Denray Posted October 3, 2013 Report Posted October 3, 2013 What's it mean again when the stove hood lights up the sensor whether the power is on or off? Click to Enlarge 34.96 KB
Chad Fabry Posted October 3, 2013 Report Posted October 3, 2013 It likely means there is no equipment ground.
rkenney Posted October 3, 2013 Report Posted October 3, 2013 What's it mean again when the stove hood lights up the sensor whether the power is on or off You could of found that just as easily by licking your finger and touching it (might not even have to lick your finger, but it's more professional looking that way.)
Denray Posted October 3, 2013 Author Report Posted October 3, 2013 I read that when the power is turned on then that's what that means. If a wire was contacting it then wouldn't you get the same reading when it's off. Like touch hood with left hand, stove with right, then collapse on floor.
rkenney Posted October 3, 2013 Report Posted October 3, 2013 I read that when the power is turned on then that's what that means. If a wire was contacting it then wouldn't you get the same reading when it's off. Like touch hood with left hand, stove with right, then collapse on floor. Not sure what you mean, too many nonspecific its and thats. Chad is probably spot on. Just like when you approach an un-grounded outlet with one of those testers, it shows hot before you even touch the outlet. For a complete diagnosis you need a more specific test. Wiggy, voltmeter, etc. Different inductive testers (brands) have been known to give different results.
John Kogel Posted October 4, 2013 Report Posted October 4, 2013 The hot side of the feeder could be shorting to the hood ahead of the switch or the switch could be shorted. Why I say this is that if the switch is operating correctly with a good 2-wire supply cable, the hood should not be energized.
inspector57 Posted October 4, 2013 Report Posted October 4, 2013 I still call it out either way but a simple and quick (although not 100% safe, reliable, or recommended for documentation) is to touch the hood with your hand while NOT touching any other ground and testing with the non-contact tester. If you still get a voltage indication it is hot. If there is no indication of voltage then it is not bonded and you are just picking up induced voltage, not a direct connection. Again, just a quick and dirty indication, not documentation.
Jim Katen Posted October 5, 2013 Report Posted October 5, 2013 What's it mean again when the stove hood lights up the sensor whether the power is on or off? It means that these sensors are close to useless because they can be so difficult to interpret. When you find yourself wondering what's going on with a range hood in this situation, pull out a multimeter and find out for sure.
Steven Hockstein Posted October 5, 2013 Report Posted October 5, 2013 Do you normally check the hood like this or was it an accident?
hausdok Posted October 6, 2013 Report Posted October 6, 2013 Originally posted by Denray When you find yourself wondering what's going on with a range hood in this situation, pull out a multimeter and find out for sure. Agreed, They're cheap. Heck, you can get one from Harbor Freight for free just by buying a 99 cent V-hanger for your garage wall. Just watch the Sunday Parade supplement to the newspaper for a "7-function multimeter free with any purchase" coupon. ONE TEAM - ONE FIGHT!!! Mike
Denray Posted October 6, 2013 Author Report Posted October 6, 2013 Steven, I had just read something recently about checking them and I was in a funky house. Thank you everyone.
kurt Posted October 6, 2013 Report Posted October 6, 2013 This is where I wish someone would put together a brief multimeter tutorial for flunky morons (like me).
John Kogel Posted October 6, 2013 Report Posted October 6, 2013 Yes the voltage sniffer has its place. It gives you a quick heads up - this is live, or this is picking up stray current from a live circuit nearby. I don't care if some of y'all here call them cheap toys, they are helpful tools IMO. If you bring the sniffer in to a receptacle slowly, you can so test the polarity. The hot side will trigger a response sooner than when you approach from the neutral side. To use the multimeter to measure voltage, one leads needs to be grounded, hopefully at a convenient grounded receptacle, such as the range plug. You need 3 hands sometimes.
Brandon Whitmore Posted October 6, 2013 Report Posted October 6, 2013 If you bring the sniffer in to a receptacle slowly, you can so test the polarity. The hot side will trigger a response sooner than when you approach from the neutral side. I'm sure you already know this, but if you put your finger over the hot or neutral slot, you don't get the readings until the sniffer is in place.
rkenney Posted October 6, 2013 Report Posted October 6, 2013 This is where I wish someone would put together a brief multimeter tutorial for flunky morons (like me). Maybe you just need a tutorial on how to search the web. https://www.google.com/search?source=ig ... Api8OPwwpY Hell they even have a you tube video for those of you still waiting for the movie to come out. Little sense in having tools if you don't know how to use them.
Marc Posted October 6, 2013 Report Posted October 6, 2013 This is where I wish someone would put together a brief multimeter tutorial for flunky morons (like me). What would you like it to explain, besides the sensitivity that Denray experienced? Give me some elements and I'll try to do that. Marc
Denray Posted October 6, 2013 Author Report Posted October 6, 2013 " Little sense in having tools if you don't know how to use them". That's what my wife told me last night.
kurt Posted October 6, 2013 Report Posted October 6, 2013 What would you like it to explain, besides the sensitivity that Denray experienced? Give me some elements and I'll try to do that. Marc A simple tutorial about using multimeters in this thing that we do. (Moderated comment) anything you might offer that was structured in a "MM's for HI's" concept would be neat. Be creative. What things might an HI use a MM for, and a step by step. I use mine for a few odds and ends, but a tutorial related to HI work would be neat.
Jim Katen Posted October 6, 2013 Report Posted October 6, 2013 This is where I wish someone would put together a brief multimeter tutorial for flunky morons (like me). To read voltage: Set the multimeter to the "voltage" setting. Touch one lead to a grounded object. Touch the other lead to the thing you want to measure. Read the voltage on the display. To read resistance: Make sure that the thing you're going to read is not energized. Set the multimeter to the "resistance" or "ohms" setting. Place one lead on each end of the thing you want to measure. Read the resistance on the display. This setting is also good for reading "continuity" to make sure that one thing is connected to another. To read amp draw (in the context of what we do): You'll need a multimeter with a clamp-on ammeter function. Set the multimeter to the "amps" setting. Clamp it around just one wire in the circuit. Read the amps that are flowing through the wire.
kurt Posted October 6, 2013 Report Posted October 6, 2013 Yeah. Like that. This is the sort of thing that would be generally helpful to the brethren. I use mine for a couple things, but it would be kinda cool to have a simple slide show, and this sort of explanation. Pictures and words are how I, and most people, learn.
gtblum Posted October 6, 2013 Report Posted October 6, 2013 Uh oh! Here comes the part where they chop up the thread!
Marc Posted October 7, 2013 Report Posted October 7, 2013 Don't mean to interrupt the entertainment but this is the first 200 words. I'll do more if I'm headed in the right direction and an interest is indicated. Download Attachment: METERSANDSUCH.pdf 48.67 KB Marc
Scottpat Posted October 7, 2013 Report Posted October 7, 2013 Marc's a Southern boy and Katen, well he's just a nice transplanted Yankee!
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