CITY OF SPARKS TRAFFIC SIGNAL EQUIPMENT
The City of Sparks traffic signal equipment shall be installed in accordance with national
standards and codes including, but not limited to, the most current edition of The Manual on
Uniform Traffic Control Devices (MUTCD), the National Fire Protection Association
(NFPA), the National Electrical Code (NEC), etc. In addition, the following standards shall,
to the best possible ability of the contractor, be met. Any conflicts between the national
standards and codes and the City standards shall be resolved by contacting the City
Transportation Manager for a ruling.
Safety Lighting All cobra style luminaires to be of the cutoff style. All LED style
lighting fixtures shall be CREE STR-LWY-4M-HT-08-E-UL-SV-700-40K or approved
equal. All LED style lighting fixtures shall meet the following minimum criteria regardless of
manufacturer:
1.
2.
3.
4.
5.
The housing shall be all metal with the exception of the lens.
There shall be a minimum 5 year warranty.
Each complete and assembled fixture shall require no more than 190 System Watts.
The fixture shall be Illuminating Engineering Society of North America (IESNA)
LM-79-08 compliant.
The unit shall be constructed in such a manner that it can be mounted to a standard 2”
ID horizontal pipe with +/- 5 degree adjustment with no specially constructed mounts
or wire splicing methods.
Photocell shall be mounted at the metered service.
Signal Heads All traffic signal heads shall be flat black in color, outfitted with
louvered back plate, tunnel visors with ¾ slot, open to the bottom. Plumbizer for mast arm
mounts shall be located between the red and yellow signal indication unless noted differently
on the plans. All mast arm mounted traffic signal heads shall be aligned to the center of the
travel lane that the indicator is to control.
Light Emitting Diodes (LED) All red, yellow, and green signal indications for all
vehicular signal heads shall be a 12” LED modules and follow ITE VTCSH-LED guidelines.
LED modules acceptable for signal installation shall be Dialight 433 series or approved
equal. If the indicator requires a green lens, the indicator lens shall be clear and have no tint.
Indicators for the Yellow and Red may have a tinted lens or a clear lens. All pedestrian
signal indications shall be 16” x 18” ITE compliant countdown indications. The hand
symbol shall be Portland orange and the walking man symbol shall be lunar white.
Video Detection & Cameras Video detection systems shall be evaluated on an
individual basis by the Transportation Manager. The contractor shall provide all labor,
equipment and cabling for a complete installation of the system to the satisfaction of the city
transportation department. Pelco camera mountings “Astro-Brac” along with a 74” tube
extension shall be used for all mast arm installations. Cameras shall be located in such a
Page 1 of 10
manner that all vehicles can be accounted for and detected until the vehicle enters the
intersection. Field splicing of the video wiring between the camera and cabinet is not
permitted. Prior to acceptance, all video equipment shall be field tested in accordance to the
manufactures recommendations.
Loop Detection Loop detector wire shall be I.M.S.A. Spec. 51-5-1984 #14 AWG to
#20 AWG with Polyethylene (XLPE/XHHW) encasing tube or approved equal. Loop
Detector lead-in cable (LLC) shall be I.M.S.A. Spec 50-2-1984 # 16 AWG or approved
equal. Splicing of the LLC is not permitted between the signal cabinet and loop detector
wire. Loops shall be a minimum of 6’ diameter circle with 3 turns per loop. Loops in
adjacent lanes shall be wound in opposite directions. Preformed loops shall be encased in
PVC and shall be placed between the structural and wearing course unless otherwise
approved by the City Transportation Manager. All new roadways shall have the loops placed
between the structural and wearing course. Loops shall be placed in accordance to the
Nevada Department of Transportation, Standard Drawing T-30.1.4 called “Loop Detectors”.
