20A-1P 0.2 FA POWER SUPPLY MOTORIZED SCREEN 1.0 20A-1P 21 22 20A-1P 0.0 SPARE REC 109 0.4 20A-1P 23 24 20A-1P 0.0 SPARE SPARE 0 20A-1P 25 26 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 27 28 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 29 30 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 31 32 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 33 34 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 35 36 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 37 38 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 39 40 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 41 42 20A-1P 0.0 SPARE 4.4 3.4 4.8 2.2 3.2 2.3 KVA PHASE A: 6.6 56.35 :TOTAL LOAD AMPERES KVA PHASE B: 6.6 (20.3 X 1000)/(1.732 X 208) = 56.35 KVA PHASE C: 7.1 Connected D.F. Demand KVA TOTAL LIGHTING KVA: 0 1.25 0 RECEPTACLE KVA: 11.6 1.0 11.6 REMAINING KVA: 8.7 1.0 8.7 TOTAL KVA: 20.3 20.3
(E) PANELBOARD R2" VOLTAGE: 208/120 225A, 3P :MAIN C/B PHASE: 3 225A :BUSSING WIRE: 4 SURFACE :MOUNTING LOAD A B C BKR ckt abc ckt BKR A B C LOAD REC 200, 206 0.8 20A-1P 1 2 20A-1P 0.8 REC 215 WATER COOLER 1.8 20A-1P 3 4 20A-1P 0.8 REC 215, 219, 221 HAND DRYER 205 1.8 20A-1P 5 6 20A-1P 0.8 REC 222 HAND DRYER 204 1.8 20A-1P 7 8 20A-1P 1.0 HAND DRYER 221 REC 204, 205, 237, 238 0.8 20A-1P 9 10 20A-1P 0.8 REC 222 REC 234, 235 0.8 20A-1P 11 12 20A-1P 0.8 REC 222 REC 235 0.8 20A-1P 13 14 20A-1P 0.8 REC 211 REFRIGERATOR 1.0 20A-1P 15 16 20A-1P 0.8 VENDING REC 230 1.0 20A-1P 17 18 20A-1P 1.0 VENDING REC 231, 228 1.0 20A-1P 19 20 20A-1P 1.0 REC 223 COPIER 1.0 20A-1P 21 22 20A-1P 0.8 REC 223 REC 232, 233 0.6 20A-1P 23 24 20A-1P 0.8 REC 229 REC 233 0.8 20A-1P 25 26 20A-1P 1.0 REC 225 REC 233 0.8 20A-1P 27 28 20A-1P 0.8 REC 225 REC 233 1.2 20A-1P 29 30 20A-1P 0.8 REC 225 REC 233 0.6 20A-1P 31 32 20A-1P 0.8 REC 225 REC 210 0.8 20A-1P 33 34 20A-1P 1.0 REC 225 REC 213 0.8 20A-1P 35 36 20A-1P 1.2 REC 226 REC 213, 214 0.8 20A-1P 37 38 20A-1P 1.0 REC 226 REC 214, 215 0.8 20A-1P 39 40 20A-1P 1.2 REC 227 REC 215 0.4 20A-1P 41 42 20A-1P 0.0 SPARE 6.6 7.0 6.6 6.4 6.2 5.4
KVA PHASE A: 13.0 9.4 106.04 :TOTAL LOAD AMPERES KVA PHASE B: 13.2 15.2 (38.2X 1000)/(1.732 X 208) = 106.04 KVA PHASE C: 12.0 Connected D.F. Demand KVA TOTAL LIGHTING KVA: 0 1.25 0 RECEPTACLE KVA: 24.6 1.0 24.6 REMAINING KVA: 13.6 1.0 13.6 TOTAL KVA: 38.2 38.2 (E) PANELBOARD R2" VOLTAGE: 208/120 MLO :MAIN C/B PHASE: 3 225A :BUSSING WIRE: 4 SURFACE :MOUNTING LOAD A B C BKR ckt abc ckt BKR A B C LOAD REC 211 0.6 20A-1P 43 44 20A-1P 0.2 DUCT DETECTOR EXPRESS CHECK 0.6 20A-1P 45 46 20A-1P 0.4 PLMBNG SENSOR 204,205,237,238 THEFT CHECK DETECTION 0.7 20A-1P 47 48 20A-1P 1.0 MICROWAVE PROJECTOR 1.0 20A-1P 49 50 20A-1P 0.0 SPARE MOTOR SCREEN 1.0 20A-1P 51 52 20A-1P 0.0 SPARE REC ROOF 0.8 20A-1P 53 54 20A-1P 0.0 SPARE REC 202 1.0 20A-1P 55 56 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 57 58 20A-1P 0.0 SPARE SPARE 0.0 20A-1P 59 60 20A-1P 0.0 SPARE SPACE 0.0 20A-1P 61 62 20A-1P 0.0 SPACE SPACE 0.0 20A-1P 63 64 20A-1P 0.0 SPACE SPACE 0.0 20A-1P 65 66 20A-1P 0.0 SPACE SPACE 0.0 20A-1P 67 68 20A-1P 0.0 SPACE SPACE 0.0 20A-1P 69 70 20A-1P 0.0 SPACE
