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Old 12-27-2015, 09:33 AM   #11
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Originally Posted by bob caldwell View Post
Nice pic..
I have found that a picture (or valid source) is worth 1000 assertions ...


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Old 12-27-2015, 09:56 AM   #12
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That is so true......easier to look than read

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Old 12-27-2015, 10:23 AM   #13
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If you are running your space heater on the 1500 watt setting, run at the 750 watt setting. Feel the plug end at the outlet, is it warm to the touch? Feel the cord where it goes into the post outlet, if warm, look at the plug and terminals, do you see any evidence of plastic deformation which is a pretty good indicator you need a new plug end. Are you using the dogbone 30A to 15A adaptors? Same holds true, they can be damaged by overcurrent draw too
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Old 12-27-2015, 11:41 AM   #14
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Is the electric water running with the heater?
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Old 12-27-2015, 11:51 AM   #15
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Originally Posted by Herk7769 View Post
As Flybob said, this could be a campground issue.

Low campground voltage is not just a "peak of summer" issue, but with everyone running space heaters (in some cases multiple ones) aluminum supply wires can be over tasked reducing delivered voltage.
That picture makes a lot more sense than some of the stuff my old instructors used to explain how it worked.
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Old 12-27-2015, 06:07 PM   #16
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I have always taught basic electricity with a plumbing analogy, but I wish I had thought of that diagram.

And the classic ohms calculator triangle is a great tool.

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Old 12-27-2015, 06:18 PM   #17
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Actually, it's E/I/R.
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Old 12-27-2015, 06:46 PM   #18
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Originally Posted by bubbles View Post
Actually, it's E/I/R.

Truism- it stands for "electromotive force", hardly used in industry but Ohms isn't around anymore! Voltage usage more practical term.

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Old 12-29-2015, 05:41 AM   #19
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Originally Posted by Bluepill View Post
I have always taught basic electricity with a plumbing analogy, but I wish I had thought of that diagram.

And the classic ohms calculator triangle is a great tool.

I see this a Lot,but on these Forum's it's (I RV)! Youroo!!
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Old 01-02-2016, 06:28 PM   #20
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There is always voltage drop when current flows through a wire. A two to four volt drop is okay on a 15 amp circuit with a 12 amp load. You shouldn't be worried about a fire in this case. The 15 amp breaker will protect the circuit. Even if you had really low voltage, such as 100 volts, it wouldn't case a problem with a resistive load such as an electric heater. You'd just have less current and would get less heat. Low voltage is death on a motor load such as your A/C and on some electronics.

What are you plugged in to? A 15 or 20 amp receptacle? Are you using an extension cord? What length and wire gauge? How many feet of wire feed the receptacle from the breaker? Any of these could be responsible for some of the voltage drop.

At home I have a 30 amp receptacle, use a 50 foot 10 AWG extension cord and, of course, the coach's 30 foot 10 AWG cable and get about a 4 volt drop when I use an electric heater or the electric water heater.

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