non-metallic, moisture resistant, non -hydroscopic, non -wicking, and non-absorbent. The conductors that are to be marked with tracer in addition to the solid color shall hav e the tracer as part of the insulation. Ink marking is not acceptable. The outside jacket shall be smooth and shall not display patterns of the conductor lay on the outside of the jacket. The traffic signal cable shall be No. 14 AWG stranded conductor. A ll material, color code, and testing shall comply with IMSA 20 -1. The interconnecting cable between intersections for closed loop and telemetry operation shall be 6 pair No 19 AWG, IMSA 20 -2. Loop lead -in conductor shall be tinned copper No. 14 AWG strand ed conductor, twisted pair with an overall shield. The cable shall comply with IMSA 50 -2. Loop detector wire shall comply with IMSA 51 -7 and shall be 19 strand insulated by a cross linked polyethylene compound. The insulated conductor shall be completely incased in a tube of low density polyethylene compound.
1020.03.7 Underground Electrical Junction Box: Only pull
boxes on the Traffic Operations Approved Products List will be accepted.
1020.03.8 LED Blank -Out Signs:
1020.03.8 1 General: Blank -Out Signs shall have “on” or “off”
functions and shall operate on 120 VAC power. Blank -Out Signs legend shall be in compliance with the current FHWA/MUTCD specification. The symbols shall be clearly legible under all lighting conditions. Also, the sign shall be capable of continuous operation over a range in temperatures from -15ºF to +140ºF.
1020.03.8 2 Enclosure: Each enclosure shall be a minimum of
NEMA 3R construction, self -supporting, aluminum. Enclosure shall come with complete mounting hardware to be suspended from a 3/8 inch span wire, or a mast arm as shown on the plans. Enclosure shall use a neoprene strip to provide a watertight seal between the door and the display lens; it also shall have one or more stainless steel link locks to tightly sec ure the door to the gasket. Mount the LED assembly on the face of the Blank -Out Sign. The sign shall have a visor to protect the sign’s face from direct sunlight. Blank -Out Signs’ components shall be readily accessible. Provide drain holes that prevent in sect entrance to the enclosure and an adequate means for condensation to drain from the enclosure. All corners or seams shall be heli - arc welded to provide a weatherproof seal around the entire case. non-metallic, moisture resistant, non -hydroscopic, non -wicking, and non-absorbent. The conductors that are to be marked with tracer in addition to the solid color shall hav e the tracer as part of the insulation. Ink marking is not acceptable. The outside jacket shall be smooth and shall not display patterns of the conductor lay on the outside of the jacket. The traffic signal cable shall be No. 14 AWG stranded conductor. A ll material, color code, and testing shall comply with IMSA 20 -1. The interconnecting cable between intersections for closed loop and telemetry operation shall be 6 pair No 19 AWG, IMSA 20 -2. Loop lead -in conductor shall be tinned copper No. 14 AWG strand ed conductor, twisted pair with an overall shield. The cable shall comply with IMSA 50 -2. Loop detector wire shall comply with IMSA 51 -7 and shall be 19 strand insulated by a cross linked polyethylene compound. The insulated conductor shall be completely incased in a tube of low density polyethylene compound.
1020.03.7 Underground Electrical Junction Box: Only pull
boxes on the Traffic Operations Approved Products List will be accepted.
1020.03.8 LED Blank -Out Signs:
1020.03.8 1 General: Blank -Out Signs shall have “on” or “off”
functions and shall operate on 120 VAC power. Blank -Out Signs legend shall be in compliance with the current FHWA/MUTCD specification. The symbols shall be clearly legible under all lighting conditions. Also, the sign shall be capable of continuous operation over a range in temperatures from -15ºF to +140ºF.
