637 20. Total harmonic distortion, current and voltage, induced into an ac power line by a signal module shall not exceed 20 percent (20%) , over the operating voltage range specified in Section 14 and wi thin the ambient temperature range specified in Section 4.
21.The signal module on -board circuitry shall include voltage surge protection to withstand high -repetition noise transients and low -repetition high -energy transients as stated in Section 2.1.6.NEMA S tandard TS -2, 1992.
22.The L.E.D. signal module shall operate from a 60+/ -3 Hz ac line over a voltage range from 80 Vac to 135 Vac, drawing a minimum of 100 mA rms over the entire voltage range. Load switches shall be compatible with NEMA TS -1 or later.
23.All L.E.D. signal modules shall be energized for a minimum of 24 hours, at 100 percent (100%) on-time duty cycle, in an ambient temperature of 60 °C.
24.Manufacturers shall provide a Certificate of Compliance to this specification for each shipment of L.E.D. sign al modules to an end user. Each L.E.D. signal module shall be identified with a serial number.
25.Warranties shall include the replacement or repair of an L.E.D. signal module that fails to function as intended due to workmanship or material defects within t he first 60 months from the date of delivery. Also, replacement or repair of L.E.D. signal modules that exhibit luminous intensity of less than the minimum values specified in Table 1 of ITE August, 1997, draft specification within the first 36 months fro m the date of delivery.
660.11 Cabinets :
The cabinets for all types of traffic controllers or flasher units shall be mounted and installed at the location shown on the Plans and in accordance with typical installat ion details. No mounting holes or special outlets shall be made through the cabinet walls without the specific approval of the Engineer. Adjustable steel bands or universal cabinet mounting bands shall not be used for mounting cabinets to poles or pedestals. Cabinets mounted on wood poles shall be attached with wood pole mounting brackets, secured with lag screws.
660.12 Support Structures :
Strain and mast -arm poles shall be installed with the amo unt of rake recommended by the pole manufacturer. The rake shall assure a substantially vertical set when the load is applied. For anchor base type poles, threaded adjusting nuts shall be used to establish the rake. The use of shims or other leveling de vices is not permitted. Hardware and fittings shall be installed as shown on the manufacturer's installation drawings. When embedded or wooden poles are used, the rake shall be established as the pole is set. Pedestal poles supporting only a vertical de ad load shall be installed in a true vertical plane. The Contractor shall take full responsibility for checking all cross sections to determine final support lengths.
660.13 Messenger Cable :
When completely loaded the messenger cable, cable rings and conductor wire shall present a straight, clean, neat appearance. Excessive slack shall be pulled out of conductor wire and the ring supports shall be set at fifteen ( 15) inch centers. Span wire sag shall be kept at a practical minimum and in no case exceed five percent (5%) of the span.
Source: West Virginia Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 657–657 of 1,006.