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Old 10-30-2008, 09:24 PM   #16
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Originally Posted by Speedy Petey View Post
W - T - F does this have to do with ANYTHING?????
Means the OP is very likely not to hurt himself.

Speaking of WTF, do you realize that you are allowing my post to control your blood pressure?

Are you OK with that?


Last edited by Yoyizit; 10-30-2008 at 09:27 PM.
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Old 10-30-2008, 09:50 PM   #17
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Originally Posted by Yoyizit View Post
Means the OP is very likely not to hurt himself.
After your advice? His chances just skyrocketed.


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Originally Posted by Yoyizit View Post
Speaking of WTF, do you realize that you are allowing my post to control your blood pressure?
Please. Don't flatter yourself. You have NO effect on my BP, I assure you.
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Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.
Answers based on the 2008 & 2011 NEC.
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Old 10-31-2008, 07:14 AM   #18
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Yes, if your ohmmeter can read fractions of an ohm.
If you have #12AWG and you read 1.5 ohms, your dead short is 25' from the breaker, assuming the short doesn't change when 120v is not applied. With #14 the short is 30' from the breaker.
Exactly, and it can help us estimate the distance, much better than risking your life...or your eyes.
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Old 10-31-2008, 11:36 AM   #19
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Exactly, and it can help us estimate the distance, much better than risking your life...or your eyes.
I think my distance numbers are wrong; it's 0.16 ohms for 100' (loop distance) of #12.
That's why you need to pass heavier current to trace short circuits and measure the voltage drop. A 100w bulb will pass ~0.8A, then R = E/I. This short at the end of 50' of Romex would read 0.13V.

The other way is TDR, but that's out of the DIY league.


Last edited by Yoyizit; 10-31-2008 at 03:32 PM.
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