1020.03.8 2 Enclosure: Each enclosure shall be a minimum of
NEMA 3R construction, self -supporting, aluminum. Enclosure shall come with complete mounting hardware to be suspended from a 3/8 inch span wire, or a mast arm as shown on the plans. Enclosure shall use a neoprene strip to provide a watertight seal between the door and the display lens; it also shall have one or more stainless steel link locks to tightly sec ure the door to the gasket. Mount the LED assembly on the face of the Blank -Out Sign. The sign shall have a visor to protect the sign’s face from direct sunlight. Blank -Out Signs’ components shall be readily accessible. Provide drain holes that prevent in sect entrance to the enclosure and an adequate means for condensation to drain from the enclosure. All corners or seams shall be heli - arc welded to provide a weatherproof seal around the entire case. Maximum weight of enclosure including all components sha ll be 35 pounds. The finish for the enclosure body shall be powder coated satin black. The message board mask shall be finished in a flat black powder coat. The inside surface of the glare shield shall be powder coated flat black and the outside surface of the glare shield shall be powder coated the color of the enclosure body.
1020.03.8 3 LED Modules: LED assembly shall be mounted to a
flat black aluminum panel. Diming shall be a standard feature on the Blank -Out Signs. Incorporate a dimmer failsafe feature wh ereby the light engine will continue operating at its full intensity in the event of a dimmer relay or sensor failure.
1020.03.8 4 Electrical: Electrical requirements shall comply with
ITE VTCSH, July 1, 2007 Edition, Light Emitting Diode (LED) Vehicle Arrow Traffic Signal Supplement, Sections 5.2 thru 5.8.
1020.03.9 Flashing Switch Assembly for Beacons:
1020.03.9 1 General: The flashing switch assembly shall include
a preassembled: enclosure, required hubs and gaskets, back panel, Cinch Jones socket, solid state flasher, and terminal block with provision for terminating all field and local wiring. , The assembly specified herein shall be designed to operate on 110 -130 volt, 60 cycle, alternating current, and shall be completely wired and enclosed in a weatherproof cabinet. The flasher shall meet NEMA standards for a two -circuit flasher rated at 15 amps per circuit (Type 3). For the purpose of these specifications, the term “solid state” is defined as: the main current to the signal load that is not switched by electro - mechanically oper ated contacts. The flasher shall be certified by an independent laboratory as conforming to NEMA TS -1, Section 8, and Section 2.2.3.2. This certificate shall be included with the drawing and literature for this equipment.
1020.03.9 2 Cabinet: Furnish the switch in a weatherproof
aluminum cabinet with minimum interior dimensions of 9 -3/4 inches wide, 12 inches long and 5 -1/2 inches deep. Provide a standard lock with one key to the door “Traffic Control” or “Traffic Signals” shall be cast or embossed Maximum weight of enclosure including all components sha ll be 35 pounds. The finish for the enclosure body shall be powder coated satin black. The message board mask shall be finished in a flat black powder coat. The inside surface of the glare shield shall be powder coated flat black and the outside surface of the glare shield shall be powder coated the color of the enclosure body.
1020.03.8 3 LED Modules: LED assembly shall be mounted to a
flat black aluminum panel. Diming shall be a standard feature on the Blank -Out Signs. Incorporate a dimmer failsafe feature wh ereby the light engine will continue operating at its full intensity in the event of a dimmer relay or sensor failure.
1020.03.8 4 Electrical: Electrical requirements shall comply with
ITE VTCSH, July 1, 2007 Edition, Light Emitting Diode (LED) Vehicle Arrow Traffic Signal Supplement, Sections 5.2 thru 5.8.
1020.03.9 Flashing Switch Assembly for Beacons:
1020.03.9 1 General: The flashing switch assembly shall include
a preassembled: enclosure, required hubs and gaskets, back panel, Cinch Jones socket, solid state flasher, and terminal block with provision for terminating all field and local wiring. , The assembly specified herein shall be designed to operate on 110 -130 volt, 60 cycle, alternating current, and shall be completely wired and enclosed in a weatherproof cabinet. The flasher shall meet NEMA standards for a two -circuit flasher rated at 15 amps per circuit (Type 3). For the purpose of these specifications, the term “solid state” is defined as: the main current to the signal load that is not switched by electro - mechanically oper ated contacts. The flasher shall be certified by an independent laboratory as conforming to NEMA TS -1, Section 8, and Section 2.2.3.2. This certificate shall be included with the drawing and literature for this equipment.