SPACE 0.0 20A-1P 71 72 20A-1P 0.0 SPACE SPACE 0.0 20A-1P 73 74 20A-1P 0.0 SPACE SPACE 0.0 20A-1P 75 76 20A-1P 0.0 SPACE SPACE 0.0 20A-1P 77 78 20A-1P 0.0 SPACE SPACE 0.0 20A-1P 79 80 20A-1P 0.0 SPACE SPACE 0.0 20A-1P 81 82 20A-1P 0.0 SPACE SPACE 0.0 20A-1P 83 84 20A-1P 0.0 SPACE 2.6 1.6 1.5 0.2 0.4 1.0 KVA PHASE A: 2.8 106.04 :TOTAL LOAD AMPERES KVA PHASE B: 2.0 (38.2X 1000)/(1.732 X 208) = 106.04 KVA PHASE C: 2.5 Connected D.F. Demand KVA D.F. Demand kva LIGHTING KVA: 0 1.25 0 TOTAL LTG kva: 0 1.25 0 RECEPTACLE KVA: 2.4 1.0 2.4 TOTAL RECEPTACLE kva: 27 1.0 27 REMAINING KVA: 4.9 1.0 4.9 REMAINING kva: 18.5 1.0 18.5 Ckts 43-84 TOTAL KVA: 7.3 7.3 TOTAL Kva: 45.5 45.5 The first floor receptacle/control panel is remaining basically the same since there were no changes added to the first floor of the library.
Incoming service 3 UTILITY TRANSFORMER 2 SWITCHBOARD 1000 AMPS, 120/208 VOLTS, 3PHASE, 4 WIRE PROVIDE SHUNT TRIP CIRCUIT BREAKER FOR ELEVATOR M 225 AMPS 225 AMPS 225 AMPS 400 AMPS 3POLE 3POLE 3POLE 225 AMPS 3POLE 3POLE 220 AMPS 3POLE 1 1 1 1 1 GROUNDING ROD PNL R1 225 AMPS PNL R2 225 AMPS PNL L1 225 AMPS PNL L2 225 AMPS PNL M1 400 AMPS
The Lighting Load and Receptacle Loads were calculated using NEC Article 220. These are considered continuous loads and therefore the computed load for the feeder must be based on 125% of the continuous load. For the feeder taps to each panel: Panel L1 (lighting) Actual Load (kva) D.F. New Load (kva) add 20% spares Final Load (kva) General Lighting Load 7.10 1.25 8.88 1.78 10.65 Rcptcl. First 10 kva: 0.00 1.00 0.00 0.00 0.00 Total Load: 8.10 8.88 1.78 9.72 Final Total Load (kva): conclusion 9.72 There is a difference of 2.3 kva in this panelboard. The change in VA is negligible and neither the breaker nor panelboard need to be resized. Panel L2 (lighting) Actual Load (kva) D.F. New Load (kva) add 20% spares Final Load (kva) General Lighting Load 23.60 1.25 29.50 0.20 35.10 Rcptcl. First 10 kva: 0.00 1.00 0.00 0.20 0.00 Total Load: 23.60 29.50 35.40 Final Total Load (kva): 35.40 conclusion There is a difference of 1.5 kva in this panelboard. The change in VA is neglible and neither the breaker nor panelboard need to be resized. Panel R1 (receptacles) Actual Load (kva) D.F. New Load (kva) add 20% spares Final Load (kva) Other Loads 8.70 1.00 8.70 0.20 10.44 Rcptcl. First 10 kva: 11.60 1.00 11.60 0.20 13.92 Total Load: 23.60 20.30 24.36
Final Total Load (kva): 24.36 Panel R2 (receptacles) Actual Load (kva) D.F. New Load (kva) add 20% spares Final Load (kva) Other Loads 13.60 1.00 13.60 0.20 16.32 Rcptcl. First 10 kva: 11.60 1.00 11.60 0.20 13.92 Total Load: 25.20 25.20 30.24 Final Total Load (kva): 30.24 For the feeder taps to each panel: L1 General Lighting Load: 17,244 sqft at 1.2 VA/sqft = 20692.8 VA Receptacle Load: 17,244 sqft at 0.5 VA/sqft = 8622.0 VA Net computed load using demand factors from Table 12.2: 29314.8 VA at 100% = 29314.8 VA Since it is a 208/120 V service: Minimum Ampacity = 29314.8/(1.732 x 208) = 81.37 A L2 General Lighting Load: 15,984 sqft at 1.2 VA/sqft = 19180.8 VA Receptacle Load: 15,984 sqft at 0.5 VA/sqft = 7992.0 VA Net computed load using demand factors from Table 12.2: 27172.8.0 VA at 100% = 27172.8.0 VA Since it is a 208/120 V service: Minimum Ampacity = 27172.8.0 /(1.732 x 208) = 75.43 A For the main feeder: Total computed load for six panels = 8.1 + 23.6 + 20.3 + 38.2 + 7.3 + 103.3 = 200.8 kva
