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Pulling Wires for Probes and Sensors Probe and Sensor Conduit Installation <br /> Buried Rigid Conduit <br /> The preferred method,especially in new sites before driveway surfaces are paved,is to <br /> pull probe and sensor wiring through buried 1/2"rigid conduit[Figure 6]. <br /> probes\pc nduit.eps Splice Closure <br /> Seal-Off <br /> Rigid Conduit <br /> Cord grip seals <br /> d o d u d o c d a o ,c u ° °a o o <br /> a P a P. a P a 94 P a PJ,d , �►d e t t7/c- e <br /> tl Epoxy seal per NFPA spec <br /> 1/2"rigid conduit(to console) <br /> Weatherproof junction <br /> box with 1/2-inch N.P.T. <br /> threads(16 Cubic inch <br /> —— ——— minimum) <br /> Figure 6. Example Probe Wiring Run in Buried Rigid Conduit <br /> Pulling Wires for Probes and Sensors <br /> Pull two or three conductors(as required)of color-coded#14-18 AWG stranded <br /> copper wire between the console and the junction box at each probe and sensor <br /> location(do not gang wires together,i.e.,splicing all piping sump sensor+ wires <br /> together to run one wire back to console).Use single lengths of wire with no splices to <br /> ensure optimum signal strength. <br /> CAUTION: Since wires for multiple sensors may enter the console through a <br /> single conduit, it is recommended that you use a different color-code for each <br /> wire or individually mark each wire to identify sensor inputs. Also, if the <br /> intrinsically safe wires enter the building in a wiring trough, only Veeder-Root <br /> intrinsically safe wire can be in the trough. Keep all low power (intrinsically <br /> safe) wiring isolated from high power wires in all wiring troughs. <br /> 26 <br />