The LLC shall have 4 to 6 turns per foot between the end of the saw slot and the detector to
prevent separation of the wires. When making the final connections in the controller cabinet,
crimp type connectors should be soldered for additional security and the screws on the
terminal strip securely tightened. The shield must be floated (left unconnected and insulated)
at the splice end and shall be grounded to earth ground at the cabinet end only. All loops
shall have a 1” long non metallic backer rod placed at 2’ intervals to secure the wires and
lead-ins during the sealing operation. The backer rod shall be at least 1” below the top of
pavement. All loops shall be sealed with hot applied asphalt sealant Craftco 34272 or
approved equal. Quadrapole loop layouts shall not be used. Loop amplifiers shall be EDILMD622T Loop Amplifier or approved equal. One Loop Amplifier shall be EDI-ORACLE
2E or approved equal. The saw cut depth for all home runs shall be a minimum of 2½ inches.
There shall be no more than 2 twisted pairs per sawed loop slot. The maximum area of
asphalt allowed to be displaced shall be no more than 6” x 6” when installing loops. LLC
shall be connected to no more than 4 loops and be clearly marked by permanent means (tag
and marker) in the pull box splice point and the traffic signal cabinet.
All Other Detection Types Shall be considered on a case by case basis by the
Transportation Manager. The contractor shall provide all labor, equipment and cabling for a
complete installation of the system to the satisfaction of the city transportation department.
Detection Devices shall be located in such a manner that all vehicles can be accounted for
and detected until the vehicle enters the intersection. Field splicing of wiring between the
detection device and the cabinet is not permitted. Prior to acceptance, all equipment shall be
field tested in accordance to the manufactures recommendations.
Emergency Vehicle Detection All emergency preemption shall be “Global Traffic
Technologies Opticom Infrared System” emergency vehicle detection, latest version (rack
mounted). Phase selectors shall be model 762 and the detectors shall be model 721 or 722.
Prior to acceptance, all Opticom equipment shall be field tested in accordance to the
manufactures recommendations. Iteris Edge system and Iteris eAccess rack mounted
equipment shall be installed in a separate rack(s).
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Signal Poles Utilize all State of Nevada standard poles including Type 1A, 1B, 7,
28, 30, 30A, 35 & 35A. All signal poles over 10’0” shall be equipped with three (3) hand
holes, one (1) at the base of the pole and one (1) opposite the mast arm on back of pole, and a
27” hand hole terminal compartment on the back side of the pole, with the top of the hole six
feet from ground level, placed 180 degrees (180°) from the mast arm. Pedestrian Push
Buttons (PPB) shall be placed so not to conflict with terminal compartment. PPB shall not
be placed on terminal compartment cover. Signal poles shall be installed in accordance to all
State of Nevada specifications and standard plans.
Controller Shall be Naztec 980 series TS1 ATC controller and shall include release
notes that describe the version of software on the controller and the fixes that the current
version addressed. Controllers shall be delivered to the City of Sparks Traffic Division for
testing and burn-in by the supplier no later than two (2) weeks prior to turning on the signal.
Pull Boxes Use State of Nevada number 3 ½, number 5, number 7, and number 9
pull boxes. Utilize a ground able traffic rated (steel cover) pull box unless indicated
otherwise. Number 3½ pull boxes shall only be used for splice locations between loop home
runs and the Loop Lead in Cables (LLC). The maximum number of LLC’s in a Number 3½
pulls boxes shall be limited to two (2).
Pedestrian Push Button All buttons shall meet the following requirements:
 Button housing shall be cast aluminum and powder coated in green. The collar shall
be cast aluminum and powder coated in yellow.
 Button cap must be made of 316 stainless steel.
 Switch must be solid state electronic switch rated for 100 million cycles with no
moving plunger or moving electrical contacts.
 Button must either have NO lit indications upon activation or, if it has a light when
activated, it must remain lit until the walk has been displayed.
 Button must give a two toned beep indication of button being pushed (one tone for
push, one tone for release)
 Button must have built-in surge protection.
 Button must be able to hold the call for a minimum of 5 seconds.
 Button must operate immediately after being completely immersed in water for 5
minutes.
 Button must not be able to allow ice to form such that it would impede function of
button or button cap.
Signs shall be black-on-white international walking man symbol. The housing for the sign
shall be able to accommodate a minimum sign size of 9”x12” per MUTCD requirements.
The horizontal distance from the push button cap to the accessible path way shall be a
maximum distance of ten (10) inches. The vertical distance from the button cap and the
accessible path way shall conform to the Nevada Department of Transportation, Standard
Drawing T-30.1.3.1 called “Pedestrian Push Button Details”.
