.01 General

Service Entrance Electrical Room
1. A dedicated room shall be located on the perimeter of the building immediately adjacent to the pad-mount transformer.
2. All requirements for dedicated equipment space outlined in section 2. below shall apply to both main electrical rooms and satellite electrical rooms.
3. The electrical room shall have a physical separation from the other spaces in the building (including mechanical equipment rooms) with a minimum fire resistance rating of one hour (review code for stricter requirements).
4. Heating and ventilation of the main electrical room shall be dedicated to that room, and ventilation air shall not be transferred from adjacent spaces. Consider how air flow through the space will best cool any heat producing equipment.
5. Size to allow for future growth of the service entrance equipment of at least 25% of design requirements. There shall be adequate initial space and “future” space to allow the installation of additional sections equal in size to the switchgear required for this project.
6. If the service requires switchgear, it shall be located in the center of the room and shall allow for working clearance on ALL four sides of the equipment.
7. Provide card readers on all electrical room entry doors. Reader for new buildings shall be designed in accordance with the Electronic Security System Requirements outlined in the Access Control Specification of division 28. Readers for existing buildings shall be designed to conform with and tied into the existing system in the building.
8. All circuit breaker operating handles, disconnect handles, safety switch handles, push buttons, switches, etc. shall be mounted at an accessible height no higher than 6’-7” AFF.
Electrical Rooms and Dedicated Electrical Equipment Space
1. No foreign systems shall be permitted to penetrate or pass through electrical rooms.
  1. This includes but is not limited to any building system ductwork, building system piping (pressurized or unpressurized), any process piping, clean-outs, etc., and any penetrations of foreign systems.
  2. The aforementioned infrastructure shall not be permitted to be installed in the perimeter of any electrical room or dedicated electrical equipment space, regardless of installation height.
Sprinkler protection shall be permitted for the dedicated space where the piping complies with NEC 110.26 (F).
The design professional shall submit proposed equipment layouts and coordination plans for the electrical room(s) and/or space(s) to PSU Engineering Services Electrical Group during the schematic design phase and no later than DD phase.
1. Where electrical room HVAC ductwork and sprinkler piping are permitted within an electrical room to serve the needs of that room only, the installation(s) must comply with all NEC requirements. Furthermore, ductwork and piping shall not be routed above electrical equipment footprints, regardless of installation height.
  1. No exceptions, regardless of NEC allowance (i.e. 110.26 F.1.b), will be permitted in areas directly above the electrical equipment footprint.
Physical space in the electrical room is reserved for electrical equipment and pathways, both existing/new and future provisions. The design shall not minimize the potential for growth or expansion of the electrical distribution system nor necessitate technicians of other trades working within the space.
Service Voltage
1. At University Park, service shall be provided from the 12,470V distribution network whenever possible. The 4,160V network may be used where adequate capacity exists with approval of ES (Engineering Services).
2. At other locations, services may be provided by a local utility or the campus distribution network as appropriate. Details will be provided by Engineering Services.
3. Identify any medium voltage (600V and greater) raceway system within a building by painting it red in its entirety.
Building Voltages

For loads greater than 750kVA, consider 480Y/277V distribution with 208Y/120V step down transformers for receptacles and other 120V loads.
Step down transformers shall be located in rooms with adequate fire ratings and transformers connected for sound isolation using flexible conduit, isolation pads and when supported from the building steel, spring hangers.

Utility Demand and Consumption

The Design Professional shall complete the Utility Demand and Consumption form on all projects. It is used to inform the University of the impact on the distribution system capacity. Submit to Engineering Services at the Preliminary Design review submission and at the Final Design submission.
1. No electric welders, temporary or permanent, shall be allowed on electrical service.
2. No electric water heaters shall be permitted to be installed without prior written approval by Engineering Services Electrical Group.

Building or Facility Electrical Load Determination

The Design Professional shall complete the Electrical Load Determination form for all projects that involve new buildings, major renovations, new electrical services or electrical service upgrades. It is used to inform the University of the impact on the distribution system capacity and the building or facility's distribution system. Submit to Engineering Services Electrical Group at the Preliminary Design review submission and at the Final Design submission. Prepare a separate copy of the form for three types of power; Normal, Emergency and (if required) Standby power.

