Download division 16 - Colorado College

DIVISION 16 - ELECTRICAL
______________________________________________________________________
16000 - GENERAL COMMENTS
A.
Each drawing set should contain, at least, the following information:
1.
Symbols list.
2.
One line diagrams for all systems involved. (Show connected load at each
switchboard, panelboard, motor control center, etc.)
3.
Available fault current levels to be shown on power "one line diagram" at
each power panel, disconnect and motor control. A/C’s for new vs.
existing breakers (compatibility).
4.
Panelboard schedules with connected loads: See 16020-D.
Square D preferred manufacturer.
5.
Fixture schedules.
6.
Show home runs to panels, marked with circuit numbers.
7.
Show number of wires in conduit via "hash marks". (Wire sizes)
8.
Show location and identification of all telecommunication IDF's & MDF's.
(Owner will furnish information.)
9.
Show location, horsepower or amperage, voltage, phase, and NEMA (or
IEC if applicable) starter size for each motor.
10.
If combination starters or starters with fusible disconnects on line side of
starter, show size and class of current limiting rejection type fuses to be
installed. Allen-Bradley starters preferred manufacturer and Square D
disconnects preferred manufacturer.
11.
Show amperage, voltage and phase for special electrical loads.
12.
If coordination studies are required the documentation shall be provided to
the Owner by inclusion in the Maintenance and Operations Manual.
13.
Total connected KVA at each power panel, main distribution panel/switch
board and transformers.
14.
Show special systems, fire alarm, clock systems, intercom, etc.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.1
15.
If adding to existing systems, provide load analysis and consideration of
campus power capacity. Colorado Springs Utilities shall be consulted.
16.
For major equipment layout, type, voltages, manufacturers, location, etc.
should be reviewed with the Owner.
16010 - GENERAL PROVISIONS
A.
In general, all materials shall be inspected and approved and listed by
Underwriters Laboratories and bear UL label or UL recognized component label,
where labeling services for that type material are available.
B.
In general, voltage drops shall follow N.E.C. guidelines.
C.
The use of direct burial wire is discouraged.
D.
Conduit embedded in any poured concrete floors is discouraged.
"Slab on Grade" construction must be in sand fill 6" below slab.
E.
Each building automation system equipment location requires a dedicated 120
VAC - 20 amp circuit. (when possible)
F.
Do not use "shared" or "common" neutrals on any 208/120V or 480/277V
receptacle or lighting circuit. Install a neutral conductor for each phase wire.
G.
Do not use buried aluminum wire.
H.
Copper wire and conductors are preferred.
conductors shall be reviewed with the Owner.
Conduit under
Use an aluminum wiring and
16020 - ELECTRICAL EQUIPMENT DEFINITIONS
A.
Branch Panelboard - Fed from main switchboard or distribution panelboard and
feeds branch circuit loads such as lighting, receptacles and smaller motors.
B.
Dedicated Circuit - A branch circuit from the nearest available branch panelboard
which will serve only one load or group of loads of a sensitive type, (i.e.,
computers, word processors, etc.).
C.
Distribution Panelboard - Fed from main switchboard and feeds branch
panelboards, motor control centers, or major discrete loads.
D.
Integrated Equipment Short Circuit Ratings - The term "Integrated Equipment
Short Circuit Rating" refers to application of series connected circuit breakers in
combinations that allow some breakers to have lower individual interrupting
ratings than the available fault current. This is permitted when series
combinations have been tested and listed by AL.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.2
E.
Interrupting Rating - Maximum fault current, in RMS symmetrical amperes at
maximum listed voltage, that a device will interrupt (open) to clear a faulted
circuit.
F.
Isolation Transformer (Non-shielded!) - A transformer with primary and
secondary windings insulated from each other.
G.
Isolation Transformer (Shielded!) - Same as non-shielded except has electrostatic
shield between primary and secondary to attenuate noise.
H.
Isolated Ground Circuit - A dedicated circuit with an orange faced receptacle with
ground terminal NOT connected to building raceway system, but grounded by an
insulated green/yellow ground wire connected to "neutral-ground bonding point",
in main switchboard. Ground wire may serve more than one outlet, circuit, or
panel board, but connected only to loads requiring low noise ground (i.e.,
computers, word processors, instruments, etc.). Circuit breakers are to be marked
with orange dots.
