Extension Leaflet, no. 336 (1951) |
Previous | 1 of 4 | Next |
|
|
Loading content ...
Extension Leaflet 336 1951 FARM WATER SYSTEM Wiring the Water System by Paul E. Johnson Agricultural Engineering ALL WIRING SYSTEMS should comply with specifications of the National Electrical Code. The code is a set of regulations of the National Board of Fire Underwriters, and sets up standards of wiring which are intended to promote safety. A copy of the code may be obtained from the National Board of Fire Underwriters, 222 West Adam Street, Chicago 6. Illinois. A recommended practice is to locate the meter pole near the center of the electrical load. The service wire from the transformer comes to the meter and fuse disconnect box on the pole. From here separate feeders supply each farm building. The line beyond the last fuse is called a branch. Branches are fused according to the load they carry. The pumping unit should always be on an individual branch. If the unit is located in the basement or a room off the basement, one of the branches in the building's main service cabinet may be used. However, it is more desirable that the pump motor be on an individual branch from the yard or meter pole and connected ahead of the main breakers or fuses serving other buildings. (See Fig. 1.) Underground service to the pump house is very desirable particularly since the development of the new underground service cable. This cable has a heat and moisture resisting rubber insulation and neoprene sheath covering. This cable should be installed below the frost level for protection from damage due to freezing and thawing of the ground. Also, this will place it below danger of accidental damage by spade or cultivating equipment. The right size wire must be used or there may be less voltage to the motor than its rated voltage, which in turn means that the motor will overheat, and will develop less than its rated power. A 5 percent voltage drop below the voltage given on the name plate of the motor will decrease its efficiency approximately 20 percent. On a water pump, because of the hard starting torque, the motor may not be able to start on the low voltage and will therefore burn out. The following table gives the recommended wire gauge sizes for water pump branch circuits: TABLE 1. Recommended wire gauge sizes for pump branch circuits HP Rating of Single Phase Motors Distance from Pump Motor to Feeder >0ft. 100 ft 150 ft 200 ft 250 ft. 350 ft. 400 ft V* •A ft 1 1 )5v 12 12 12 12 230v 12 12 12 12 12 115v 12 12 10 10 230v 12 12 12 12 12 I15v 230v 10 12 10 12 10 12 8 12 12 115v 230v 10 12 8 12 8 12 6 12 115v 230v 8 12 8 12 6 12 6 12 10 115v 230v 6 12 6 12 6 12 4 10 10 115v 230v 6 12 6 12 4 10 4 10 8 Wire sizes are based on a 2 percent line drop to accommodate lights which may be on the same branch.
Object Description
Title | Extension Leaflet, no. 336 (1951) |
Purdue Identification Number | UA14-13-leaflet0336 |
Title of Issue | Farm water system : wiring the water system |
Author of Issue | Johnson, Paul E. |
Date of Original | 1951 |
Publisher | Purdue University. Agricultural Extension Service |
ISSN | 2373-289X |
Subjects (LCSH) |
Water-supply, Rural Electric wiring |
Genre | Periodical |
Collection Title | Leaflet (Purdue University. Department of Agricultural Extension) |
Rights Statement | Copyright Purdue University. All rights reserved. |
Coverage | United States - Indiana |
Type | text |
Format | JP2 |
Language | eng |
Repository | Purdue University Libraries |
Date Digitized | 10/22/2014 |
Digitization Information | Original scanned at 400 ppi on a BookEye 3 scanner using Opus software. Display images generated in Contentdm as JP2000s; file format for archival copy is uncompressed TIF format. |
URI | UA14-13-leaflet0336.tif |
Description
Title | Extension Leaflet, no. 336 (1951) |
Purdue Identification Number | UA14-13-leaflet0336 |
Transcript | Extension Leaflet 336 1951 FARM WATER SYSTEM Wiring the Water System by Paul E. Johnson Agricultural Engineering ALL WIRING SYSTEMS should comply with specifications of the National Electrical Code. The code is a set of regulations of the National Board of Fire Underwriters, and sets up standards of wiring which are intended to promote safety. A copy of the code may be obtained from the National Board of Fire Underwriters, 222 West Adam Street, Chicago 6. Illinois. A recommended practice is to locate the meter pole near the center of the electrical load. The service wire from the transformer comes to the meter and fuse disconnect box on the pole. From here separate feeders supply each farm building. The line beyond the last fuse is called a branch. Branches are fused according to the load they carry. The pumping unit should always be on an individual branch. If the unit is located in the basement or a room off the basement, one of the branches in the building's main service cabinet may be used. However, it is more desirable that the pump motor be on an individual branch from the yard or meter pole and connected ahead of the main breakers or fuses serving other buildings. (See Fig. 1.) Underground service to the pump house is very desirable particularly since the development of the new underground service cable. This cable has a heat and moisture resisting rubber insulation and neoprene sheath covering. This cable should be installed below the frost level for protection from damage due to freezing and thawing of the ground. Also, this will place it below danger of accidental damage by spade or cultivating equipment. The right size wire must be used or there may be less voltage to the motor than its rated voltage, which in turn means that the motor will overheat, and will develop less than its rated power. A 5 percent voltage drop below the voltage given on the name plate of the motor will decrease its efficiency approximately 20 percent. On a water pump, because of the hard starting torque, the motor may not be able to start on the low voltage and will therefore burn out. The following table gives the recommended wire gauge sizes for water pump branch circuits: TABLE 1. Recommended wire gauge sizes for pump branch circuits HP Rating of Single Phase Motors Distance from Pump Motor to Feeder >0ft. 100 ft 150 ft 200 ft 250 ft. 350 ft. 400 ft V* •A ft 1 1 )5v 12 12 12 12 230v 12 12 12 12 12 115v 12 12 10 10 230v 12 12 12 12 12 I15v 230v 10 12 10 12 10 12 8 12 12 115v 230v 10 12 8 12 8 12 6 12 115v 230v 8 12 8 12 6 12 6 12 10 115v 230v 6 12 6 12 6 12 4 10 10 115v 230v 6 12 6 12 4 10 4 10 8 Wire sizes are based on a 2 percent line drop to accommodate lights which may be on the same branch. |
Tags
Comments
Post a Comment for Extension Leaflet, no. 336 (1951)