Page 3 of 10
Metered Service Cabinet The service pedestal shall be a Tesco – Tescoflex service
pedestal model # 27-000 Low Profile detailed for the City of Sparks and shall be a 100 amp
service. All power pedestals shall meet the following criteria: The pedestal shall be a low
profile NEMA Type 3R outdoor enclosure with a flush fit door and closed-cell Neoprene
flange compressed gasket or some type of fixed, oil resistant gasket. The cabinet shall be
manufactured of continuously welded 12 gauge hot dipped galvanized steel, 12 gauge 304
stainless steel, or 1/8” thick aluminum type 5052-H32 with an anti-graffiti powder coat white
finish. There shall be a separate deadfront that is hinged to open for service. There shall be
no exposed fasteners with the exception of a vandal resistant hasp for padlocking purposes.
The cabinet shall be factory wired and tested to NEMA IIB standards with all control wiring
to be 19 strand #14 AWG THHN 600V rated copper. The cabinet shall be labeled UL 508a
and be compliant with the Equipment Utility Service Requirements Committee (EUSERC)
308. All terminals are to be permanently labeled. All circuit breakers shall be clearly labeled
with “up” being “on” per NEC Section 240.81. There shall be As Built factory drawings
enclosed in a clear plastic container held inside the outer door.
Battery Backup The UPS battery back-up system (BBS) shall be a Tesco model
#22 BBS UPS 1400 XL piggy back system that is enclosed in an all welded, powder coated
aluminum UL 508a labeled NEMA 3R enclosure, or a City of Sparks approved equal.
Batteries will not be accepted inside the traffic signal controller cabinet. The UPS (BBS)
shall not interfere with the normal operations of any control equipment located in the traffic
signal controller cabinet. The BBS shall be UL listed and be able to operate between the
NEMA specifications of -30F to +165F (-34C to +74C). The BBS shall have a 2 year factory
warranty that covers replacement parts on the BBS as well as the batteries. The BBS shall
bypass utility power when input voltage is outside the range of 100 to 130 VAC. The BBS
shall be a 24 volt system and have output voltage of 120VAC (+/- 6% VAC) at 60 Hz (+/7%). The BBS shall have surge protection in compliance with IEEE 587/ANSI C.62.41 and
shall prevent feedback per UL 1778. The BBS shall provide power output of 2000VA/1200
Watts of continuous capacity with utility service isolation. The BBS shall have a maximum
transfer time of 2ms and shall not interfere with the normal automatic run-time operating
mode of the traffic signal while switching from battery to utility or from utility to battery
power. The BBS shall have a minimum 60 second hot swappable battery replacement
capability. In the event of inverter/charger failure, battery failure, or complete battery
discharge, the BBS shall automatically revert to a state where utility power is reconnected to
the signal cabinet. The BBS shall have three indicators on the front panel and three dry
relay, single-pole double-throw contacts rated at 120VAC at 1amp to indicate the following
three conditions:
(ON BATTERY closed contacts whenever the unit switches to battery power).
(TIMER closed contacts after the unit has been on battery power for at least 2 hours).
(LOW BATTERY closed contacts when the battery charge reaches 40% battery life).
In addition, there shall be an Event Counter and a Total Run Time counter. The BBS shall
have a manual bypass using two position transfer switches with no off/stop center position.
Use of the bypass shall not interfere with the normal automatic run-time mode of the
intersection. All terminals shall be accessible from the front and have a protective cover to
prevent accidental contact. The BBS shall have the capability to charge from a full discharge
Page 4 of 10
to within 95% of capacity within 6 hours. The BBS shall provide a minimum of 2 hours of
run time with the traffic signal in normal automatic run-time operation. A Users Manual,
Installation Manual, Startup Manual, and Schematic Diagram shall be provided with each
BBS. All necessary hardware for mounting, including all cabling, switches, batteries,
shelving, etc. shall be provided with each BBS. The BBS shall not exceed 40 lbs. (18.2 kg)
for safety and maintenance purposes.