The Rosegarden Library, with its location in San Jose, California has its power supplied from PG&E. The connection is located in the exterior of north side of the building and the transformer is located in the Electrical Equipment room on the ground level. Refer to riser diagram above. New Conduit Schedule Tag Quantity Conduit (IN) Use Remarks 1 1 2 1/2 (4)#4/0+(1)#4G 2 3 5 PG&E to install conductors 3 2 4 PG&E to install conductors Voltage drop calculations To determine voltage drops, table 11.5 in S. David Hughes, Electrical Systems in Buildings was used. Using 800 VA per common receptacle unit. Use 120V Panelboards X = length in ft. System Type The Rosegarden Library has a radial circuit arrangement. This building is composed of a main switchboard that branches out to the five control panels in the building. This system is the simplest of the circuit arrangements since there is only one primary feeder and one transformer through which the associated secondary bus is served. In order to leave it as simple as possible in order to avoid confusion with the maintenance and electricians, this system will be left the same. Utilization Voltage The Utilization voltage of this building is 208/120 V and it is used on both levels. Transformer Configuration Rosegarden Library uses Nema 3R, UON Transformer in exterior of building with a copper clad grounding rod. This is one of the best and most expensive kinds of system available. It is located on the northeast side of the building. This transformer is provided
by PG&E, and they don t give us the rating. When you ask for a certain rating, they usually give you less. So it will probably be according to one of the electrical engineers working on the project, and since it is a relatively small building a 300 kva transformer (830 Amps) will probably be provided. The secondary voltage is 120/208V, 3 phase. The library does not have much control over this, since it is owned by the city of San Jose. It is a public building. Emergency Power System The emergency power system will not have automatic transfer switches since there is no emergency generator. There is a UPS in the telecom room though, which the library is providing for battery backup for the server. Emergency light fixtures have emergency ballasts incorporated, so there would be enough light in case of an emergency, for about 90 min. for most of them. These are all operated mainly in 120V. In addition, a shunt trip circuit breaker is provided for the elevator. Over Current Protective Devices There is an over current protection device which is a 1000 A, 3 phase circuit breaker. There is also a transformer assembly with two 40 VA transformers with separate secondaries in the relay panels. Transformers include internal over current protection with automatic reset and metal oxide varistor protection against power line spikes. 120 or 277 VAC as required, 60 Hz +/- 10%. Location of switchgears, panelboards and motor centers The main switchboard is located in the Electrical Equipment room (room 108 on the first floor). there are no switchboards in Rosegarden since they hold loads between 2000 5000 amps, and are more expensive. Switchboards are used in this building since we only need front access to it and since it is not that big, we just need it to hold 800-2000 (but could go up to 5000) amps. The mechanical equipment table will remain the same since no mechanical gear was changed. Mechanical Equipment Table Mech Eq Type Service Voltage Phase Hz Full Load Amps ACU 1 Natural gas HTG Library central area 208 3 60 66 Electrical CLG Package Unit ACU 2 Natural gas HTG Library North 208 3 60 73 Electrical CLG Package Unit Exposures ACU 3 Natural gas HTG Library South 208 3 60 86
