§ 50.089 ELECTRICAL APPARATUS; DESIGN, ASSEMBLY AND TEST.
   (A)   General.
      (1)   The electrical apparatus control panel design, assembly and installation and the integration of component parts will be the responsibility of the manufacturer of record for this booster pumping equipment. The manufacturer shall maintain, at his or her regular place of business, a complete electrical design, assembly and test facility to assure continuity of electrical design with equipment application. Control panels designed, assembled or tested at other than the regular production facilities or by other than the regular production employees of the manufacturer of record for this booster pumping equipment will not be approved. These facilities must be open for inspection at any time during the design and assembly of the specified equipment.
      (2)   The switchgear and supervisory controls will be tested by one or more technicians independent of the equipment assembly. The test procedure shall be a complete function test. All control functions will be tested, a minimum of four times hourly, for a consecutive trouble-free period of 48 hours. At the request of the consulting engineer, the booster station manufacturer shall supply documentation of the test results. The documentation will include a chart from an event recorder certifying the four time hourly test cycle and the 48-hour trouble-free duration. The event recorder chart will be attested to by a company officer of the booster station manufacturer.
   (B)   UL listing.
      (1)   The manufacturer of the booster station shall be an Underwriters Laboratories listed manufacturer of Industrial Control Panels. As such, the manufacturer shall provide UL listing of the control panel for the station. In accordance with UL procedures, an authorized UL label, verifying the UL listing, shall be affixed to the back pan of the control panel. Additionally, the manufacturer shall provide certification of the listing. The manufacturer's certification of UL listing shall consist of a signed statement of a corporate office attesting to the following:
         (a)   The subject control panel has been UL listed;
         (b)   The UL file number of the manufacturer under which the listing has been made; and
         (c)   The identification number or a listing mark of the specific UL label affixed to the back pan of the control panel to verify listing.
      (2)   Control panel equipment shall not be accepted where any of the following occur:
         (a)   The control panel is not UL listed;
         (b)   Certification of the control panels UL listing is not provided;
         (c)   The manufacturer is not a UL listed manufacturer of Industrial Control Panels; or
         (d)   The manufacturer of record for the booster pumping equipment is not also the manufacturer of the control panel.
   (C)   Switchgear.
      (1)   The electrical apparatus shall consist of all equipment associated with motor control and motor starting, including the equipment used to protect the electrical facilities. All circuit breakers, motor starters, time delay relays and control relays shall be incorporated to one NEMA I control panel. Space shall be provided in the control panel for the motor breaker, motor starter and controls for future Pump 3. Conduit from the control panel to the location of the future motor shall be complete in place. The electrical service provided for this station will be 460 volt, three-phase, 60 cycle three-wire. There shall be provided, thermal-magnetic trip circuit breakers as follows:
         (a)   Two branch breakers, one each per pump, 40 amps; and
         (b)   One transformer breaker, primary side, 40 amps.
      (2)   There shall be provided seven auxiliary circuit breakers as follows:
         (a)   Controls;
         (b)   Lights;
         (c)   Heater;
         (d)   Area light;
         (e)   Sump pump - dehumidifier;
         (f)   Exhaust fan; and
         (g)   Convenience outlets.
      (3)   Pump starting equipment shall be three-phase, full voltage magnetic starters connecting the pump motor directly across the line, complete with overload relay with correctly sized heater elements on each line.
      (4)   Balanced 240/120 single-phase power for the auxiliary circuits within the scope of the booster station shall be obtained by use of a ten KVA dry, step down transformer. The transformer shall be wall mounting type, dust-tight and operate with low noise level. Transformer insulation shall be class H. The unit shall be UL approved for indoor application.
   (D)   Suction pressure control.
      (1)   Suction control of the pumping operation shall be provided by a rugged snap action pressure switch. The switch action shall be actuated by a single brass bellow. Each switch assembly will feature straight in-line and relatively friction free construction and be complete with a single pole, double throw contact block with silver, five-amp rated contacts at 120 volts. The set points of the on/off cycle shall be independently adjustable through the full range of switch differential.
         (a)   Low suction cut-out: zero to 150 psi range; and
         (b)   Adjustable differential: two to 25 psi range.
      (2)   A single four and one-half inch dial, flanged back pressure gauge shall be sub-panel mounted adjacent to the low suction pressure switch. The gauge and switch shall be so plumbed with the suction header sensing line that a common blowoff valve can relieve pressure in both simultaneously for purposes of checking and calibrating the low suction lock-out.
   (E)   Local pressure control.
      (1)   Control of the pumping operation shall be provided by bellows type, snap action switches. The switch action shall be actuated by a single brass bellows. Each complete switch assembly will be complete with two internal switches, one each to cover the start and the stop cycle. Each internal switch shall be independently adjustable so as to provide from two psi to full scale control differential. Switches are to be provided to control the following functions:
         (a)   Start lead pump: zero to 200 psi control range; and
         (b)   Start back-up pump: zero to 200 psi control range.
      (2)   A single four and one-half inch dial, flanged back pressure gauge shall be sub-panel mounted adjacent to the discharge pressure switches. The gauge and switches shall be so plumbed with the discharge header sensing line that a common blow off valve can relieve pressure in all simultaneously for purposes of checking and calibrating the start-stop functions of the pumps.