I.
Main Switchboard - Switching, disconnecting, over current and metering
equipment rated 600 volts or less, which feeds distribution panels and/or branch
panel boards or motor control centers.
J.
Motor Control Center - A structure which groups and houses several "modular"
type motor controllers. It may also contain fusible disconnects or motor circuit
protectors.
K.
Noise Suppression – May be applied to any circuit and consists of radio frequency
chokes and/or capacitors to shunt high frequency noise to ground.
L.
Power Conditioning - May be applied to any circuit (usually to individual pieces
of equipment) and must be selected and sized for exact load it serves. A voltage
regulator or isolation transformer are types of power conditioning.
M.
Surge Suppression - May be applied to any circuit and consists of varistors and/or
similar type suppressors with a maximum clamping voltage of approximately
260VAC for 120VAC circuits. Devices are bi-directional. Suppression is applied
between all conductors. These devices protect against transient voltage spikes
and minor lightning strikes. (See Section 16670.)
N.
Uninterruptable Power Supply - Furnishes power to load even on complete loss of
building power. Will supply power for a limited time, to allow an orderly
shutdown of equipment without causing damage, or loss of data.
O.
Withstand Rating - Maximum fault current, at maximum rated voltage, in RMS
symmetrical amperes that a device can withstand (pass) during a fault and
function after fault is cleared.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.3
16030 - ELECTRIC POWER SYSTEM DESIGN
A.
B.
The campus uses Primary Metered service at 12470Y/7200 volts and Secondary
Metered Services.
1.
Buildings are served from the single primary metered circuit either
radially from the Cache La Poudre circuit underground to the facility, or
from the campus underground open loop. The loop circuit is fed from two
points on the same Cache La Poudre circuit.
2.
Transformer's secondary voltage is preferred to be 277/480 volt. Required
120/208 volt systems should be achieved through dry type step-down
transformers located adjacent to the 120/208 volt power panels.
3.
Buildings are also served with secondary metered services from traditional
utility provided underground primary service to utility provided service
transformers in 480Y/277 or 208Y/120 secondary voltages. Transformer
rated utility meters are generally provided.
The Owner and A/E will review building service power system requirements at
the preliminary design meeting.
16050 - BASIC ELECTRICAL MATERIALS AND METHODS
A.
Where electrical equipment is mounted on exterior walls below grade or other
damp locations, mount on standoffs.
B.
The use of box extension rings is discouraged. If required, only one is permitted
and all wires must extend at least 6" from front edge of extension ring.
C.
In general, the largest practical size device and junction boxes should be used to
provide space for the future. This is especially important for concealed boxes.
D.
Guidelines
1.
Minimum concealed device box depth = 2-1/8".
2.
Concealed square boxes with plaster rings are acceptable.
3.
Surface boxes with 1/2" raised covers are recommended.
16110 - RACEWAYS (General)
A.
½” minimum size.
B.
No indent fittings.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.4
C.
Branch circuits in conduit: Provide pull/junction boxes at 360° Maximum
equivalent bends, and/or 100’0” Maximum run.
D.
Feeders in conduit: Provide pull/junction boxes at 360 ° max. bends and/or where
length of pull exceeds pulling strength of conductors.
E.
Use of non-metallic “Liquidtite” is encouraged in place of metallic “Liquidtite” or
“Flex in sizes ½” through 2”.
F.
Provide “locator wire” buried with all non-metallic conduit or duct containing low
energy communication or fiber-optic circuits.
G.
Fittings: Provide insulated throat fittings or bushings, where necessary.
H.
Grounding type bushings recommended for services or feeders. Double locknuts
recommended on larger conduits, regardless of voltage involved.
I.
Approved thread lubricants recommended for rigid steel and aluminum conduits
to ensure better equipment grounding paths. Approved thread sealants
recommended for all underground (direct burial) threaded conduit joints.
J.
PVC conduit as a general raceway inside buildings is discouraged.
K.
Recommend all underground conduits be schedule 40 PVC with steel rigid
elbows where necessary for pulling.
L.
Buried steel raceways must be corrosion protected by use of PVC jacket, asphaltic
paint or half-capped taping.
16111 - METALLIC SURFACE RACEWAYS
A.
Owner's standard is "Wiremold" brand.
B.
Surface raceways used only where concealed wiring is impractical. When used,
field route for most inconspicuous location practical. Following are some
examples:
1.
Around baseboards.
2.
Corners of walls.
3.
Behind doors.
4.
Beside trim.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.5
C.
Minimum size raceway = 500 series.
D.
Contractors should provide a typical example of work for Owner's inspection.
Remainder of work to be of equal quality.
16114 - TELEPOWER POLES
A.
Owner's standard is "Wiremold" brand (Series 30TP-"X") or equivalent approved
by Owner. Use only if approved by Owner.
16120 - CONDUCTORS (Wire & Cable) (600V & below)
A.
All wire copper (exception: see Fire Alarm Section 16721).
B.
90° C. Minimum insulation rating.
C.
Type "THHN" preferred.
D.
Phase and neutral conductors A.W.G. 10 and smaller to have colored insulation.
Colored insulation in larger sizes, when available, is preferred. Conductors
A.W.G. 8 and larger may be "black" and marked with identifying 1/2" or 3/4"
tape bands, at each termination and at least every 12", for entire visible length of
conductor.
E.
All grounding conductors (isolated or equipment) to have green insulation in sizes
#18 through #2, conductors larger than #2 may be "black" with green or
green/yellow tape markers.
F.
Owner's standard wiring color code.
1.
All voltages and systems.
Equipment ground = green.
Isolated ground = green with yellow stripe or green with yellow tape
bands.
2.
208Y/120v, 3 Ph., 4 w. systems
Phase A = Black
Phase B = Red
Phase C = Blue
Neutral = White
3.
480Y/277v, 3 Ph., 4w. systems
Phase A = Brown
Phase B = Orange
Phase C = Yellow
Neutral = Gray
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.6
16131 - JUNCTION AND PULL BOXES
A.
Owner's standard color codes for junction boxes and covers.
Fire Alarm = Red with "FA" stenciled on cover
Emergency Power = Yellow
Telecommunications = Brown
Building Automation System = Blue
Sound Systems = Gold
Primary Distribution System = Gray
480/277 Volt = Orange
208/120 Volt System = White
16139 – MULTI-OUTLET ASSEMBLIES
A.
Owner's standard is "Wiremold" brand (Model 2000).
16140 - WIRE CONNECTIONS AND CONNECTING DEVICES
A.
No exothermic joints, unless specifically approved by the Owner.
B.
For #8 AWG or larger, compression or insulation piercing type connectors are
preferred.
C.
Motor connections #8 AWG or larger, shrinkable tubing is preferred.
D.
Use of "Split Bolt" connectors and tape is discouraged.
E.
Where a circuit passes through an outlet box and is tapped, all leads should be
pigtailed out to the wiring device, or by the “loop method” including the
equipment ground wire. This prevents loss of neutral or ground during
maintenance work. (See Appendix A - Sheet E-1)
16141 - WIRING DEVICES
A.
All devices to have pigtails or "clamp type" wire connections. Use of pressure
type connectors "Stakon" for connecting stranded wire to wiring devices shall be
used only after approval by Owner.
B.
Provide 120 volt convenience receptacles at each landing level in stairwells, and
in corridors, spaced not over 50 feet apart.
C.
See 3.16 subsection 16662 for GFCI Guidelines.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.7
D.
Owner’s standard receptacle configurations.
SYSTEM
PHASE
1
1
1
1
1
1
3
3
3
3
3
NOMINAL
VOLTAGE
120
120
208
208
208/120
208/120
208
208
408
208/120
480/277
NEMA
CONF.
5
L5
6
L6
14
L14
15
L15
L16
L21
L22
-20R
x
x
x
x
x
x
x
x
x
x
x
-30R
x
x
x
x
x
x
x
x
*x
x
*x
-50R
-60R
x
x
x
x
x
*Use only as necessary, due to poor availability.
**If 60A-480/277V or larger than 60A receptacles in any voltage are required, the
Owner's standard is "Russellstoll" pin and sleeve type connectors. Use only UL listed,
NEMA configurations.
E.
Only grounding type receptacles acceptable. No equipment enclosures grounded
by "grounded” neutral conductor. i.e., stoves or dryers.
F.
Must meet requirements of NEMA WD-1 and Federal Specification
W-S-596E.
Isolated ground receptacles may be used in any approved
configuration.
G.
The use of "Common" or "Shared" neutrals on 120VAC convenience receptacle
circuits is discouraged. See subsection 16690.
H.
Switches
I.
1.
Meet requirements of NEMA WD-2 and Federal Specification W-S-896E.
2.
Rated 20 Amp. at 277v. (minimum).
Mounting heights (Shall be shown on the drawings)
1.
Switches = +42 inch AFF. to device centerline.
2.
Wall receptacles = +18 inch AFF. to device centerline.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.8
16170 - DISCONNECTS
A.
Fusible types shall have rejection devices and current limiting fuses.
16195 - IDENTIFICATION (Guidelines)
A.
In general, the following items shall be equipped with nameplates:
1.
All motor starters, motor controls, motor control centers, push-button
stations, control panels and time switches.
2.
Disconnect switchboards, circuit breakers, contractors or relays in separate
enclosures. Power receptacles where the nominal voltage between any
contact is greater than 150V to ground.
3.
Special electrical systems shall be properly identified at junction and pull
boxes, terminal cabinets and equipment racks. (See Section 16131-A.)
4.
Nameplate inscription: Nameplate shall adequately describe the function
or use of the particular equipment involved. Nameplate for panelboards
and switchboards shall include the panel designation voltage and phase of
the supply, and where the circuit feeding panel originates, i.e.,
Panel A
480/277 V.
3 Phase - 4 W.
FED from "MDP"
B.
5.
When equipment has more than one source of power, i.e.: separate control
power source. The location of all power sources shall be CLEARLY
identified at the equipment location. i.e.: Nameplate on door, etc.
6.
Mark all wires in panelboards with the circuit number they serve. Legibly
mark feeder conduits entering and leaving a panelboard or switchboard
with their destination.
Materials - General
1.
Engraved Plastic Nameplates: Black letters on a white background with
self-adhesive back. Use on Switchboards, Panelboards, Motor Control
Centers. Etc.
2.
Adhesive Tape Labels: Black ¼” high imprinted letters on a clear tape as
made by a tape imprinting machine such as the Brother “P-Touch.” Use
on disconnect switches, motor starters, contractors, etc.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.9
3.
Directory Cards: Manufacturer’s standard pre-printed form under clear
plastic protective cover.
4.
Device Plate Engraving: Laser etching, when requested, nominal 1/8”
high lettering on plastic or nylon plates; black paint filled engraving on
metal plates; or 1/8” high lettering using adhesive tape (#2 above.)
16196 - FIRE STOP METHODS AND MATERIALS (Guidelines)
A.
Materials
1.
B.
C.
Intumescent material capable of expanding from 8 to 10 times when
exposed to temperatures of 250°F. It shall have an approved rating to
three hours per ASTME814 (U.L. 1479).
Preferred Products
1.
IPC - Flame Safe
2.
3M Caulk CP - 25
3.
Dow Corning
4.
Nelson Electric
Installation
1.
Where any conduit or cable penetrates floors or walls, seal the space
between conduits and/or cables and structural materials with approved fire
retardant material.
2.
For raceways and penetrations which must be reopened frequently (i.e.,
telephone raceways) for installation or removal of wires, use Nelson
Electric "FSP" fire stop putty, which remains permanently pliable for ease
of removal.
16420 - SERVICE ENTRANCES
A.
Normally underground services.
B.
Normal distribution is 480Y/277V or 208Y/120V. Where the source is a primary
metered circuit, Owner to provide and install all high voltage cables and those
between transformers and high voltage switch gear. Raceway and manholes,
boxes for cables are to be included in Contractor’s work. Contact Colorado
Springs Utilities and Colorado College Facilities Services for information.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.10
C.
Available fault level on the primary side - contact Owner's Utility Department.
D.
Low voltage distribution within buildings.
1.
480/277V for motors and large lighting loads.
2.
208/120V for general lighting and receptacle loads.
3.
Use of step up transformers, i.e. 208 to 480 volt is discouraged.
4.
Use of 240V equipment is discouraged.
E.
For building remodel projects in existing building, Architect/Engineer to verify
additional loads will not exceed existing transformers and/or main switchboards
capacities. If existing capacities are exceeded, include new transformers and/or
switchboards in design.
Coordinate work with Owner's Representative
Department.
F.
For major building addition projects where the additional electrical requirements
exceed the capacity of the existing transformers a totally new service shall be
installed. The new services shall have the capacity to support the total building.
The original building incoming service shall be removed so only one electrical
service remains.
16425 - SWITCHBOARDS (Main) (600V or less)
A.
To contain following instruments
Voltmeter & voltmeter switch
Ammeter & ammeter switch
B.
Provide 50% additional breaker "growth space" minimum.
C.
Copper Buss bars only.
D.
Series rated equipment must be properly identified.
E.
Acceptable Manufacturer: Square D, General Electric, Westinghouse or as
approved by Owner.
F.
Current transformers shall be wired to shorting type terminal blocks.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.11
16430 - METERING
A.
Owner's standard kilowatt hour/demand meter is to be provided on existing and
new facilities being served from the utility primary metered circuit.
B.
Equipment to be used is the E-MON D-MON PRO-MON model electronic meter
with split core sensors. Meter functions to be compatible with I-MON/CE-MON
Automatic Meter Reading System.
16450 - GROUNDING
A.
These guidelines for power handling circuits only.
1.
Install green insulated grounding conductor with feeder conductors to each
new panelboard.
2.
Install equipment ground conductor in same conduit with power
conductors from each motor control to motor.
3.
Install ground wire inside any piece of flex, regardless of type, size or
length.
4.
Install bonding jumpers around all concentric/eccentric knockout rings
that are not removed.
5.
Install equipment grounding conductor with all surface raceway systems.
Bond as follows:
a.
One or two piece raceway - bond at every box.
b.
Receptacles - bond each to box.
6.
Install equipment grounding conductor in rigid steel and EMT runs, 200'
and longer. Bond at each box or enclosure. (Not required in rigid
aluminum.)
7.
Grounding electrodes for existing building to include minimum grounding
field of two electrodes installed outside building envelope, bonded
together. Grounding field for new building to include two ground rods
interconnected with bare copper ground cable, and additional electrodes as
recognized by NEC.
8.
New grounding fields tested for resistance, report submitted to Owner's
Representative showing layout and measured values.
9.
Grounding electrode resistance = 5 Ohms maximum.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.12
16460 - TRANSFORMERS
A.
Building Distribution Type (DRY)
1.
Located in electrical equipment rooms. Ventilated, maximum 115 deg. C
rise, 220 deg. rise class C insulation system. Located in other than
electrical equipment rooms, 80 deg. rise, 220 deg. rise class C insulation
system.
2.
Where located outdoors, ventilated maximum 115 deg. rise, 220 rise class
C insulations system, and provided with standard weatherproofing baffles.
3.
Sound Ratings. Provide factory certified sound level test reports on
specific equipment furnished, when specifically requested by Owner.
Sound Rating: Maximum sound ratings are as follows:
KVA Sound
Rating Level
25 – 50 45 dB
51 – 150 47 dB
151 – 300 52 dB
301 – 500 57 dB
750 60 dB
4.
Consider over sizing or using “K” rated transformers when the load
consists significantly of computer equipment with switching type power
supplies.
16470 – PANELBOARDS
A.
In all locations other than College-owned residential houses (fraternities, small
dormitories) use panelboard construction with door in door cover construction
with key locks. Standard load center construction may be used in residential
houses..
B.
Panel boards to be provided with bolt-on breakers only. Miminum 10,000 A.I.C.
rated (240V); minimum 14,000 A.I.C. rated (277V).
C.
Provide equipment ground bar in all panels and load centers. Provide additional
insulated ground bar in panels serving sensitive equipment loads.
D.
Typewritten directory card with final room numbers. “Final” is defined as the
room numbers assigned by the Owner at completion of construction.
E.
Provide a minimum of 25% additional "spare" 20 amp. Single pole breakers 25%
additional "blank" spaces for future.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.13
F.
42 circuit panel, as minimum for normal situations.
1.
Avoid "multiple-tub" (i.e. more than 42 pole) branch panelboards.
Instead, provide additional feeder circuits and additional single panels.
This concept usually results in smaller feeder circuits and lower
interrupting capacity requirements at the panelboards. Locate each
panelboard near the center of its load for economical branch circuit
lengths.
G.
Tested and labeled per UL-67.
H.
Aluminum buss bars not acceptable.
I.
Acceptable Manufacturer: Square D is the required manufacturer. Alternates for
any project must be approved by Facilities Services prior to purchasing
equipment.
J.
Include statement for retorquing all connections after installation.
K.
Flush mounted panels to have: 7 Sq. In. of raceway area, minimizing to an
accessible J-box above lift-out ceilings or below access floors. J-box should be
sized as large as space permits for future conduit entries.
16477 - FUSES
A.
Fuses 600V. or less - Classes RK1, RK5, J or L are acceptable.
B.
Include spare fuses, Provide spare fuse cabinet.
16480 - MOTOR CONTROLS
A.
Tested and labeled under UL508.
B.
Combination starters and motor control centers to have "RK5" or "RK1" fuses
and rejection devices with fuses sized to act at a "back up" to overload heaters.
Motor short circuit protectors "MSCP" or circuit breakers are not acceptable.
C.
Provide phase loss, phase unbalance and phase reversal protection for these threephase motors:
D.
1.
All critical motors, regardless of size, i.e.; hydropic radiation pumps, etc.
2.
A115 horsepower and larger motors.
3.
Reduced voltage starting required for 10hp and above.
Use only "NEMA" type overload heaters (Class 20). Bimetallic "IEC" type
overload heaters are not acceptable. Electronic overload units may be employed.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.14
E.
Use only NEMA sized motors starting contractors.
F.
Motor control centers to have COPPER buss bars.
G.
Preferred Manufacturer: Square D, Allen Bradley, General Electric.
H.
Guidelines for motor control circuits :
1.
General:
a.
Preferred control voltage is 120VAC for all applications. (Low
voltage ac or do is acceptable but not desired.)
b.
All control circuits arranged so safeties and interlocks will shut
down equipment and require manual reset before restart.
c.
Momentary contact control circuits are preferred on all but small
motor applications.
This prevents uncontrolled restarts of
equipment, which could overload building electrical systems.
Exception: critical equipment, such as hydropic radiation pumps,
animal room air handling equipment and etc. Motors controlled by
building environmental control, use H.O.A. switches.
d.
Pilot lights: transformer, push to test type. Color: Red = "Run".
No "Stop" pilot required.
Generally, motors above 10 horsepower without variable speed
drives should have solid state reduced voltage starters, particularly
on belt drive equipment.
16483 - VARIABLE FREQUENCY DRIVES FOR FANS AND PUMPS
A.
General:
1.
All drive components shall be "burned in" as sub-assemblies and entire
drive tested, under load, before shipment. Full load endurance testing is
not considered a cost-effective option.
2.
Single motor drives are preferred over multi-motor drives.
3
Regenerative braking not required.
4
Current source drives not acceptable without Owner approval.
5.
Automatic restart after power outage feature, must be field selectable.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.15
B.
6.
Resonant Null" feature for voiding (jumping) specific speeds due to
critical frequency vibrations is not required. (We have not encountered
this problem in any centrifugal fan.)
7
Meet requirements of IEEE Standard 5191981 "Guide for Harmonic
Control and Reactive Compensation of Static Power Converters”.
Noise: Notch depth five percent or less and voltage distortion
three percent or less on line side of the drive.
b.
Audible noise from either the drive or the motor may be
objectionable and should receive careful consideration.
8.
If disconnect or transfer switches are used, an interlock switch shall be
installed to shut down the drive before the main switch poles open.
9.
Any manufacturer specified must have an established authorized
distributor and a service facility within the State of Colorado.
10.
Preferred Manufacturers: Toshiba/Houston, Graham, Allen-Bradley and
Robicon. Key pad programmable types with digital readouts are preferred:
Output Requirements:
1.
C.
a.
Use of 480-volt motors is preferred for all new and most existing
applications.
Performance Requirements:
1.
Capable of 110% rated current for one minute.
2.
Working frequency range = 6 to 60 Hz.
3.
Speed regulation = +/ - 1/2 % of maximum.
4.
Adjustable linear acceleration & deceleration. Range approximately. 1 to
60 seconds.
5.
Accept 4 - 20 Ma. (isolated and ungrounded) speed input signal.
6.
Accept Start/Stop (momentary contact) or maintained contact devices (120
vac. preferred.)
7.
Provide separate, form "C" contacts, rated 1 amp. (A 120 vac., to indicate
"inverter fault" & "drive run".
8.
Input power factor at least .95 throughout speed & load range.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.16
D.
Protection Requirements:
1.
2.
E.
Capable of enduring these faults, without permanent damage:
a.
Short circuit and/or ground fault at output terminals.
b.
Input overvoltage, undervoltage, phase loss or phase reversal.
c.
Energized into a coasting motor.
d.
Internal cooling fan failure.
Faults individually indicated, by visual means, and require reset, before
restart.
Service Facility:
1.
Must have factory authorized service facility within the State of Colorado.
16485 - CONTRACTORS
A.
Tested and listed under I3L508.
B.
Prefer mechanically held type, with clearing contacts.
16490 - TIME SWITCHES
A.
Electronic with battery back-up, seven day programmable.
B.
Contacts rated 277VAC.
16491 - AUTOMATIC TRANSFER SWITCHES
A.
Prefer "in-phase" retransfer feature, where electronic equipment is served.
B.
Prefer capability to test generator with or without transfer of load.
C.
Owner preference: ONAN.
16495 – ELECTRICAL GENERATORS - ONAN
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.17
16500 - LIGHTING
A.
Fluorescent type fixtures with electronic ballasts shall be used generally, fully
recessed with low surface brightness lens wherever possible. Four Foot long
fixtures are preferred. Indoor incandescent fixtures and outdoor lighting shall be
discussed with the Owner's Representative.
B.
Where high intensity discharge (HID) fixtures are appropriate, high-pressure
sodium or metal halide should be considered wherever possible. Mercury vapor
or low-pressure sodium is not preferred: advise and review with the Owner.
C.
Design fluorescent lighting with 32-watt lamps F32T8/TL835. (Owner's standard
lamps.)
D.
In Fixture schedule, indicate lamp type to installed in fixture.
E.
Exterior lighting controlled by individual photocells or solid state time clocks
when equipped with stand-by battery.
F.
The Illuminating Engineering Society (IES) Lighting Handbook shall be used as a
guide for all lighting levels.
1.
Auditorium, Large Classrooms, and Lecture Rooms shall have Lighting
Levels as follows (see Section 1.03 Classroom Design Criteria for more
information):
a.
50 footcandles for general lighting, fluorescent.
b.
30 footcandles for corridor lighting.
c.
Five footcandles, uniformly dimmable from 5 FC to 0.5 FC, for
note taking during media presentations when general lighting is
switched off. Use downright type fixtures for this purpose
wherever possible.
d.
Preferred design chalkboard lighting (fluorescent) for 75 FC,
maintained at horizontal center line of chalkboard, measured with
meter sensing element looking up. Switch for chalkboard lighting
to be separate from room lighting and located at front of room.
Switch fixtures, so if projector screen is in use, fixtures to the right
and/or left of projector screen may be turned “on” with fixture
behind screen turned “off”.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.18
G.
H.
In classroom where video recording takes place, consult with Colorado College
on the following items:
1.
Even illumination throughout the room
2.
Be careful of lamp reflection in monitor(s)
3.
Back light, on wall behind instructor
4.
Aiming of flood lights
5.
Location of light controls
Wall mounted lighting fixtures must meet or exceed ADA requirements.
16501- LAMPS
A.
All fixtures shall be provided with new lamps prior to acceptance by the Owner.
Except for special types, furnished by the Owner and installed by Contractor.
B.
Florescent lamp colors shall be reviewed with the Owner. Use ISU Central Stores
stocked lamps wherever possible.
C.
Suggested manufacturer of fluorescent lamps is Phillips. Obtain Owner approval
when making substitutions.
16502 - BALLASTS
A.
Electronic ballast (TED < 10%) with T8, 32-watt lamps is encouraged.
Suggested electronic ballast manufacturers
1.
Advance
2.
Magnetek
3.
Motorola
B.
Shop drawing for lighting fixtures shall include ballast manufacturers.
C.
Use of fluorescent type compact fluorescent lamps in new equipment is
encouraged.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.19
16530 - WALL MOUNTED LIGHTING
A.
Exterior wall mounted fixture shall have cutoff distribution Type D to prevent up
light spill.
16531- WALKWAY LIGHTING: REFERENCE APPENDIX ‘A’
A.
Contractor shall provide all concrete bases, conduit, wire and controls other than
photo cells furnished with fixtures and/or poles. Base design provided by
Architect.
B.
Owner will provide fixtures, poles, anchor bolts, and lamps. Contractor shall
receive, on site, and install fixtures and poles.
C.
Owner's standard fixture: Fixtures are identified in the Campus Master Plan.
Review the design with the Owner.
16532 - EMERGENCY/EXIT LIGHTING
A.
Exit signs: Shall be LED with green lettering on white background face.
1.
Artificially illuminated by led panels. (Not radioactive). Owner prefers
black stencil and red letters. (No plastic cases.)
B.
Individual battery pack emergency lighting, and exit signs, to be powered from
the unswitched portion of lighting circuit-feeding area served.
C.
Emergency generators, engine driven, natural gas powered, preferred over
individual preferred over individual battery pack equipment.
D.
No inverters are permitted.
16662 - GROUND FAULT PROTECTION (Personnel Protection) (5 milliamp)
A.
These convenience receptacles locations to have GFCI protection.
1.
All exterior, at least one on each building face.
2.
Within 6'0" of any type sink.
3.
In any wet location, i.e., wash down area for food processing, bathrooms,
swimming pools, fountains, spas, therapeutic pools, etc.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.20
B.
4.
In any garage or vehicle storage or maintenance area.
5.
On building roof, for maintenance purposes.
GFCI type receptacles are preferred over GFCI breakers, for convenience
receptacle outlets.
1.
Convenience receptacles fed through a GFCI receptacle must be in sight
of that GFCI receptacle. i.e., all receptacles on a single lab bench or along
the same wall.
16670 - LIGHTNING PROTECTION
A.
Major building projects should consider a grid type ground system, which
could be integrated into a future campus system. This shall be reviewed
with the Owner. Required for all buildings susceptible to lightning strikes,
i.e., not in another building's cone of protection, roof mounted antennas,
copper roof, overhead conductors, etc."
16690 - SENSITIVE ELECTRONIC EQUIPMENT
A.
Purpose:
1.
B.
Sensitive electronic equipment requires special considerations to avoid
power and operational problems.
Guidelines:
1.
Harmonics
a.
Most newer electronic or computer based equipment uses
technology which produces a high harmonic current content and
may lead to power system problems.
b.
The use of individual neutrals for each single-phase circuit and the
oversizing of any three phase neutral involved, needs engineering
consideration. The neutral to ground voltage drop should also be
considered.
c.
The use of K-rated transformers and harmonic traps needs to be
considered.
d.
If isolation transformers are employed, they should be the shielded
type.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.21
2.
3.
4.
Grounding
a.
An insulated green wire should be included with all feeders and
branch circuits. Bonding jumpers between receptacles and
raceway are desired.
b.
The use of isolated ground circuits/receptacles is not generally
necessary and if requested by occupants should be discussed with
the Owner.
c.
The grounding of each receptacle should be checked in the final
inspection.
Transient Voltage & Surge Suppression (TVSS)
a.
The use of TVSS receptacles on sensitive circuits is encouraged.
b.
Additional upstream TVSS device may be warranted in some
cases.
Power conditioning
a.
Power conditioners, voltage regulators and UPS units are not
generally required and, if requested by occupants, should be
discussed with Owner.
16721 - FIRE ALARM SYSTEMS
A.
Design Requirements – see technical information in Appendix D-5.
16730- CLOCK SYSTEMS
A.
There is no master clock system. Use 120V plugged in type. Battery-operated
clocks can be used only as limited installations.
16740 - TELECOMMUNICATION SYSTEM
A.
For telecommunication design requirements, contact Telecommunication
Department.
16770 - INSTRUCTIONAL SOUND AND PROJECTION SYSTEMS
A.
See Media Resources Department for requirements and details.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.22
16790 – EMPTY CONDUIT SYSTEMS
A.
Provide polypropylene pull rope in each conduit.
B.
Provide plastic plugs or covers, for all openings, to keep system clean.
16850 - ELECTRIC RESISTANCE HEATING
A.
Use electric heating only where no other means is available and in limited
application.
B.
Electric heating shall not be used for walkway snowmelt. Consult with Facilities
Services.
CC EDITION 10/04
DIVISION 16 – ELECTRICAL 16.23