Gasboy CFN Islander II - Manual (Page 22)

System Layout
03/07/03 2-11
CONDUIT REQUIREMENTS
The conduit requirements outlined in this section are relevant to all components making up the
GASBOY system including, but not limited to, CFN system units, pumps, remote dispensers,
submersible pumps, submersible starter relays and the circuit breaker panels. The GASBOY
Warranty will not apply to any system deviating from the requirements outlined in this section.
All wiring and conduit runs must conform with all building/fire codes, all Federal, State, and Local
codes, National Electrical Code, (NFPA 70), NFPA 30, and Automotive and Marine Service
Station Code (NFPA 30A) codes and regulations. Canadian users must also comply with the
Canadian Electrical Code.
All wiring (AC and DC) connecting the different components of the CFN System and all
communication equipment signal wires must be installed underground in threaded, rigid, metal
conduit. PVC IS NOT ACCEPTABLE. It is recommended that high voltage AC power wires be
installed in separate conduit from the low voltage DC signal wires. However, if AC and DC wires
share conduit, DC wiring must use the cable specified in Section 3, Communication
Requirements (RS-485), Short Haul Modems (RS-422), and Section 4, Pulser Wiring and
Configuration. When AC and RS-485 or RS-422 wires are combined in the same conduit, only
AC wires for the system and pumps may be in that conduit.
All conduit must be connected to the CFN components through the holes and knockouts provided
by the factory. Do not make any other holes in these units. If alternate holes are required, contact
GASBOY for approval first.
Use the charts below as a guideline to determine the proper conduit sizes for the GASBOY CFN
Series system. When planning the orientation of the wiring runs, follow the applicable GASBOY
wiring diagram and consider the layout of the components at the site. Long runs or a large
number of bends may require you to increase conduit size over what is listed.
To determine conduit size needed, use the THHN/THWN Wire Areas table (left) to find the area
for each wire gauge. Add up all wire areas. Use the Areas of Trade Size Conduit Table (right) to
select the smallest number in the 25% fill area (based on NEC 501-1) that comes closest without
exceeding the total wire area.