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Home > Home & Garden > Electrical & Lighting   »   Light switch shorts out circuit breaker

 
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Old Oct 30, 2007, 07:29 AM
cupnoodle
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Light switch short out circuit breaker

Sorry!!!
Wrong category.

This is mighty dump of me to begin with. I was switching my two switches left to right and the metal part of the switch touched the positive screw. Yes. I did not switch off the circuit breaker. I thought it was no big deal because I was just flipping them around without doing anything else to it. I was, wearing a thick glove tough.

Anyhow! Turned the circuit breaker back on and the light works. But, the circuit trips every time I turn the light switch off.
Anyone have any idea?

Thanks in advance!!!

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Old Oct 30, 2007, 08:22 AM   #2  
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Light switch shorts out circuit breaker

This was mighty dump of me to begin with. I was switching my two switches left to right and the metal part of the switch touched the positive screw. Yes. I did not switch off the circuit breaker. I thought it was no big deal because I was just flipping them around without doing anything else to it. I was wearing a thick glove though.

Anyhow! Turned the circuit breaker back on and the light works. But, the circuit breaker trips every time I turn the light switch off.
Anyone have any ideas?

Thanks in advance!!!
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Old Oct 30, 2007, 09:48 AM   #3  
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Shorting usually occurs when turning on, not Off. First thought is someone installed a three way switch in place of single pole switch. Not a problem, If I don't have Single pole switch on truck, I use three way switch to save time. However, when you turn off, it may supply power to unused screw, and if at ground potential, it will short when turning Off.
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Old Oct 30, 2007, 10:22 AM   #4  
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It is a three way switch. I was just a knob head that's all that made the edge of the ground touch the positive which trips the circuit breaker. After that, everytime I turned off the light switch, the circuit breaker trips too. You think I might have fried something else? '_'

Thanks!!!
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Old Oct 30, 2007, 10:53 AM   #5  
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DEF:

Pole: The number of distinct things that are switched, the common terminals
SP, Single Pole, 1 terminal switched
DP Douple Pole, 2 terminals switched
3P, 3 terminals switched
4p, 4 terminals switched

ST, single throw; two terminals total
an SPST toggle/slide switch is a Single Pole Single Throw switch with
two terminals total
A more concise way to write this is Off-None-On.
An SPDT momentary toggle/slide switch is Off-None-(On)

A 3PDT switch with the two ends momentary and the center off is (ON)-OFF-(ON)
This would have 9 total terminals on the switch.

You can concisely describe the switch in the latter notation, but nevertheless the other notation is still with us.

Relays are best described by a "Form X contacts". See WikiAnswers - What is form C contact

The -NO and -NC are Normally Open and Normally Closed respectively.
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Old Oct 30, 2007, 11:05 AM   #6  
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Thank yOu KeepItSimple! I'm begining to understand it now.

Does anyone else have a simple way to fix this problem? Should I buy a new switch?
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Old Oct 30, 2007, 11:35 AM   #7  
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The unused screw or a wire attached to it is touching something grounded, perhaps the ground wire. If there is a wire connected to it, disconnect it. If a bare wire is touching it, bend it out of the way. Going and buying a SPST would also solve the problem, but you don't need to.
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Old Oct 30, 2007, 03:45 PM   #8  
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I would advice to leave the breaker off. Take off the cover plats and look at the wiring. See if you can find a loose connection, burnt markings on the wire or the side of the switch.

Just for the record I'm not an electrical expert and I'm sure someone with more experience will come around and answer your question more throughly
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Old Oct 30, 2007, 03:48 PM   #9  
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Switches have a slotted hole and you can move it from side to side to compensate for things not being quite level and to get the edges from hitting the side of the box.

Make sure all the unused screws are screwed in tightly.

Wirenuts, where the insulation of the wires has been stripped too far are another possibility.

Pull the switch out of the box and use it carefully. I'll bet it won't trip.
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Old Oct 30, 2007, 03:54 PM   #10  
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That makes a lot of sense. I will look at it carefully tonight. Thank you so much guys for taking the time to help out others who are in need.
I appreciate all the comments!

Many blesses and lots of warm noodle for everyone in the cold winter!!!
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