1020.03.9 2 Cabinet: Furnish the switch in a weatherproof
aluminum cabinet with minimum interior dimensions of 9 -3/4 inches wide, 12 inches long and 5 -1/2 inches deep. Provide a standard lock with one key to the door “Traffic Control” or “Traffic Signals” shall be cast or embossed Maximum weight of enclosure including all components sha ll be 35 pounds. The finish for the enclosure body shall be powder coated satin black. The message board mask shall be finished in a flat black powder coat. The inside surface of the glare shield shall be powder coated flat black and the outside surface of the glare shield shall be powder coated the color of the enclosure body.
1020.03.8 3 LED Modules: LED assembly shall be mounted to a
flat black aluminum panel. Diming shall be a standard feature on the Blank -Out Signs. Incorporate a dimmer failsafe feature wh ereby the light engine will continue operating at its full intensity in the event of a dimmer relay or sensor failure.
1020.03.8 4 Electrical: Electrical requirements shall comply with
ITE VTCSH, July 1, 2007 Edition, Light Emitting Diode (LED) Vehicle Arrow Traffic Signal Supplement, Sections 5.2 thru 5.8.
1020.03.9 Flashing Switch Assembly for Beacons:
1020.03.9 1 General: The flashing switch assembly shall include
a preassembled: enclosure, required hubs and gaskets, back panel, Cinch Jones socket, solid state flasher, and terminal block with provision for terminating all field and local wiring. , The assembly specified herein shall be designed to operate on 110 -130 volt, 60 cycle, alternating current, and shall be completely wired and enclosed in a weatherproof cabinet. The flasher shall meet NEMA standards for a two -circuit flasher rated at 15 amps per circuit (Type 3). For the purpose of these specifications, the term “solid state” is defined as: the main current to the signal load that is not switched by electro - mechanically oper ated contacts. The flasher shall be certified by an independent laboratory as conforming to NEMA TS -1, Section 8, and Section 2.2.3.2. This certificate shall be included with the drawing and literature for this equipment.
1020.03.9 2 Cabinet: Furnish the switch in a weatherproof
aluminum cabinet with minimum interior dimensions of 9 -3/4 inches wide, 12 inches long and 5 -1/2 inches deep. Provide a standard lock with one key to the door “Traffic Control” or “Traffic Signals” shall be cast or embossed Maximum weight of enclosure including all components sha ll be 35 pounds. The finish for the enclosure body shall be powder coated satin black. The message board mask shall be finished in a flat black powder coat. The inside surface of the glare shield shall be powder coated flat black and the outside surface of the glare shield shall be powder coated the color of the enclosure body.
1020.03.8 3 LED Modules: LED assembly shall be mounted to a
flat black aluminum panel. Diming shall be a standard feature on the Blank -Out Signs. Incorporate a dimmer failsafe feature wh ereby the light engine will continue operating at its full intensity in the event of a dimmer relay or sensor failure.
1020.03.8 4 Electrical: Electrical requirements shall comply with
ITE VTCSH, July 1, 2007 Edition, Light Emitting Diode (LED) Vehicle Arrow Traffic Signal Supplement, Sections 5.2 thru 5.8.
1020.03.9 Flashing Switch Assembly for Beacons:
1020.03.9 1 General: The flashing switch assembly shall include
a preassembled: enclosure, required hubs and gaskets, back panel, Cinch Jones socket, solid state flasher, and terminal block with provision for terminating all field and local wiring. , The assembly specified herein shall be designed to operate on 110 -130 volt, 60 cycle, alternating current, and shall be completely wired and enclosed in a weatherproof cabinet. The flasher shall meet NEMA standards for a two -circuit flasher rated at 15 amps per circuit (Type 3). For the purpose of these specifications, the term “solid state” is defined as: the main current to the signal load that is not switched by electro - mechanically oper ated contacts. The flasher shall be certified by an independent laboratory as conforming to NEMA TS -1, Section 8, and Section 2.2.3.2. This certificate shall be included with the drawing and literature for this equipment.
1020.03.9 2 Cabinet: Furnish the switch in a weatherproof
aluminum cabinet with minimum interior dimensions of 9 -3/4 inches wide, 12 inches long and 5 -1/2 inches deep. Provide a standard lock with one key to the door “Traffic Control” or “Traffic Signals” shall be cast or embossed Maximum weight of enclosure including all components sha ll be 35 pounds. The finish for the enclosure body shall be powder coated satin black. The message board mask shall be finished in a flat black powder coat. The inside surface of the glare shield shall be powder coated flat black and the outside surface of the glare shield shall be powder coated the color of the enclosure body.
1020.03.8 3 LED Modules: LED assembly shall be mounted to a
flat black aluminum panel. Diming shall be a standard feature on the Blank -Out Signs. Incorporate a dimmer failsafe feature wh ereby the light engine will continue operating at its full intensity in the event of a dimmer relay or sensor failure.
1020.03.8 4 Electrical: Electrical requirements shall comply with
ITE VTCSH, July 1, 2007 Edition, Light Emitting Diode (LED) Vehicle Arrow Traffic Signal Supplement, Sections 5.2 thru 5.8.
1020.03.9 Flashing Switch Assembly for Beacons:
1020.03.9 1 General: The flashing switch assembly shall include
a preassembled: enclosure, required hubs and gaskets, back panel, Cinch Jones socket, solid state flasher, and terminal block with provision for terminating all field and local wiring. , The assembly specified herein shall be designed to operate on 110 -130 volt, 60 cycle, alternating current, and shall be completely wired and enclosed in a weatherproof cabinet. The flasher shall meet NEMA standards for a two -circuit flasher rated at 15 amps per circuit (Type 3). For the purpose of these specifications, the term “solid state” is defined as: the main current to the signal load that is not switched by electro - mechanically oper ated contacts. The flasher shall be certified by an independent laboratory as conforming to NEMA TS -1, Section 8, and Section 2.2.3.2. This certificate shall be included with the drawing and literature for this equipment.
1020.03.9 2 Cabinet: Furnish the switch in a weatherproof
aluminum cabinet with minimum interior dimensions of 9 -3/4 inches wide, 12 inches long and 5 -1/2 inches deep. Provide a standard lock with one key to the door “Traffic Control” or “Traffic Signals” shall be cast or embossed Maximum weight of enclosure including all components sha ll be 35 pounds. The finish for the enclosure body shall be powder coated satin black. The message board mask shall be finished in a flat black powder coat. The inside surface of the glare shield shall be powder coated flat black and the outside surface of the glare shield shall be powder coated the color of the enclosure body.
1020.03.8 3 LED Modules: LED assembly shall be mounted to a
flat black aluminum panel. Diming shall be a standard feature on the Blank -Out Signs. Incorporate a dimmer failsafe feature wh ereby the light engine will continue operating at its full intensity in the event of a dimmer relay or sensor failure.
1020.03.8 4 Electrical: Electrical requirements shall comply with
ITE VTCSH, July 1, 2007 Edition, Light Emitting Diode (LED) Vehicle Arrow Traffic Signal Supplement, Sections 5.2 thru 5.8.