Minimum Requirements Prior to Energizing Electrical Service
1. Contractor shall submit all documentation for Electrical Acceptance Testing as outlined in project manual specifications and in compliance with PSU OPP Design and Construction Standards and Specifications. Additionally, contractor shall perform all requirements outlined in the “PSU Minimum Requirements Prior to Energization” .pdf document (see section 260500 web page), as applicable to scope of work. These requirements must be met, and documentation must be submitted to Engineering Services Electrical Group for signoff prior to electrical service being energized. If it is discovered that contractor fails to comply with these procedures, service will be disconnected until corrections are made.
Specification Editing

Generally, use the “listed manufacturers” option in lieu of “available manufacturers.” Confirm any manufacturer preference with Engineering Services.
Note at least 3 manufacturers, unless otherwise approved by Engineering Services. Publicly funded projects require equals unless a formal exception has been granted by the State.
Confirm Requirement for extra materials with Engineering Services. Typical items to provide are occupancy sensors, specialty luminaire lenses, fuses, indicating lamps, and enclosure keys.
First edit of specifications shall use "strike-through" instead of actually deleting items to be removed. This will allow Engineering Services Electrical Group to see what is to be deleted rather than search for what is missing.
Create an Excel spreadsheet list of spare parts, etc. that are to be turned over to PSU at substantial completion (based upon the final contract documents).
Data Sheet Instructions:
1. Engineer completes “SPEC DATA” column with information about equipment including but not limited to ratings, features and options. The data sheet is then submitted with completed specifications for bid.
2. Manufacturer completes “VENDOR DATA” column and returns completed data sheet with bid or submittal.
3. Engineer verifies that design specifications have been met by checking that specified features match submitted features.
4. Click here for Data Sheet Completion Instructions.

Mounting Heights

Heights are measured to device centerline, unless otherwise noted.
Mount switches, card readers, and similar devices at 44” AFF.
Mount receptacles and similar wiring devices at 18” AFF.

National Electric Code (NEC)

Any exceptions taken while using the latest edition of the NEC shall only be used with the express approval of Engineering Services.

.02 LEED

Refer to the draft PSU LEED v4 Guidance Document for our sustainable design philosophy.

.10 Scope (Basis of Design/Application of Systems)

Motors

Motors less than 1 hp. shall be single phase, 115 volts for operation on 120-volt circuits. Motors 1 hp. and larger shall be three phase. Motors operating on three phase, 208V shall be rated at 200V. Motors operating on three phase, 480V shall be rated at 460 volts.
1. Special consideration will be given to ECM motors and motors ≤ 5 hp
On motors 25 hp and above at 480V or 10 hp and above at 208V, discuss the use of soft start and variable speed drives. Voltage sag exceeding 3% on motor start is unacceptable. Download and edit the Variable Frequency Drive specification from Engineering Services.
Where reduced voltage starters of the wye-delta type are used, only closed transition types are acceptable.
Three phase motors rated 25Hp and larger, 480V AC or 208V AC shall utilize Variable Frequency Drive rated cable, as outlines in the Variable Frequency Drive specification and section 26 05 19.01.
Electric Motors operating on a VFD shall be provided with a bearing protection kit utilizing a high conductivity silver graphite brush and constant force holder system. This assembly shall position the silver graphite brush so that it is in constant contact with the motor shaft during operation.
1. For motors with a shaft diameter equal to or greater than 1-1/4”, use the Bearing Protection Kit, model no. BPK-4, by Helwig Carbon Products. For any other shaft sizes, select product based on manufacturer’s recommendations.

Elevator Service and Support Circuitry

Service:

Where required by code, service to elevator machine shall be derived from an alternate source of power, in addition to the normal source. Alternate sources of power, whether generator or dual-primary services, shall be reviewed with Engineering Services.

If standby supplies more than one (1) elevator, provide a selector switch so that only one (1) elevator can run simultaneously. This reduces yearly PSU testing requirements.

Alternate source transfer switch shall contain SPDT contacts for central control system and sufficient number of poles to switch phase wires. Refer to Tansfer Switch Requirements.
Provide combination fused disconnect/Shunt Trip operator unit. Equipment shall include three (3) Class J dual-element time delay fuses (sized appropriately for motor HP), 100VA CPT, 10 amp 120VAC Fire Safety Switch interface relay, key to test switch, green pilot light all mounted in a NEMA 1 enclosure. Unit shall be equal to the Bussmann "Elevator Power Module" PS series, Eaton "Elevator Control" ES series, Little Fuse LSP series, or Ferraz Shawmut ES series.

Where elevator machine service includes an alternate source transfer switch, the shunt trip circuit shall originate from a normal/ emergency circuit. Shunt trip normal / emergency circuit shall include a voltage-sensing, time delay on release (off) relay, field set for seven (7) second delay to off. Relay shall include NC contact for tie-in to fire alarm panel to annunciate “trouble”. Where tie-in to fire alarm system is not possible, provide a stand-alone fire alarm system with the control panel in the machine room.

Support Circuitry:

Cab lighting: Dedicated 20A Life Safety circuit shared only with emergency telephone consolidator. Fuse the cab lighting disconnect at 20A, slow-blow fuse. Each additional cab requires its own dedicated lighting circuit.
Emergency Phone Consolidator: Dedicated 20A Life Safety circuit shared only with elevator cab lighting. Direct the contractor to tap the line side of the cab lighting disconnet and provide a single red receptacle with red cover at the consolidator. Engrave the receptacle cover to read "FOR EMERGENCY PHONE USE ONLY". Request further emergency phone installation design requirements from Engineering Services.
Pit Sump Pump: Dedicated circuit and devices as required by load.
Pit lighting and GFI receptacle: Dedicated 20A normal circuit for GFI receptacle(s) and required lighting fixtures. Provide two (2) 3-lamp 48 inch shallow depth (4 inches or less) lensed T8 luminaires in the pit. Luminaires may be mounted horizontal. Provide 3-way switching for pit luminaires at the top and bottom of and within reach of, pit ladder. Mount all devices in the pit higher than 24 inches AFF.
Hoistway lighting: Dedicated 20A normal circuit for required lighting fixtures. Provide one (1) 2-lamp 48 inch shallow depth (4 inches or less) lensed T8 luminaires at each landing above the pit at a maximum distance of 10 feet center-to-center. Mount luminaires vertically in a corner. Provide separate 3-way switching for hoistway luminaires (in pit and top of shaft) and 4-way switches at each access point into the hoistway (elevator door). Mount switches 48" above landing floor level and within reach of access opening.
Machine Room lighting and GFI receptacle: Dedicated 20A circuit for GFI receptacle. Provide minimum of one (1) 3-lamp 48" luminaire on a switched standby power circuit. Connect lighting and related control on line side of GFI receptacle.
Provide two (2) emergency stop switches, one (1) at the entrance to the pit and one (1) at the bottom of the pit ladder in the pit. Switch shall be similar to Square D #SKR9R05H13, 2-position, maintained pull, mushroom head with "PUSH EMERGENCY" engraved on the unit. Connect switches to the elevator controller(s).
Illumination at each landing sill (lobby side) must be a minimum maintained level of 10 fc at all times. Source shall be unswitched, on emergency power.

Building Automation Systems (BAS)

Coordinate the monitoring of certain electrical equipment with the design of the BAS system. Equipment to be monitored shall include, but not be limited to:

Arc Flash Reduction Maintenance switches on service entrance equipment (when applicable). EC shall daisy-chain all switch outputs together so that if one is enabled the BAS system sends an alert to CCS.
Occupancy sensors with relay for HVAC setback for stand-alone room deployments, or digital lighting control systems integration with BAS via BACnet where deployed. All building-wide digital lighting control systems shall use BACnet interface and not contact closures via occupancy sensor. Discuss the deployment options with Engineering Services.
Exterior lighting circuits including building-mounted exterior luminaires. EC shall wire each CT to the BAS monitoring interface.
Engine Generators (when applicable). Refer to Generator section for points to wire to the BAS monitoring interface.
Automatic Transfer Switches. Refer to ATS section for points to wire to the BAS monitoring interface.
UPS's (when applicable).

Electrical Equipment BAS Monitoring Interface - Install BAS low voltage work separate from line voltage (>50VAC), specify that a BAS Interface box is provided. Box shall be minimum of 12x12 with clear cover and contain a labeled terminal strip for each piece of monitored electrical equipment. EC shall wire each point from the equipment to the terminal strip and label the wires at each end.
Provide a dedicated circuit or circuits to BAS equipment, from the appropriate branch of power. Not every piece of BAS equipment requires a 20A circuit, they may be combined when appropriate. Require that the EC field coordinate with the BAS vendor exact locations and provide a single receptacle for their UPS.

.20 Definitions

CCS: Central Control System that monitors all Building Automation Systems at University Park Campus.
Provision(s): Electrical space that is built for installation of future overcurrent device without the requirement of any additional parts.
Night Lighting: CCS term for exterior lights mounted to the building. These "Night" lights are usually controlled by the campus master photo cell. "Night Lighting does not include exterior lighting for walkways, roadway or parking, or egress lighting to the Public Way.
Site Lighting: CCS term for exterior lighting covering free standing walkway lights and "shoebox" roadway or parking lots. These "Site" lights are typically controlled by the camput master photo cell. "Site" Lighting does not include exterior lights mounted to the building or egress lighting to the Public Way.

.30 Submittals

Design Calculations
The University requires that the Design Professional submit calculations for all projects, including:

Illumination (Interior and Exterior) including copies of all proposed luminaires.
Short Circuit
Voltage Drop

Construction Submittals

Engineering Services has the right to request any submittal for review, but it is the sole responsibility of the Design Professional to approve or reject that submittal. Do not mark any item “Approved As Noted – Pending PSU Review” (or similar). Discuss any questions or concerns with Engineering Services Electrical Group prior to returning the document to the contractor.
Require all submitals in PDF format so that they may be shared electronically.
Provide a submittal schedule to ES and include ES on any transmittal of review comments.
Contact ES regarding which, if any, submittals should be transmitted for review. Again, this review shall be simultaneous to that of the Design Professional.

As-Built Submittals

Utilize the spreadsheet list of spare parts to be turned over to PSU at substantial completion. Require that the contractor provide documentation of each product turned over and note on spreadsheet when PSU received the materials and who accepted it.
Refer to the Lighting section for additional As-Built submittal requirements.

.40 Standard of Quality/Quality Assurance (reserved)

.50 Coordination (reserved)

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