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Alan_Hepburn

San Jose, Ca, USA

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Posted: 08/17/19 01:28pm Link  |  Quote  |  Print  |  Notify Moderator

12th Man Fan wrote:

Before you have this done make sure the electrician knows what you need. It is not a normal 220V circut it is two 110V.

There have been several posts with pictures on this issue. If you install the wrong one it can cause severe damage to you rig.


Oh geez - here we go again...


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2oldman

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Posted: 08/17/19 01:29pm Link  |  Quote  |  Print  |  Notify Moderator

Op is gone.

MEXICOWANDERER

las peƱas, michoacan, mexico

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Posted: 08/17/19 09:01pm Link  |  Quote  |  Print  |  Notify Moderator

I don't blame him.

Can I describe how to parallel a high voltage bank of transformers by testing for additive or subtractive polarity? My tip about 50 amp stove receptacle and connection should have steered him in the correction direction. The 1,2, N and green earth ground labeling inside the plug should be Dick & Jane to any legit electrician

myredracer

Langley B.C.

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Posted: 08/18/19 04:37am Link  |  Quote  |  Print  |  Notify Moderator

OMG... I wish people would stop referring to "phases" in reference to 120/240 volt circuits and services. In the elec. industry, the two hot legs are always referred to as simply line 1 and line 2. See diagram below.

To the OP, (if he comes back) I would not ignore voltage drop in the circuit if wanting the full 50 amps available (as opposed to just needing to run converter, fridge and other light loads). That would include overall length of all wiring from RV panel all the way back to the panel in the house. A calc. should also consider actual voltage at the house's panel. It is possible that heavier ga. wire is needed, but probably okay.

CA Traveler wrote:

3 phase for residential and CG's??? Yea right that will happen right after the US switches from 120V to 240V. The UK did that right with 220V and 50Hz.
RV parks are permitted to be connected to 3-phase 120/208 volt services if the secondary of the transformer is a "wye" configuration. The two hot legs are 120 degrees apart and referred to as phase A & B (or A & C or B & C) and the voltage from the neutral to a phase is 120 volts. See diagram below. Since it's uncommon for RVs to have 240 volt appliances, the reduced voltage of 208 doesn't affect anything. 120/208 volt services in CGs aren't very common but they are out there and you'd never know unless you used a voltmeter.

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Lynnmor

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Posted: 08/18/19 07:48am Link  |  Quote  |  Print  |  Notify Moderator

myredracer wrote:

OMG... I wish people would stop referring to "phases" in reference to 120/240 volt circuits and services. In the elec. industry, the two hot legs are always referred to as simply line 1 and line 2.


When I see the word "phase" in this type of discussion, I quit reading right there because no good information is forthcoming.





road-runner

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Posted: 08/18/19 10:04am Link  |  Quote  |  Print  |  Notify Moderator

Quote:

OMG... I wish people would stop referring to "phases" in reference to 120/240 volt circuits and services.
You might have a tough time with this. For examples, I used google to search for "120/240 volt circuits and services", and 4 of the first 5 hits talked about phase. My similar thing is that I wish people would stop bringing up calories when I go for the cookies or chips.


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DrewE

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Posted: 08/18/19 12:01pm Link  |  Quote  |  Print  |  Notify Moderator

Lynnmor wrote:


When I see the word "phase" in this type of discussion, I quit reading right there because no good information is forthcoming.


I hope that's only if it's in connection with the number "two". Last time I checked, "single phase" and "split phase" are perfectly valid descriptions of typical north American household electric service, and they both have the word "phase" in them. [emoticon]





Lynnmor

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Posted: 08/18/19 12:35pm Link  |  Quote  |  Print  |  Notify Moderator

DrewE wrote:

Lynnmor wrote:


When I see the word "phase" in this type of discussion, I quit reading right there because no good information is forthcoming.


I hope that's only if it's in connection with the number "two". Last time I checked, "single phase" and "split phase" are perfectly valid descriptions of typical north American household electric service, and they both have the word "phase" in them. [emoticon]


You may have missed "in this type of discussion". [emoticon]

myredracer

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Posted: 08/18/19 01:20pm Link  |  Quote  |  Print  |  Notify Moderator

road-runner wrote:

Quote:

OMG... I wish people would stop referring to "phases" in reference to 120/240 volt circuits and services.
You might have a tough time with this. For examples, I used google to search for "120/240 volt circuits and services", and 4 of the first 5 hits talked about phase. My similar thing is that I wish people would stop bringing up calories when I go for the cookies or chips.
I spent a career as an EE in the construction biz and can tell you it's always been line 1 & line 2. Go look at a 120/240 volt panel, meter base or fused disconnect switch somewhere and see what the labeling says on it. A 120/240 volt circuit/service is commonly called "single phase" but each hot leg is never referred to as a phase.

Go by what internet "pros" say if you want tho...

road-runner

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Posted: 08/18/19 03:22pm Link  |  Quote  |  Print  |  Notify Moderator

You're totally right about the L1 and L2 labeling, and I have to admit for wiring the various 120/240 components you just have to make the right interconnections and not really know what's flowing in the wires. Where did phases come into the thread? I think it started with two comments that "it" is actually two 120 volt circuits. A risky oversimplification, IMO. Then post 19 asked an innocent question about connections and phases, which falls cleanly under the two 120 volt circuits umbrella. That's when the bottom fell out with a mix of correct and incorrect explanations related to phases. Looking from the other end of the EE spectrum, the low-level circuit end, I have a hard time viewing the 120/240 volt service as anything but phase relationships.

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