1020.03.9 Flashing Switch Assembly for Beacons:
1020.03.9 1 General: The flashing switch assembly shall include
a preassembled: enclosure, required hubs and gaskets, back panel, Cinch Jones socket, solid state flasher, and terminal block with provision for terminating all field and local wiring. , The assembly specified herein shall be designed to operate on 110 -130 volt, 60 cycle, alternating current, and shall be completely wired and enclosed in a weatherproof cabinet. The flasher shall meet NEMA standards for a two -circuit flasher rated at 15 amps per circuit (Type 3). For the purpose of these specifications, the term “solid state” is defined as: the main current to the signal load that is not switched by electro - mechanically oper ated contacts. The flasher shall be certified by an independent laboratory as conforming to NEMA TS -1, Section 8, and Section 2.2.3.2. This certificate shall be included with the drawing and literature for this equipment.
1020.03.9 2 Cabinet: Furnish the switch in a weatherproof
aluminum cabinet with minimum interior dimensions of 9 -3/4 inches wide, 12 inches long and 5 -1/2 inches deep. Provide a standard lock with one key to the door “Traffic Control” or “Traffic Signals” shall be cast or embossed into the metal w ith letters 3/4 inches high or larger on the door. All cabinets shall be suitable for wood or steel pole mounting. Cabinet shall have two 2 -inch wire entrance holes, one in the top and one in the bottom. The wire entrance holes shall be located on the back edge of the cabinet and centered on the width of the cabinet. The hubs to the cabinet shall align on the center of the entrance hole. Lock washers and hex nuts for the bolts shall be used to attach to the hub. The bolt pattern for the hub is 2 - 1/8 inch centered on a line perpendicular to the outside back of the cabinet and 3 -3/4 inch parallel to the back of the cabinet. Mounting holes for the bolts shall be 3/8 inch. The centers of the bolt pattern on the hub and the wire entrance hole shall coinc ide. The location of the hubs shall allow minimum clearance for box end wrenches to fit onto the nuts within the cabinet. Apply paint or powder coat to match the color of the signal heads. The interior shall be furnished with gloss white enamel by the m anufacturer.
1020.03.9 3 Hub, Conduit: Hubs for the cabinet shall be cast
aluminum, ASTM B108. All threaded hubs shall have a threaded collar a minimum of 2 inches from the base of the hub. The manufacturer shall make all hubs with stainless steel bolts casted in to the hub. The manufacturer shall design the hub with the outside smooth to shed water. Table 1020 -2 Cabinet Hub Description TYPE OPENING(S) SIZE, Inches OPENING DESCRIPTION Inches blank - 0 - no opening, flat plate, ¼ minimum thickness single 3/4 one (1) opening, 3/4 conduit thread single 1 one (1) opening, 1 conduit thread single 1-1/2 one (1) opening, 1 -1/2 conduit thread single 2 one (1) opening, 2 conduit thread single 2-1/2 one (1) opening, 2 -1/2 conduit thread single 3 one (1) opening, 3 conduit thread Double 3/4 two (2) openings, each 3/4 conduit thread Double 1 two (2) openings, each 1 conduit thread into the metal w ith letters 3/4 inches high or larger on the door. All cabinets shall be suitable for wood or steel pole mounting. Cabinet shall have two 2 -inch wire entrance holes, one in the top and one in the bottom. The wire entrance holes shall be located on the back edge of the cabinet and centered on the width of the cabinet. The hubs to the cabinet shall align on the center of the entrance hole. Lock washers and hex nuts for the bolts shall be used to attach to the hub. The bolt pattern for the hub is 2 - 1/8 inch centered on a line perpendicular to the outside back of the cabinet and 3 -3/4 inch parallel to the back of the cabinet. Mounting holes for the bolts shall be 3/8 inch. The centers of the bolt pattern on the hub and the wire entrance hole shall coinc ide. The location of the hubs shall allow minimum clearance for box end wrenches to fit onto the nuts within the cabinet. Apply paint or powder coat to match the color of the signal heads. The interior shall be furnished with gloss white enamel by the m anufacturer.
