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irritation
06-24-2008, 08:43 PM
New account... zones 4 and 6 are running at the same time... controller checks out good... valve box wiring is good. Somewhere along about a 300' foot run of 18-7 multistrand the yellow and green wires are touching. I used my locator to trace the wires and dug up a few places where I thought they may have been nicked... no luck.
Whats the easiest way to find the nick?

FIMCO-MEISTER
06-24-2008, 08:54 PM
New account... zones 4 and 6 are running at the same time... controller checks out good... valve box wiring is good. Somewhere along about a 300' foot run of 18-7 multistrand the yellow and green wires are touching. I used my locator to trace the wires and dug up a few places where I thought they may have been nicked... no luck.
Whats the easiest way to find the nick?

Yiii those are always toughies. If the wire is exposed a fault finder may do it. Progressive 901

Wet_Boots
06-24-2008, 09:19 PM
You did do resistance measurements to confirm the wires are touching?

irritation
06-24-2008, 09:25 PM
You did do resistance measurements to confirm the wires are touching?
Yes, there is no doubt about it.

Wet_Boots
06-24-2008, 09:38 PM
Hmmmm, I wonder what would happen if you disconnected the solenoids, and the zone wires from the controller, and did a trace, with the signal connected to the 4 wire, and the 6 wire being grounded. Might you get a null along the shorted run of cable, and a clear signal after you pass the short?

Shawn Perkins
06-24-2008, 09:40 PM
Doubler should work great

irritation
06-24-2008, 09:44 PM
Doubler should work great

Thanks, but no thanks.

duwaprod
06-24-2008, 09:54 PM
One of our Irrigander irrigation expanders would solve the problem if you simply can't find the short circuit. We have had many customers use an Irrigander expander to bypass a broken wire in a cable. The Irrigander expanders allow direct control of each valve so they do not have the limitations of the Doubler.

--Don

londonrain
06-24-2008, 10:08 PM
Progressive 2003 Pulser Ground Fault Locator

Wet_Boots
06-24-2008, 10:14 PM
Progressive 2003 Pulser Ground Fault LocatorWell, yeah, and any other number of similar rigs, but I wonder what the trace I suggested would reveal.

londonrain
06-24-2008, 10:51 PM
Well, yeah, and any other number of similar rigs, but I wonder what the trace I suggested would reveal.It would reveal the wire path of both the #4 and #6, since they are touching....by using the #6 as a ground would make no difference.... I have done what you suggested on a cut wire, I used the common as the trace and the cut wire as the ground...

Wet_Boots
06-24-2008, 11:15 PM
And your two wires were touching at some unknown point in the field?

londonrain
06-24-2008, 11:52 PM
And your two wires were touching at some unknown point in the field?no only the field wire was cut and the common was good....

FIMCO-MEISTER
06-25-2008, 06:19 AM
Here was a doozy Henry nailed yesterday with the fault finder. Under a drainline. They twisted the cut wires together and buried with no caps on.

WalkGood
06-25-2008, 10:03 AM
New account... zones 4 and 6 are running at the same time... controller checks out good... valve box wiring is good. Somewhere along about a 300' foot run of 18-7 multistrand the yellow and green wires are touching. I used my locator to trace the wires and dug up a few places where I thought they may have been nicked... no luck.
Whats the easiest way to find the nick?


Would it have helped, if where you dug up the wires you cut the wires in question and then run a new trace in both directions to find the original short?

Just thinking out loud....:dizzy: