Introduction
National Electrical Code Compliance
3
National Electrical Code Compliance
The following information is for general reference and is not intended to replace recommended National Electric
Code (NEC) procedures. It is important for the installer to understand that electrical equipment and wiring located
in Class I, Division 1 and 2 installations shall comply with the latest appropriate Articles found in the National
Electric Code (NFPA 70), the Code for Motor Fuel Dispensing Facilities and Repair Garages (NFPA 30A), CEC
codes and all applicable local codes.
PROBE- AND SENSOR-TO-CONSOLE WIRING
Wire Type
To ensure the best operating systems available, Veeder-Root
REQUIRES
the use of shielded cable for all probes
and sensors regardless of conduit material or application. In these installations, shielded cable must be rated less
than 100 picofarad per foot and be manufactured with a material suitable for the environment, such as Carol™
C2534 or Belden™ 88760, 8760, or 8770.
Note: Throughout this manual, when mentioning any cable or wire being used for probe and sensor to console
wiring, it will be referring to shielded cable.
Wire Length
Improper system operation could result in undetected potential environmental and health hazards if the probe- or
sensor-to-console wire runs exceed 1000 feet. Wire runs must be less than 1000 feet to meet intrinsic safety
requirements.
Wire Gauges - Color coded
Shielded cable must be used in all installations. Sensor-to-console wires should be #14-#18 AWG stranded
copper wire and installed as Class 2 circuits. As an alternate method when approved by the local authority having
jurisdiction, #22 AWG wire such as Belden 88761 may be suitable in installations with the following provisions:
• Wire run is less than 750 feet
• Capacitance does not exceed 100 pF/foot
• Inductance does not exceed 0.2
H/foot
AC POWER WIRING
Wires carrying 120 or 240 Vac from the power panel to the console should be #14 AWG (or larger) wire for line,
neutral and chassis ground (3); and 4 sq. mm, rated for at least 90°C, for barrier ground.
DC POWER WIRING
Wires ca24 and +5 Vdc from the DC power source to the console should be #14 AWG wire. For barrier
ground, 4 sq. mm wire, rated for at least 90°C.