1020.03.9 3 Hub, Conduit: Hubs for the cabinet shall be cast
aluminum, ASTM B108. All threaded hubs shall have a threaded collar a minimum of 2 inches from the base of the hub. The manufacturer shall make all hubs with stainless steel bolts casted in to the hub. The manufacturer shall design the hub with the outside smooth to shed water. Table 1020 -2 Cabinet Hub Description TYPE OPENING(S) SIZE, Inches OPENING DESCRIPTION Inches blank - 0 - no opening, flat plate, ¼ minimum thickness single 3/4 one (1) opening, 3/4 conduit thread single 1 one (1) opening, 1 conduit thread single 1-1/2 one (1) opening, 1 -1/2 conduit thread single 2 one (1) opening, 2 conduit thread single 2-1/2 one (1) opening, 2 -1/2 conduit thread single 3 one (1) opening, 3 conduit thread Double 3/4 two (2) openings, each 3/4 conduit thread Double 1 two (2) openings, each 1 conduit thread
1020.03.9 4 Back Panel Characteristics: The panel shall
have mounted on it a cartridge type fuse, connector for NEMA Type 3 flasher, flasher support bracket, and permanently identified field terminals. The back panel size shall be 9 inches wide and 12 inches high. The back panel constructed of 1/4 inch electrical grade masonite . The panel shall have four (4) mounting holes approximately 11/32 inches in diameter. The holes shall be centered on an 8 -inch x 9 -inch bolt pattern. The bolt pattern shall be centered on the back panel. The back panel shall support the NEMA flasher from the panel along its longest dimension. The support shall not restrict removal or installation of the flasher unit on the back panel while the panel is in the cabinet. All wiring shall be on the front of the panel. Th e field terminals shall be wired to the field side of the terminal block.
1020.03.9 5 Electrical Characteristics: Flashers shall have the
following electrical characteristics:
1.The rating of the output circuit shall be the minimum rating for a tungsten lamp or gas -tuning -transformer load over a voltage range of 60 to 135 volts at 60 hertz. The output circuit shall not be de -rated for the operation over the ambient range of -30 ºF to 165 °F and the humidity range as both detailed in NEMA TS 2 standards.
2.Input to the solid -state flashers shall consist solely of the 60 -hertz alternating -current power source. This input shall supply the power for the output circuit and also provide power to the flasher logic. The flasher shall turn on within 5 degrees of the zero volta ge point of the alternating current line sinusoid and shall turn off within 5 degrees of the zero current point of the alternating -current line sinusoid. The flasher need not turn on within 5 degrees of the zero point of the alternating -current sinusoid f or the first flash cycle (on -off cycle) after the initial application of alternating -current power to the flasher.
3.The “flashing” voltage output shall provide not less than 50, nor more than 60, flashes per minute with an on period of 50 + 5%.
4.The flasher output shall have a dv/dt rating of 100 volts per microsecond at 70 °F.
5.The flasher output shall have a peak standoff voltage of 480 volts or greater at 70 °F.
6.The output current from the flasher through the load, when the flasher is in the off state, shal l not exceed a maximum of 15 milliamperes rms.
7.The flashing output shall consist of 2 outputs each rated at 15 amperes.
1020.03.9 4 Back Panel Characteristics: The panel shall
have mounted on it a cartridge type fuse, connector for NEMA Type 3 flasher, flasher support bracket, and permanently identified field terminals. The back panel size shall be 9 inches wide and 12 inches high. The back panel constructed of 1/4 inch electrical grade masonite . The panel shall have four (4) mounting holes approximately 11/32 inches in diameter. The holes shall be centered on an 8 -inch x 9 -inch bolt pattern. The bolt pattern shall be centered on the back panel. The back panel shall support the NEMA flasher from the panel along its longest dimension. The support shall not restrict removal or installation of the flasher unit on the back panel while the panel is in the cabinet. All wiring shall be on the front of the panel. Th e field terminals shall be wired to the field side of the terminal block.
