Gasboy 552A Series - Manual (Page 15)

Wiring
03/07/03 3-3
Pulser Wiring
Pulser wiring must be 18AWG. If it is run in the same conduit as the AC wiring, it must also
conform to the following wiring requirements:
•
Wire must be 2-wire twisted-pair Belden 88760 (C08850) or 4-wire Belden 89418 or
equivalent (C08864).
Both types of cable provide superior noise immunity and are rated as follows:
Belden 88760
Gas and oil resistant insulation & jacket
18 AWG tinned, stranded, copper
One twisted pair (two conductors)
300 volt maximum operating voltage
Aluminum/Mylar shielded w/drain wire
Belden 89418:
Gas and oil resistant insulation & jacket
18 AWG tinned, stranded, copper
Stranded, four conductors
300 volt maximum operating voltage
Aluminum/Mylar shielded w/drain wire
NOTE: If using 88760 cable with a 3-wire pulser, you must run two lengths of cable to
attain two twisted pairs (four conductors). Cap off the unused wire.
•
Cable connections to pulser must be made in DC junction box. Pulser cables will pass
through AC junction box.
•
Cable drain wire must be connected to the grounding screw in the DC junction box in the
pump/dispenser. The drain wire is not connected at the fuel management system end.
•
Rigid metal conduit must be used to connect the AC and DC junction boxes.
Conduit
All wiring to the Gasboy 550A Series dispensing unit must be installed in threaded, rigid, metal
conduit. PVC is not acceptable. It is recommended that DC pulser wiring be run in separate
conduit from any AC wiring; however, it is acceptable to run DC pulser wiring in the same conduit
as AC wiring as long as the requirements outlined in Pulser Wiring are met.
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.
The table that follows shows conduit capacity for rigid, metal conduit with a 50% fill of gas- and
oil-resistant wire. Use this chart as a guideline to determine the proper conduit sizes for the
Gasboy 550A Series dispensing units. When planning the orientation of the wiring runs, follow the
applicable 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.