If a backup power supply is not installed, then the cabinet shall be equipped with an
Innovative Technology surge protector model HS-P-SP-120-60A-RJ or City of Sparks
approved equal. All Surge Protection Device (SPD) shall meet the following minimum
requirements: The protection of service entrances shall use Type 1 or Type2 SPD, in
compliance with applicable standards such as UL 1449, UL Standard for Surge Protective
Devices, Edition 3. In accordance with The National Electrical Manufacturers Association
(NEMA), the SPD shall be able to operate between -40F (-40C) to +140F (60C). The SPD
shall provide all mode protection; line-to-ground (L-G), neutral-to-ground (N-G), or where
there is no neutral, line-to-ground (L-G) and line-to-line (L-L). At grounded service
entrances, the SPD shall be wired in a line-to-ground (L-G) or line-to-neutral (L-N)
configuration. The SPD shall have stud-lugs for wire clamping onto the terminals. The SPD
shall protect against surges produced by a 1.2/50 µs and 8/20 µs combination waveform
generator. The SPD shall have a nominal discharge current rating of at least 20kA 8/20 µs
per phase. The short circuit current rating of the SPD shall be coordinated with the available
fault current rating of the supply (panel) to which it is connected, in accordance with NFPA
70, NEC. The maximum continuous operating voltage (MCOV) of the SPD shall be selected
to ensure that it is greater than the upper tolerance of the utility power system to which it is
connected.
Radio Interference Suppressors Each traffic controller unit, flasher, and other
current interrupting device shall be equipped with a suitable radio interference suppresser
installed at the input power point. Interference suppresser shall be of a design which will
minimize interference in both broadcast and aircraft frequencies, and shall provide a
minimum attenuation of 50 decibels over a frequency range of 200 kHz to 75 MHz when
used in connection with normal installations. The interference suppresser shall be
hermetically sealed in a substantial metal case filled with a suitable insulating compound.
Terminals shall be nickel-plated, 10-24 brass studs of sufficient external length to provide
space for connecting two No. 8 AWG conductors, and shall be so mounted that the terminals
cannot be turned in the case. Ungrounded terminals shall be properly insulated from each
other, and shall maintain a surface leakage distance of not less than 1/4 inch between any
exposed current conductor and any other metallic part, with an insulation factor of 100 to 200
megohms dependent on external circuit conditions. Suppressors shall be designed for 125
percent of the total connected load and in no event less than 25 amperes, 120 volts, 60 Hz,
single-phase circuits, and shall be UL compliant. The ground connection of the radio
interference suppressor shall be connected only to AC neutral and shall not be connected to
earth ground directly.
Interconnect Cable All underground copper cable shall be exterior type suitable for
direct burial conforming to REA specifications: PE-39. The cable size shall be 19 AWG.
The number of pairs shall be called out on the plans. The termination of interconnect cable
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wires shall follow the City of Sparks color code table. Wires shall be labeled indicating
direction out of cabinet or splice location and previous termination.
When copper interconnect is specified, an Ethernet switch shall be provided at each signal
cabinet. The switch shall be a RuggedCom RS930L-HI-P-VI-VI, 6-port industrially
hardened, fully managed switch with two (2) 10/100 copper twisted pair ports. Cabling shall
include a 7’ Ethernet 10/100/1000 Mbps as well as a power cord. The cabinet will be wired
with one (1) EDCO Surge Suppression system; PC642C-030LC module and PCB1B terminal
connector, to connect to the city interconnect system. Placement of all equipment shall be
approved by the city prior to installation.
Fiber Optic Communications Cabling, splicing, and conduit & pull boxes for fiber
optic communications shall conform to the following references: City of Sparks Fiber Optic
Cable, Fiber Optic Splice and Distribution Equipment, and Fiber Optic Conduit and Pull Box
Requirements.
The contractor shall supply all necessary cabling and equipment for a complete installation of
all IP addressable equipment outlined on the plans within each cabinet. All equipment shall
meet or exceed the requirements set forth by NEMA TS-2 Standards for Traffic Control
Equipment.
