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Old 12-10-2012, 10:20 PM
Wet_Boots's Avatar
Wet_Boots Wet_Boots is offline
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Join Date: Mar 2005
Location: metro NYC
Posts: 44,750
You can get effective resistance readings with all the zone wiring still in place, because the controller triacs won't pass through the minute amount of voltage emanating from an ohmmeter of the modern solid-state variety.

And it's still worth having a clamparound that leaves all the wiring in place - saves time.
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