The telemetering system shall be suitable for operation on 120 volts, single-phase, 60 cycles.

A scanner system may be used for transmitting from the pumping station and receiving at the WSSC Control Room status indications and alarms. But for all control functions, individual frequency shift transmitters and receivers shall be used. For transmission of levels or pressures to the control room from remote sensing points where no control is involved AM transmitters and receivers may be used.

Pressure and level indicating transmitters shall have a time cycle of 15 seconds.

Leased telephone lines shall be used for signal transmission between the pumping station and remote control points and between pumping station and WSSC Control Room. A telephone terminal cabinet of adequate size, surface mounted, shall be provided on the wall near the motor control center close to the telemetering cabinet.

All equipment for telemetering, control and indications, alarms and instrumentation to be installed at the WSSC Control Room has to be furnished by contractor, but installation will be done by WSSC.

Location for all equipment needed for control, indication, alarms, instrumentation, etc., shall be clearly indicated on the schematic drawings and coordinated with floor plans. All conduits and wiring needed for a functioning system shall be clearly indicated on floor plans and all field mounted devices like limit switches, auxiliary contacts, and solenoid valves shall be specified with the associated major equipment and indicated on plans. (Amended during 2019 codification; 28-ME-DG-02 § 23.13)