The Ethernet switch shall be a RuggedCom RS900-HI-D-T2T200, 6-port industrially
hardened, fully managed switch or approved equal. The switch shall have six (6) 10/100
copper Ethernet ports and two (2) 100 base FX fiber ports with ST connectors, cabling shall
include 7’ Ethernet 10/100/1000 Mbps as well as a power cord.
Wireless Communication Wireless communication equipment shall be Mountain
Secure model MSS512xx Broadband or approved equal. The contractor shall supply all the
necessary equipment and materials to install a complete system that will function on the City
of Sparks Traffic network with no specialized equipment needed. Prior to acceptance, all
communication equipment shall be field tested in accordance to the manufactures
recommendations. The contractor shall supply a high quality outdoor Cat5e cable capable of
Power over Ethernet (PoE). At a minimum the Cat5e cable shall meet the following
characteristics: double outer jacket, UV protected outer Jacket, 4 twisted pairs of solid bare
copper 24AWG wire with LDPE + Gel, and rip cord. The cable shall support 10/100/1000
Mbps. The Cat5e cable shall not be installed in the same conduit as high voltage lines
providing power service to the signal cabinet or street luminaire’s.
Conduit All intersection signal conduits shall be a minimum of 3” ID. Utilize
“Schedule 80” (PVC) for all underground runs. Rigid metal conduit shall be used under
driveway sections and riser sections. All spare conduits shall have a single 12 AWG (min)
copper tracer wire coated with a 30-mil (min) polyethylene jacket designed specifically for
buried use.
Internally Illuminated Signs All internally illuminated signs shall be in compliance
with the MUTCD, have bottom latching, and manufactured by Quantum Lite (model QSN96D) or approved equal. All signs shall be a 120volt system with LED type lighting and be
Page 6 of 10
8’ double-faced with case-sensitive lettering. City of Sparks logo shall be located on the pole
side of the sign face with appropriate block numbers, arrows, etc. Teri Parkhurst
(tparkhurst@cityofsparks.us) shall be the contact for block numbers.
Conductor/Cable Utilize IMSA rated color-coated cables and conductors. Each
NDOT Type 28, 30, 30A, 35, & 35A signal poles shall be fed, at a minimum, by a single 25
conductor, No. 14 cable. Each NDOT Pedestrian Push Button Post shall be fed by a single 3
conductor, No. 14 cable for each push button installed. NDOT Type 1A and 1B poles shall
be fed, at a minimum, by a single 15 conductor, No. 14 cable. All wire runs shall be made
with the least number of splices possible between the field equipment and the controller
cabinet. Splices shall not be allowed in the hand hole located at the base of the signal pole.
Controller Cabinet Controllers and cabinets shall conform to the State of Nevada
Department of Transportation Standard Specifications for Road and Bridge Construction
(Current Edition), NEMA Standard Publication, TS2 (Current Edition), and the Special
Controller Provisions defined herein. The cabinet shall contain the following Equipment:
1.
The controller cabinet shall be a State of Nevada type R-44 or as specified in the Special
Provisions.
2. The controller cabinet shall be powder coated white inside and outside.
3. The cabinet shall be constructed from type 5052-H32 aluminum with a
minimum thickness of 0.125 inches. The cabinet shall be a NEMA size 7
(“R”) with external dimensions of 77” high, 44” wide, and 26” deep.
4. The cabinet shall be designed and manufactured with materials that will allow rigid
mounting. The cabinet must not flex on its mount. The size 7 (“R”) cabinet is
intended for base mounting only.
5. The cabinet shall include (2) lift ears, attached to the cabinet with a single 3/8” carriage
bolt for each ear.
6. A rain channel shall be incorporated into the design of the main door opening to
prevent liquids from entering the enclosure. The cabinet door opening must be a
minimum of 80 percent of the front surface of the cabinet. A stiffener plate shall
be welded across the inside of the main door to prevent flexing.
7. The top of the cabinet shall incorporate a 1-inch slope toward the rear to prevent
rain accumulation.
8. Sufficient care shall be taken in handling to ensure that scratches are minimized. All
surfaces shall be free from weld flash. Welds shall be smooth, neatly formed, free
from cracks blowholes and other irregularities. All sharp edges shall be ground
smooth. All external seams shall be continuously welded.