ACU 4 Electrical CLG Package Unit Natural gas HTG Electrical CLG Package Unit Exposures Library 1 st floor community room 208 3 60 23 Typical lighting system All the lighting systems in the building operate on 208/120V. The most common light fixtures in this library are the fluorescent light fixtures, either linear florescent or compact fluorescent. These lamps were chosen for their low power consumption and easy maintenance and repair. All the ballasts in the light fixtures have a high power factor, CBM certified and bear the UL label. The electronic ballasts need to be high power factor, high frequency and suitable for lamps specified. The library has a Smartwire relay lighting control system as well as DMX controls, in order to allow for color changing in the LED s. Fixture Lamps - total Input Volts Description Mounting Code Watts A 1-42 120 5 Diameter, compact fluorescent downlight. Recessed C 1-5.5 120 12 color LED Surface T (2x40,2x36) 120 Direct/Indirect fluorescent pendant fixture. Pendant 232 AA 1-70 120 Metal Halide wall mounted fixture. Surface W 1-34 120 Compact fluorescent wallwasher recessed AD 1-100 120 Metal Halide Wall mounted fixture. Surface AJ 1-70 120 Metal Halide Bollard Ballard The new lighting design loads have been placed on a 208v panelboard which would be fed from the panelboard. Since the loads have been reduced on the switchboard, it is going to be left as is. On the four spaces analyzed, there were not enough new fluorescent lighting to fill up a decent sized panelboard. The panel is going to be left unsized due to the fact that that only a portion of the total load can be applied to the panelboard without a full building analysis.
Mechanical Equipment Table Mech Eq Type Service Voltage Phase Hz Power factor Full Load Amps ACU 1 Natural gas HTG Electrical CLG Package Unit Library central area 208 3 60 0.9 66 ACU 2 ACU 3 ACU 4 EF1 EF2 EF3 EF4 GD1 EV1 Natural gas HTG Electrical CLG Package Unit Natural gas HTG Electrical CLG Package Unit Natural gas HTG Electrical CLG Package Unit Centrifugal exhauster Centrifugal exhauster Centrifugal exhauster Centrifugal exhauster Library North Exposures Library South Exposures Library 1 st floor community room Men/women restrooms Men/women restrooms Men/women restrooms & public/staff Men/women restrooms & public/staff Parking Garage Elevator equip room 208 208 208 3 60 0.9 73 3 60 0.9 86 3 60 0.9 23 120 1 60.9 5.8 120 1 60.9 5.8 120 1 60.9 9.8 120 1 60.9 5.8 120 1 60.9 9.8 208 1 60.9
Utility The local utility used to distribute power to the building is Pacific Gas & Electric. PG&E will provide all the electricity for Rosegarden. Controls The controls used in this building were mostly DMX and iplayer 2.0 for the colored cove lights. This control along with the light system manager software, should provide enough and easy information in order for the library caretakers to program different views or environments in the children s area of the library. These controls will allow for color changing through time. There will be various programmed scenes which will run through the day creating vibrant colors which will energize the space.