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Low Earth Orbit
Lighting & Electrical
Electrical Riddle
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<blockquote data-quote="John Roberts" data-source="post: 30907" data-attributes="member: 126"><p>Re: Electrical Riddle</p><p></p><p></p><p> </p><p>Take your victories where you can.... I don't claim to know everything... </p><p></p><p>Your riddle is too difficult for me. </p><p></p><p>Both main legs measure 120V to ground/neutral but some lights are dim and some things don't work. Not very likely to both be dim "and" measure 120V at the same time, so apparently some inconsistency in the voltage measurement. Perhaps something like a loose wire that introduces series resistance that meters OK with a high impedance meter, but drops voltage when connected to actual load. </p><p></p><p>Both hots measure 0V across each other... This is also inconsistent with my understanding of typical house wiring. If these measurements are made at the drop into the panel something is seriously wrong. If measured away from the panel could be anything. Both pairs swapped could have 0V on both hots, but wouldn't dim lights. The dryer and stove sure wouldn't work. </p><p></p><p>nah... Too hard for me,,, you win... </p><p></p><p>JR</p></blockquote><p></p>
[QUOTE="John Roberts, post: 30907, member: 126"] Re: Electrical Riddle Take your victories where you can.... I don't claim to know everything... Your riddle is too difficult for me. Both main legs measure 120V to ground/neutral but some lights are dim and some things don't work. Not very likely to both be dim "and" measure 120V at the same time, so apparently some inconsistency in the voltage measurement. Perhaps something like a loose wire that introduces series resistance that meters OK with a high impedance meter, but drops voltage when connected to actual load. Both hots measure 0V across each other... This is also inconsistent with my understanding of typical house wiring. If these measurements are made at the drop into the panel something is seriously wrong. If measured away from the panel could be anything. Both pairs swapped could have 0V on both hots, but wouldn't dim lights. The dryer and stove sure wouldn't work. nah... Too hard for me,,, you win... JR [/QUOTE]
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