Gasboy 9800Q Series - Manual (Page 39)

MDE-4340A Series 9800Q Pumps and Dispensers Installation/Operation Manual · January 2006 Page 5-5
Wiring
To determine conduit size needed, use the THHN/THWN Wire Areas table (above) to find the
area for each wire gauge. Add up all wire areas. Use the Areas of Trade Size Conduit Table
(above) to select the smallest number in the 25% fill area (based on NEC 501-1) that comes
closest without exceeding the total wire area.
Pulse Output or RS-485 Wiring
Pulse Output
When installed in a separate DC conduit, 18 AWG wires are required for installation.
Although it is recommended that DC pulser wires be run in a conduit separate from AC wires,
they can be combined in the same conduit with AC wires providing UL-listed cable with the
following specifications is used:
Conductor 18 AWG stranded wire. Number of conductors to
be determined by number of hoses (2 conductors for
1 hose; 3 conductors for 2 hose)
Shield Foil-wrapped 100% coverage and/or tinned copper
braid 90% coverage
Drain Wire Stranded, tinned copper, 20 AWG or larger/or
braided shield
Voltage Rating Maximum operating voltage of 600V
Environmental Gas- and oil-resistant; suitable for wet or dry
locations
RS-485 Wiring
Twisted pair shielded cable is highly recommended for RS-485 wiring. Although it is
recommended that wires be run in a conduit separate from AC wires, they can be combined in
the same conduit with AC wires providing UL-listed cable with the following specifications is
used:
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
Int Diameter
in mm
Area (Sq Units)
in mm Fill Area (Sq
Units) 25% Fill
in mm
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
Conductor 18 AWG stranded wire. 2 twisted-pairs
Shield Foil-wrapped 100% coverage and/or tinned copper
braid 90% coverage
THHN/THWN Wire Areas