1020.03.9 5 Electrical Characteristics: Flashers shall have the
following electrical characteristics:
1.The rating of the output circuit shall be the minimum rating for a tungsten lamp or gas -tuning -transformer load over a voltage range of 60 to 135 volts at 60 hertz. The output circuit shall not be de -rated for the operation over the ambient range of -30 ºF to 165 °F and the humidity range as both detailed in NEMA TS 2 standards.
2.Input to the solid -state flashers shall consist solely of the 60 -hertz alternating -current power source. This input shall supply the power for the output circuit and also provide power to the flasher logic. The flasher shall turn on within 5 degrees of the zero volta ge point of the alternating current line sinusoid and shall turn off within 5 degrees of the zero current point of the alternating -current line sinusoid. The flasher need not turn on within 5 degrees of the zero point of the alternating -current sinusoid f or the first flash cycle (on -off cycle) after the initial application of alternating -current power to the flasher.
3.The “flashing” voltage output shall provide not less than 50, nor more than 60, flashes per minute with an on period of 50 + 5%.
4.The flasher output shall have a dv/dt rating of 100 volts per microsecond at 70 °F.
5.The flasher output shall have a peak standoff voltage of 480 volts or greater at 70 °F.
6.The output current from the flasher through the load, when the flasher is in the off state, shal l not exceed a maximum of 15 milliamperes rms.
7.The flashing output shall consist of 2 outputs each rated at 15 amperes.
1020.03.9 4 Back Panel Characteristics: The panel shall
have mounted on it a cartridge type fuse, connector for NEMA Type 3 flasher, flasher support bracket, and permanently identified field terminals. The back panel size shall be 9 inches wide and 12 inches high. The back panel constructed of 1/4 inch electrical grade masonite . The panel shall have four (4) mounting holes approximately 11/32 inches in diameter. The holes shall be centered on an 8 -inch x 9 -inch bolt pattern. The bolt pattern shall be centered on the back panel. The back panel shall support the NEMA flasher from the panel along its longest dimension. The support shall not restrict removal or installation of the flasher unit on the back panel while the panel is in the cabinet. All wiring shall be on the front of the panel. Th e field terminals shall be wired to the field side of the terminal block.
1020.03.9 5 Electrical Characteristics: Flashers shall have the
following electrical characteristics:
1.The rating of the output circuit shall be the minimum rating for a tungsten lamp or gas -tuning -transformer load over a voltage range of 60 to 135 volts at 60 hertz. The output circuit shall not be de -rated for the operation over the ambient range of -30 ºF to 165 °F and the humidity range as both detailed in NEMA TS 2 standards.
2.Input to the solid -state flashers shall consist solely of the 60 -hertz alternating -current power source. This input shall supply the power for the output circuit and also provide power to the flasher logic. The flasher shall turn on within 5 degrees of the zero volta ge point of the alternating current line sinusoid and shall turn off within 5 degrees of the zero current point of the alternating -current line sinusoid. The flasher need not turn on within 5 degrees of the zero point of the alternating -current sinusoid f or the first flash cycle (on -off cycle) after the initial application of alternating -current power to the flasher.
3.The “flashing” voltage output shall provide not less than 50, nor more than 60, flashes per minute with an on period of 50 + 5%.
4.The flasher output shall have a dv/dt rating of 100 volts per microsecond at 70 °F.
5.The flasher output shall have a peak standoff voltage of 480 volts or greater at 70 °F.
6.The output current from the flasher through the load, when the flasher is in the off state, shal l not exceed a maximum of 15 milliamperes rms.
7.The flashing output shall consist of 2 outputs each rated at 15 amperes.
8.Flashers shall be so designed that circuit #1 will be essentially ON when circuit #2 is OFF, and vice -versa. The principal purpose serv ed by this arrangement is to smooth out the loading on the power source. The maximum OFF period when both circuit #1 and circuit #2 are OFF, or the maximum ON period when both circuit #1 and circuit #2 are ON, shall not exceed 17 milliseconds during the t ransition from OFF to ON to OFF.
