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Communication Requirements
installations must comply with the National Electrical Code (NFPA 70), NFPA 30, and the
Automotive and Marine Service Station Code (NFPA 30A) codes and regulations. Canadian
installations must comply with the Canadian Electrical Code.
2
Power: The AC power for the short haul modem should come from the same breaker that
supplies the peripheral device or the system (Micro Feed).
3
Cable: Twisted pair shielded cable is highly recommended for RS-422 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:
• Conductor: 18 AWG stranded wire. 2 twisted-pairs.
• 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.
Gasboy can supply Belden 1063A (P/N C09655) which is a UL-Listed, 4-conductor cable that
meets the requirements listed above.
Note: Belden 1063A is UL-Listed but not CSA listed.
Cable with a voltage rating of less than 600V must be installed in a conduit separate from all
AC wires.
These modems must be connected with private lines and will not work if connected into a
telephone network.
4
Conduit: When using the recommended shielded twisted-pair cable described previously, RS-
422 wires can be run with AC wires in metal conduit. The shield drain wire must be connected
to the system AC ground. Only AC wires for the system and pumps can be installed in the AC
conduit. Do not run the cable outdoors without the use of metal conduit. Do not run this cable
overhead, outdoors.
The cable can be run indoors without the use of metal conduit. The shield drain wire must be
connected to the system AC ground (at one end only).
If using cable other than that recommended previously, the RS-422 field wires must be
installed in a metal conduit separate from any AC wires.
Distance: The maximum field wiring cable length is not to exceed 1500 feet (455m).
5
MDE-4319A TopKAT Fuel Managment System Installation Manual · November 2005
General Installation
Page 21
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