      (3)   Pressure switches and gauges shall be mounted in tandem, on a plate, as near to their respective pressure source as is practical. Switches and gauges will not be allowed within the electrical control panel.
   (F)   Devices.
      (1)   Five solid state time delay relays shall be provided to perform the following functions:
         (a)   Low suction timer;
         (b)   Start control timer pump 1;
         (c)   Stop control timer pump 1;
         (d)   Start control timer pump 2; and
         (e)   Stop control timer pump 2.
      (2)   The solid state time delay relay shall have three dial selected timing ranges (one, ten and 100 minutes). Nominally, the timer will be factory set on the ten-minute range. The timers shall be constructed to use a standard octal eight pin plug-in base. All timer wiring shall be made to the plug-in base so that timers can be interchanged or replaced without disturbing timer wiring. The timer will be complete with a light emitting diode (LED) which will be on during the time cycle and off at the end of timing.
      (3)   Hand-off automatic switches shall be oil-tight, three-position maintained and be located on the main control panel door and control the following circuits:
         (a)   Pump 1;
         (b)   Pump 2; and
         (c)   Exhaust fan.
      (4)   Indicating lights to indicate equipment operation shall be oil-tight, with a full voltage pilot light. Indicating lights shall be provided in the colors and functions as follows:
         (a)   Red: low suction pressure;
         (b)   Green: pump 1 in operation; and
         (c)   Green: pump 2 in operation.
      (5)   Nameplates shall be furnished on all panel front mounted switches and lights. Name tags shall also indicate proper nomenclature of control panel internal parts.
      (6)   The control panel door shall include a plastic pocket on the interior to hold one copy of the panel wiring diagram. The wiring diagram shall be corrected as-built copy and contain individual wire numbers, circuit breaker numbers, switch designations and control function explanations.
   (G)   Wiring and lighting.
      (1)   It shall be the responsibility of the installing electrician to furnish and install the correct size service wires from the service pole outside of the equipment capsule to the connection terminals inside the power or control panel designated for that purpose. No splice will be allowed in the service wires. It shall also be the responsibility of the installing electrician to furnish and install, if required, any exterior disconnects or other switching mechanisms and seal the incoming conduit to prevent potential ground water intrusion into station.
      (2)   Rigid conduit, sized to adequately accept the inbound service connectors, shall be installed from the main power or control panel through the equipment capsule. The service entrance conduit connection shall be plugged for shipment.
      (3)   All wiring within the equipment capsule and outside of the control panel or panels shall be run in conduit except for the water-tight flexible conduit and fittings properly used to connect pump drivers, fan motors, solenoid valves, limit switches and the like, where flexible connections are best utilized. Accessories as the sump pump and dehumidifier, when furnished by the original manufacturer with a UL approved rubber cord and plug, may be plugged into polarized receptacles designated for that purpose. All internal equipment conduit and wire will meet or exceed the conduit, wiring schedule and electrical codes set forth as follows:
         (a)   Service entrance. Rigid, heavy wall, steel conduit with threaded water-tight connections adequately sized to handle the type, number and size of the incoming service conductors - in compliance with Article 346 of the National Electrical Code;
         (b)   Equipment capsule conduit. Rigid, heavy wall, Schedule 40 PVC with solvent weld moisture-proof connections adequately sized to handle the type, number and size of equipment conductors to be carried, in compliance with Article 347 of the National Electrical Code and NEMA TC-2, Federal WC-1094A and UL 651 Underwriters Laboratory Specifications;
         (c)   Flexible connections. Where flexible conduit connections are necessary the conduit used shall be liquid-tight flexible totally non-metallic, corrosion resistant, non-conductive, UL listed conduit with a sunlight resistant jacket over an inner flexible core, sized to handle the type, number and size of equipment conductors to be carried, in compliance with Article 351 of the National Electrical Code;
         (d)   Motor circuit conductors; sized for load. All branch circuit conductors supplying a single motor of one horsepower or more shall have an ampacity of not less than 125% of the motor full load current rating, dual rated type THHN/THWN, as set forth in Articles 30 and 430-B of the National Electrical Code, Schedule 310-13 for flame retardant, heat resistant thermoplastic, copper conductors in a nylon or equivalent outer covering;
         (e)   Control and accessory wiring. Sized for load, type MTW/AWM (machine tool wire/appliance wiring material) as set forth in Articles 310 and 670 of the National Electrical Code, Schedule 310-13 and NFPA Standard 79 for flame retardant, moisture, heat and oil resistant thermoplastic, copper conductors in compliance with NMTBA and as listed by Underwriters Laboratories (AWM), except where accessories are furnished with a manufacturer supplied UL approved rubber cord and plug. Four duplex, grounding type, three wire, polarized convenience receptacles shall be furnished about the periphery of the equipment capsule. One duplex receptacle shall be adjacent to the main control panel. The equipment ground wire from each equipment ground post of the polarized receptacles shall be affixed at the main control panel terminal board solely designated for that purpose and separate from the neutral bus; and
         (f)   Lighting. There shall be three two-tube, 40 watt per tube, rapid start, enclosed and gasketed fluorescent light fixture installed within the equipment capsule. One light fixture shall be located directly over the main control panel and be 48-inch minimum length. The light switch shall be of the night glow type and be located in the entrance manway, conveniently adjacent to the equipment capsule entrance ladder. Open or incandescent fixtures without OSHA approval will not be accepted.
(Ord. passed 6-21-2011)