9. All cabinets shall be supplied with a minimum of three removable shelves
manufactured from 5052-H32 aluminum. Shelves shall be a minimum of 10 inches
deep.
10. The size 7 cabinet shall include a set of three vertical “C” channels mounted on each
interior side wall of the cabinet for the purpose of mounting the cabinet components.
The channels shall accommodate spring mounted nuts. All mounting rails shall extend
3.125 inches from the bottom of the cabinet. The sidewalls shall be supplied three
channels, with the rear channel located at 7.69” from the back of the cabinet. The
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11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
middle channel shall be 8.5” (all spacing is center to center) from the rear channel, and
the front channel shall be 6” from the middle channel. The rear walls shall be supplied
with three saw tooth rails, with the left-most rail located at 7.88” from the left side of
the cabinet. The middle rail shall be located 9” from the left-most rail, and the rightmost rail shall be 19.5” from the middle rail. The saw tooth rails on back wall shall
allow shelf adjustments in ½” increments.
The main door and police door shall close against a weatherproof and dust-proof,
closed- cell neoprene gasket seal. The gasket material for the main door shall be a
minimum of 0.250 inches thick by1.625 inches wide. The gasket material for the
police door shall be a minimum of 0.250 inches thick by 0.250 inches wide. The
gaskets shall be permanently bonded to the cabinet.
The lower section of the cabinet shall be equipped with a louvered air entrance. The
air inlet shall be large enough to allow sufficient air flow per the rated fan capacity.
Louvers shall satisfy the NEMA rod entry test for 3R ventilated enclosures. A
removable, washable metal mesh air filter measuring 16” X 20” X 1” shall be secured
to the air entrance using a spring. The filter shall fit snugly against the cabinet door
wall.
The roof of the cabinet shall incorporate an exhaust plenum with a vent screen.
Perforations in the vent screen shall be 0.125 inch x 0.50 inch rectangular slots.
The main door on the cabinet shall be equipped with a three-point latching mechanism
with nylon rollers. It shall include an automatic door stop mechanism capable of
holding the door open at approximately 90°, 120°, and 180° (degrees) under windy
conditions. Manual placement of the mechanism shall not be required by field
personnel. The main door shall utilize stainless steel hardware. The handle on the
main door shall have a shank of ¾” diameter. The handle shall include a verticallymounted hasp for the attachment of an optional padlock. The cabinet door handle shall
rotate counter- clockwise to open. The handle shall not extend beyond the perimeter
of the main door at any time. The lock assembly shall be positioned so that the handle
does not cause any interference with the key when opening the cabinet door.
The main door hinge shall be a one-piece, continuous piano hinge with stainless steel
construction and with a stainless steel pin running the entire length of the door. The
hinge shall be attached in such a manner that no rivets or bolts are exposed. All
external fasteners shall be tamper-proof.
The main door shall be equipped with a #2 CCL type lock or equivalent. A minimum of
two keys shall be supplied.
The Police panel assembly door shall be provided with a CCL police lock# R557SGS
or equivalent and has a minimum of one key. The police door assembly shall be
flush- mounted to the main door.
Cabinet shall include two hold-open rods, one on top of door and one on the bottom.
The bottom hold-open rod shall have the ability to latch in three (3) positions,
approximately 90, 105, and 120 degrees.
The lower door stop shall be three-position automatic type.
All base mounted cabinets require anchor bolts to properly secure the cabinet to its base.
The cabinet flange for securing the anchor bolts shall not protrude outward from the
bottom of the cabinet. Four (4) ¾” X 18” long right angle galvanized anchor bolts
shall be provided with the cabinet.
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21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
The controller cabinet shall be equipped with two cooling fans with
adjustable thermostatic control.
The cabinet shall be wired for full 8 phase operation to include 4 pedestrian
movements and four overlaps associated with vehicle phases (16 positions).
Cabinet shall be wired for sixty-four (64) vehicle detector channels using two
channel rack-mounted vehicle detector amplifiers.
Individual ped isolators shall board type and mounted on the detector panel on the
left side of the cabinet.
