Conduit requirements, Thhn/thwn wire areas – Gasboy CFN Series Site Controller III User Manual
Page 27
MDE-4298D CFN Series Site Controller III Installation Manual · September 2009
Page 23
Conduit Requirements
System Layout
Conduit Requirements
The conduit requirements outlined in this section are relevant to all components that make 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.
Gauge
Diameter
Area (sq units)
in
mm
in
mm
18
0.090
2.29
0.007
4.1
16
0.104
2.64
0.009
5.5
14
0.118
2.95
0.011
6.8
12
0.135
3.43
0.014
9.2
10
0.169
4.29
0.022
14.5
8
0.216
5.49
0.037
23.7
6
0.259
6.60
0.053
34.2
4
0.331
8.41
0.086
55.5
3
0.359
9.14
0.102
65.6
2
0.394
10.01
0.122
78.7
1063A
0.417
10.59
0.137
88.4
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 (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 conduits. Poly Vinyl Chloride (PVC) conduits are not acceptable. High voltage AC
power wires and low voltage DC signal wires are recommended to be installed in separate
conduits. However, if AC and DC wires share the conduit, DC wiring must use the cable
specified in the sections,
on
on
“Pulser Wiring and Configuration”
. When AC
wires and RS-485 or RS-422 wires share the same conduit, only the AC wires for the system
and pumps can be used in that conduit.
Wiring between the Fuel Point Reader (FPR) and the Pre-amp junction box is intrinsically safe
and must be run in a conduit with only other intrinsically safe wiring. It cannot be run in a
conduit with AC, DC, RS-485 or pulser wiring, regardless of the cable type used. Refer to
C35628 Fuel Point Reader Installation and Retrofit Instructions Manual for details.
All conduits 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.
Refer to MDE-2713 Universal Distribution Box Installation Manual for conduit and wire
requirements of the Two-wire Current Loop communications to the ICR2. For an overview of
ICR2 Communication wiring, refer to
on
THHN/THWN Wire Areas