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- 74-3.03B(3) Motor Control Center
- 74-3.03B(5) Miscellaneous Materials
- 74-3.03C Conductor Splices
- 74-3.04 PAYMENT Not Used 74-4 BOOSTER PUMPS 74-4.01 GENERAL
- 74-4.01C(3) Product Data
- 74-4.01C(4) Closeout Submittals
- 74-4.01D Quality Assurance
74-3.03 CONSTRUCTION74-3.03A GeneralDo not install electrical equipment on unpainted wood panels. 74-3.03B Installation74-3.03B(1) GeneralReserved 74-3.03B(2) Conduit, Conductors, and CableDo not install conduits behind ladders or within 15 inches of the ladder-rung vertical centerline. Install flexible conduit with approximately 6 inches of slack between terminations. Flexible conduits and their fittings are considered a discontinuity and must be shunted by bonding jumpers. Install bonding jumpers inside the flexible conduit. Do not use the flexible conduit as the ground. Install conductors and cables under section 87-1.03K and as follows: 1. Pull conductors to prevent damage to the sheath or insulation. 2. Install conductors and cables entering equipment and boxes with drip loops to prevent water reaching the current-carrying parts or other conduits. 3. Remove insulation without damaging the conductor. 4. Identify conductors by number at each termination. Feeder and branch circuit conductors that are ungrounded must have continuously color-coded insulation. Conductors no. 6 AWG or larger may use colored tape. If used, apply tape at each connection and where accessible. Ungrounded conductor color-coding must be as shown in the following table:
74-3.03B(3) Motor Control CenterUse concrete anchorage devices to anchor the motor control center sections to the concrete slab. Shim each section to make the motor control center level. The motor control center sections must fit through the pump house doorway or roof access opening. Any modifications required for installation must be pre-approved by the manufacturer and must not change performance. Install current switches in the starter compartments. Loop power conductors around the sensing coil multiple times.
74-3.03B(4) Panel LPThe panelboard directory must list the equipment controlled and the area designation. The directory must be printed using Times New Roman font and at least 12-point font size. Place the directory in the panelboard door frame with a transparent protective cover. 74-3.03B(5) Miscellaneous MaterialsSecure hangers, brackets, supports, and electrical equipment to surfaces using: 1. Concrete anchorage devices into concrete or solid masonry surfaces 2. Machine screws or bolts into metal surfaces 3. Wood screws into wood construction surfaces 74-3.03C Conductor SplicesDo not splice the drainage pump cables between the pumps and the enclosure shown. Conductor splices must be made only in (1) fixtures, (2) junction boxes, and (3) gutters. Splices must be made using either pressure connectors listed by a NRTL or soldered joints made by soldering irons. Do not use open flame soldering. Insulate splices using the following sequence: 1. Apply 2 half-lapped layers of self-fusing, oil and flame-resistant, synthetic rubber tape covered by 2 half-lapped layers of pressure-sensitive, adhesive, PVC electrical tape at least 7 mils thick. 2. After taping the splice, apply an electrical insulating coating. The coating must be (1) fast drying, (2) resistant to oil, acids, alkalis, and corrosive atmospheric conditions, and (3) compatible with the tape. 74-3.04 PAYMENTNot Used 74-4 BOOSTER PUMPS 74-4.01 GENERAL74-4.01A SummarySection 74-4 includes specifications for installing booster pumps. 74-4.01B DefinitionsReserved 74-4.01C Submittals74-4.01C(1) GeneralReserved 74-4.01C(2) Shop DrawingsSubmit shop drawings for each booster pump. 74-4.01C(3) Product DataSubmit product data for the booster pump, including the following components: 1. Pump, including pump curve and motor information 2. Valves 3. Pump controller 4. Booster pump enclosure 5. Pressure gauge 6. Appurtenances
1. Index
2. Parts list 3. Operating instructions 4. Maintenance instructions 5. Pump curve 74-4.01D Quality AssuranceThe requirements of section 74-1.01D do not apply to the booster pump. Notify the Engineer 5 business days before testing the booster pump. Test the booster pump in the Engineer's presence after connecting the booster pump to the irrigation system. The discharge water from testing must not cause erosion, damage to equipment or plantings, or interfere with ongoing work. The pump must not load the motor to more than the product of the nameplate (1) amperage and (2) service factor. The flow rate must not vary from the pump curve by more than 5 percent at 100 percent motor speed. Test each booster pump at the following test points: 1. Zero flow rate (cutoff head) 2. Maximum flow rate 3. Design heads shown 4. Steady-state flow for each irrigation controller station
1. Motor rpm 2. Motor voltage 4. Suction pressure of the pump 5. Discharge pressure of the pump After testing, run the booster pump through 3 successful, complete irrigation controller cycles. If the booster pump fails testing, adjust system components as necessary and retest. Directory: esc esc -> Biblical Eschatology Presentation by: D. Paul Beck May 4, 2016 Ground Rules esc -> Mikael Håfstrӧm Screenplay by Miles Chapman and Arnell Jesko esc -> Escort affinity Program for Audi Club Members esc -> Preliminary entry form pistol esc -> Application form esc -> Request from Asian and Pacific Training Centre for Information and esc -> Constitution of the engineering student council university of maryland esc -> Subdisciplines of Earth Science Geology; study of the earth Download 6.74 Mb. Share with your friends:
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