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 Posted: Sun Sep 8th, 2019 11:58 pm
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Steven P Dempsey
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Here is a line up of R&M Iron & Brass. When I plugged in the center fan,it hummed. Then I gave the rotor a spin & got a nice shock. I had inspected the switch & head wire and saw no obvious issues. Any help would be appreciated. It is a LIST 1153 (Gear Back Oscillator) The blade spins freely. A shorted winding in the stator?








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1153 Switch.jpg

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 Posted: Sun Sep 8th, 2019 11:59 pm
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Steven P Dempsey
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 Posted: Mon Sep 9th, 2019 12:00 am
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Steven P Dempsey
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However, this nice 1404 is running great!!


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 Posted: Mon Sep 9th, 2019 12:38 am
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Stan Adams
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You may not have any real problems. I wrote an article a while back about the need to polarize the plug on fans. Induction can also give a jolt. Many fans leak, especially on start up due to induction. Were you on a steel table or were you grounded? Connect an ohm meter to the prongs of the plug & see if you have continuity on the cage or motor case. If yes you have a problem. If no, it may be an induced current.

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 Posted: Mon Sep 9th, 2019 10:33 am
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Steven P Dempsey
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Thanks Stan - - the issue of polarity has always been fuzzy to me. The table top is metal, but I put a rubber mat under the fan whenever I test.

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 Posted: Wed Sep 11th, 2019 12:59 pm
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Henry Carrera
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Steven P Dempsey wrote: Thanks Stan - - the issue of polarity has always been fuzzy to me. The table top is metal, but I put a rubber mat under the fan whenever I test.
If outdoors, it would be a question of what kind of shoes you were wearing, how conductive is the surface that you are standing on, and were you touching anything else. If you could somehow float above the ground or stand on a non-conductive surface, then you would break the earth/ground path and not get shocked. This would hold true even if you have a direct short to the fan frame. Bird on a wire thing.

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 Posted: Wed Sep 11th, 2019 01:50 pm
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David Allen
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Henry Carrera wrote: Steven P Dempsey wrote: Thanks Stan - - the issue of polarity has always been fuzzy to me. The table top is metal, but I put a rubber mat under the fan whenever I test.

If outdoors, it would be a question of what kind of shoes you were wearing, how conductive is the surface that you are standing on, and were you touching anything else. If you could somehow float above the ground or stand on a non-conductive surface, then you would break the earth/ground path and not get shocked. This would hold true even if you have a direct short to the fan frame. Bird on a wire thing.


This is very true. While wearing boots (with rubber soles) I bought a cold drink from a defective Coca-Cola cooler. I noticed nothing wrong. A few minutes later, a person in pool shoes walked up and got the poopoo shocked out of them.

The Coke machine was defective and had a short to ground and no ground connection.

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 Posted: Wed Sep 11th, 2019 03:48 pm
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Steven P Dempsey
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I was wearing tennis shoes standing on dry gravel

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