Gasboy TopKAT Fuel Management System Installation - Manual (Page 21)

MDE-4319E TopKAT™ Fuel Management System Installation Manual · August 2008 Page 15
Conduit Requirements General Installation
All wiring and conduit runs must conform to all building/fire codes, all Federal, State, and
Local codes, the National Electrical Code (NFPA 70), NFPA 30, and the Automotive and
Marine Service Stations Code (NFPA 30A). Canadian users must also comply with the
Canadian Electrical Code.
Use the tables below as a guideline to determine the proper conduit sizes for the Gasboy
TopKAT FMS. When planning the orientation of wiring runs, follow the applicable Gasboy
wiring diagram and consider the layout of components at the site. Long runs or a large number
of bends may require you to increase the conduit size over what is listed here.
To determine the conduit size required, use the “THHN/THWN Wire Areas” table to find the
area for each wire gauge. Add up all wire areas. Use the “Areas of Trade Size Conduit” table
to select the smallest number in the 25% fill area (based on NEC 501-1) that comes closest
without exceeding the total wire area.
THHN/THWN Wire Areas
Gauge
Diameter Area (square units)
Inches Millimeters Inches Millimeters
18 .090 2.29 .007 4.1
16 .104 2.64 .009 5.5
14 .118 2.95 .011 6.8
12 .135 3.43 .014 9.2
10 .169 4.29 .022 14.5
8 .216 5.49 .037 23.7
6 .259 6.60 .053 34.2
4 .331 8.41 .086 55.5
3 .359 9.14 .102 65.6
2 .394 10.01 .122 78.7
1063A .417 10.59 .137 88.4
Areas of Trade Size Conduit
Trade Size
Internal Diameter Area (square units) Fill Area (square units) 25% fill
Inches Millimeters Inches Millimeters Inches Millimeters
1/2 .629 16 .303 196 .076 49
3/4 .826 21 .532 343 .133 86
1 1.063 27 .862 556 .215 139
1-1/4 1.378 35 1.50 968 .375 242
1-1/2 1.614 41 2.04 1314 .509 329
2 2.087 53 3.36 2165 .839 541