17
Probe and Sensor Conduit Installation
Wiring Run Methods
Two wiring run methods are commonly used for probes and sensors - Wiring pulled through buried, sealed 1/2”
conduit; or direct burial cable. NOTE: PVC conduit is an acceptable alternate where accepted by local codes [ref.
“National Electrical Code Compliance” on page 2 for more detail on cable requirements].
BURIED RIGID CONDUIT
The preferred method, especially in new sites before driveway surfaces are paved, is to pull probe and sensor
wiring through buried 1/2” rigid conduit [Figure 15].
Pull two or three conductors shielded cable (as required). Individual wires should be color-coded between the
console and the junction box at each probe and sensor location (do not gang wires together, i.e., splicing all sump
wires together to run one wire back to console). Use single lengths of wire with no splices to ensure
optimum signal strength.
Figure 15. Example Probe Wiring Run In Buried Rigid Conduit
WARNING
Probes and sensors operate in areas where flammable liquids and explosive vapors
may be present.
Improper installation may result in fire or explosion causing serious injury or death.
Practice the following:
1. Read thoroughly and follow the instructions shipped with each probe and sensor.
2. Probe and sensor wiring conduit must not contain any other wires.
3. Probe and sensor wiring and conduits must enter the console only through their
designated areas.
4. Power and communication wires must not enter the intrinsically safe
compartment of the console.
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