Gasboy 580 - Manual (Page 15)

Wiring
03/07/03 3-3
CONDUIT
All wiring to the GASBOY Series 580 dispensing unit must be installed in threaded, rigid, metal
conduit. PVC is not acceptable. When the Series 580 dispensing unit is used with a GASBOY
fuel management system, it is recommended that AC power wires be installed in a separate
conduit from the DC pulser; they should not run in any sort of common conduit or trough.
However, if AC and DC power wires share conduit, pulser wiring must use the cable as specified
in the Pulsers section.
When using a fuel management system other than a GASBOY system, see the manufacturer's
installation manual for specific conduit requirements.
All wiring and conduit runs must also conform with the National Electrical Code (NFPA 70) and the
Automotive and Marine Service Station Code (NFPA 30A). All wiring and conduit runs must
conform to local codes. Canadian users must also comply with the Canadian Electrical Code.
Use the charts below as a guideline to determine the proper conduit sizes. 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.