9.The line power shall be fused with NON 0 -30 amp fuse. This fuse shall be sized properly for the load limit of the flasher. The wiring shall be properly sized for the design current of each circuit. Separate terminals for the line and field neutral shall be provided.
10.Lightning protection shall be provided for line input and each signal circuit. A gas filled fuse shall be across the line input on the load side of the fuse. It shall be capable of clamping input voltage at 3 50 volts. A Metal Oxide Varistor (MOV) shall be on each signal circuit and provide a minimum clamping voltage of 395 volts and dissipate 30 joules of energy (GE - V150LA10A or approved equal).
11.All electrical connectors shall be insulated from the back pan el at a 600 VAC rating.
12.Use a Cinch -Jones socket type S -406-SB or equivalent.
13.All printed circuit boards shall be made from NEMA (FR -4) glass - epoxy, or equivalent (See NEMA Standards Publication No. LI 1 -1971). Circuit boards exceeding 2 inches in any dim ension shall have a nominal thickness of at least 1/32 inches.
14.All PC boards shall be coated with an epoxy or approved equal type material to prevent erratic performance due to high humidity, condensation, and growth of fungus and mildew. This coating wil l not cover the components on the board, but once the components are in place, the soldered joints shall be covered with a moisture and fungus proof, clear type of acrylic lacquer. This coating shall not be injurious to the board or components and shall n ot interfere with the repair of the circuitry or replacement of components. The walls of all plated through holes shall have a minimum copper plating thickness of 0.001 inches. All circuit tracks shall have conductivity equivalent to at least 2 ounces per square foot of copper (2 oz/ft² Cu).
15.All electrical mating surfaces shall be made of non -corrosive material. The unit shall be designed so that each component is identified by a circuit reference symbol. This identification may be affixed to the printed circuit boards, the cover of the unit, or in an assembly drawing provided with the unit.
1020.04 Poles for Traffic Si Gnal Systems.
1020.04.1 Pedestal Signal Poles: The pole shall be in accordance
with the plans. The base of the pedestal pole shall be cast iron or aluminum and shall be at least 16 inches wide at the bottom, at least 16 inches high and shall be octagonal. The upper end of the base shall be threaded to receive a 4 -inch diameter pipe shaft. The base shall be designed so that it may be fastened to the f oundation using 5/8 -inch-by-16-inch anchor bolts located 90 degrees apart on the circumference of a circle 12 -3/4 inches in diameter. The base shall contain a removable door to allow access to anchor bolts and to permit cable splicing. This door shall be fastened to the base using a hex head stainless steel screw into a threaded hole in the base. The shaft shall be 4 inches in inside diameter welded steel tubing with a minimum 1/8 -inch wall thickness. The lower end of the shaft shall be welded to a 6 -inch nipple to screw into the base. This shaft shall be a single piece of tubing. Apply paint or powder coat to match the color of the signal heads.
1020.04.2 Steel Signal Strain Pole:
1020.04.2 1 General: Poles and fittings shall be in accordance
with the plans and shall be ga lvanized in accordance with Section 811 . Poles shall be suitable for a minimum horizontal load of 4,000 pounds applied 1 foot below the top of pole.
1020.04.2 2 Pole Shaft: The pole shaft shall have a minimum
base diameter of 11 inches and a maximum base diameter of 11 3/4 inches. The pole shaft shall be tapered to 7 1/2 inch minimum to 8 1/2 inch maximum diameter at the top. The pole shaft may have a round or octagonal cross section. A removable cap shall be used to cover the top of the pole shaft. The pole shall be designed so that its maximum deflection is as shown in Table 1020 -3.
Source: Louisiana Standard Specifications for Roads and Bridges, 2016 Edition. Pages 1135–1139 of 1,145.