The detectors will be housed in four racks which shall be mounted in (2) doubledecker configurations.
The cabinet shall be wired for four channels of emergency vehicle pre-empt according to
NDOT specification 623.02.26, using the most recent “opticom” card rack discriminator
and be installed in the left rack. The emergency vehicle discriminator shall be provided
as specified in Emergency Vehicle Detection section. The Opticom shall be installed in
special slots in the lower left-hand rack.
Each cabinet shall be equipped with a malfunction management unit that follows
NEMA TS 2-2003 standard R2008, is compatible with NEMA TS1-1989 devices and
supports amendment 4-2012 of the NEMA TS 2 standard Flashing Yellow Arrow
PPLT operation.
The cabinet shall be wired such that removal of safety monitor and/or controller
will result in the signal entering all red flash mode.
The cabinet shall be supplied with two LED lights which shall come on
automatically when cabinet door is opened.
Ground bus and neutral bus shall allow for direct connection without spade-type lugs.
Terminal strips shall be equipped to land solid or stranded wire by way of landing
lugs or spade lugs. Landing lugs shall be copper.
Field flash shall be programmable by use of hard wiring on terminal blocks. No dog
bones, plugs, or other methods shall be allowed. Initially all phases will be
programmed to flash red.
The cabinet load bay shall include front access to terminals to allow reprogramming
or rerouting of outputs to load switches. The purpose is to allow a conversion, such as
phase two ped to phase one ped, without modifying the back of the load bay.
All controller inputs and outputs shall be available on screw-type terminal strips on
the load bay or on a controller termination panel mounted in the cabinet.
Extra red jumpers will be provided for unused phases in order to insure a red “on” call is
sent to the MMU.
Each cabinet will be equipped with a GFI outlet mounted on the switch shield.
There shall be a duplex receptacle mounted on the video panel mounted on the
left wall. Two (2) additional duplex receptacles shall be mounted on the right
wall, near the upper shelf.
Any extra wiring or equipment installed in the cabinet will be done in a neat and
workmanlike manner. Wiring “hanging out” into open space will not be permitted.
Cables blocking access to other equipment will not be permitted. Items exceeding
reasonable weight limits on shelves will not be permitted. Access to lighting, fans,
and other equipment shall not be blocked. Stacking of equipment on top of
controllers, safety monitors, etc, will not be permitted. Equipment shall be mounted
Page 9 of 10
as intended by manufacturer and according to their specifications. Conflicts will be
resolved by the City Engineer or his designee.
Power Breakers CP1, CP2, CP3 will be non-snap in type breakers, Square D QOU
series.
CP1, CP2, and CP3 will have terminal space connections. CP1 will have a bottom lug
for field AC+ connection.
The main contactor installed in the cabinet shall be normally open. The main
contactor shall be Struthers-Dunn model 418AXXL-120VAC. No mercury
contactors will be allowed.
The cabinet will include signal off switch and signal flash switch mounted behind a
police panel door on the front of the cabinet. An Interval Advance Push Button and a
Manual Control Enabled switch shall be installed in the front door enclosure. The
manual advance shall not operate in such a manner as to bypass minimum times such as
minimum green, yellow clearance, red clearance, pedestrian walk, or pedestrian
clearance intervals.
There will be a stop time switch, controller off switch, ands signal flash switch
installed on the inside of the cabinet door for service use. These switches shall
be protected by a hinged Lexan cover.
A pull-out drawer for plan storage and layout shall be provided. The drawer slides
shall provide a lock-out feature to hold the drawer in place when fully open or
closed.
Detector racks shall be labeled on the drawings with the Channel Number, Phase
Number, Loop Number, Pre-empt Detector Number, and Pre-empt Channel Number
for each slot in the rack. All detector Racks shall be wired per the appendix at the end
of these specifications.
Batteries installed in the signal cabinet for backup power supply will not be permitted.
All cabinet wiring shall conform to the following wire color code:
38.
39.
40.
41.
42.
43.
44.
45.





A/C Line - black wire
A/C Neutral - white wire
Earth Ground – green wire
Logic Ground (DC ground)– white wire with red stripe
+24V DC – blue wire
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