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Old 08-02-2020, 10:33 AM   #1
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What extension cord is recommended

Hello.
I recently purchased a Bambi international.
For now I will keep it on my property which is currently under construction.
What type of extension cable do you recommend to hook it up to my temp power pole with 30 Amp breakers?

Thanks so much for your inside.
Nic
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Old 08-02-2020, 10:48 AM   #2
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Nic, welcome to the Airforums.

Need to know the distance to the pole and what you plan on running while using the extension. It would also help a little if you could tell us the voltage at the pole.
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Old 08-02-2020, 11:07 AM   #3
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If it’s 30 amp you should get 10 gauge.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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Old 08-02-2020, 10:47 PM   #4
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thank you. the temp power pole is about 100 feet away.
Its a 100 Amp Pannel and the outlet is on a 30 Amp breaker.
I only run AC and a laptop from inside the Bambi. 10 Gauge extension ok?
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Old 08-02-2020, 11:36 PM   #5
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When the a/c and convertor are running the current draw should be around 20 amps. At 100 ft. 10 gauge copper is the minimum that I would use. I would monitor the voltage in the trailer to be sure you have 110 volts with the a/c on. Also check the cord at the box to see that it's not getting too hot. 100' plus the ~25' trailer cord is 125', that's a long run.

Going with 8 gauge is the safer bet. It's not cheap, especially at 100', but if you are going to be there for an extended time that may be money well spent. That's just my opinion but perhaps others may also chime in here.
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Old 08-03-2020, 01:26 AM   #6
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Originally Posted by Shiny16 View Post
If it’s 30 amp you should get 10 gauge.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Wouldn't you need to know the length of the run?

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Old 08-03-2020, 01:40 AM   #7
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Quote:
Originally Posted by Nicolai View Post
thank you. the temp power pole is about 100 feet away.
Its a 100 Amp Pannel and the outlet is on a 30 Amp breaker.
I only run AC and a laptop from inside the Bambi. 10 Gauge extension ok?
You should consult a competent electrician IMO, and assume that you will -- at some point -- be attempting to draw 30 amps through the cord/cable. Guessing #8 is a bare minimum but maybe #6 or larger [smaller AWG number] might be safer. Yes . . . $$$$$.

Suggest replacing OEM 30 amp shore power cord [#10?] with a shorter 3' version if possible.

You might want to check the Electrical forum, or its sub-forums:

https://www.airforums.com/forums/f37/

. . . and these "extension cord length" search results:

https://www.google.com/search?q=exte...=airforums.com
For example -- https://www.airforums.com/forums/f449/extension-cord-gauge-requirements-207797.html

Good luck,
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Old 08-03-2020, 04:57 AM   #8
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Quote:
Originally Posted by Nicolai View Post
thank you. the temp power pole is about 100 feet away.
Its a 100 Amp Pannel and the outlet is on a 30 Amp breaker.
I only run AC and a laptop from inside the Bambi. 10 Gauge extension ok?
I'M NOT AN ELECTRICIAN.

And you need to add that the converter will be running to power trailer batteries.

Scroll down on this link and use the voltage drop calculator to see the results of what size wire and X length and X amperage draw.

https://www.powerstream.com/Wire_Size.htm

Results of your situation:

Select Copper or Aluminum
Copper

Select American Wire Gauge (AWG) Size

10 AWG

Select Voltage

120 Volts 1-phase

Enter 1-way circuit
length in feet (the calculation is for the round trip distance)
100

Enter Load
in amps
30


Voltage drop
6.162

Voltage at load end of circuit
113.838
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Old 08-03-2020, 05:43 AM   #9
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the guidance provided looks good, I'd add that you need to be sure the 30A branch is 120V (1 hot, 1 Neutral, 1 Ground) and not 220V ( 2 hot, 1 ground). I would also suggest checking the voltage at the pole a few times during the day and early evening. If it is above 118V (use a true rms meter) the standard 10 AWG cords will be fine as others noted. If the pole voltage is lower, you will need to get the pencil out. If you will be there for any length of time, I would carefully measure the exact cord path and get a combination of cords that minimizes total cord length. I say it that way because I assume you will use the provided Airstream cord and at least one other.

Edit: it wouldn't hurt to put a 25 amp draw on the pole and check voltage with a load. Use the trailer if you don't have anything else handy like say three large power tools.
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Old 08-03-2020, 06:23 AM   #10
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Wouldn't you need to know the length of the run?

Yep. I should have said minimum gauge for 30 amps is 10. That’s why the Bambi comes with a 10 gauge power chord.
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Old 08-03-2020, 06:29 AM   #11
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Originally Posted by RivetED View Post
When the a/c and convertor are running the current draw should be around 20 amps. At 100 ft. 10 gauge copper is the minimum that I would use. I would monitor the voltage in the trailer to be sure you have 110 volts with the a/c on. Also check the cord at the box to see that it's not getting too hot. 100' plus the ~25' trailer cord is 125', that's a long run.

Going with 8 gauge is the safer bet. It's not cheap, especially at 100', but if you are going to be there for an extended time that may be money well spent. That's just my opinion but perhaps others may also chime in here.
If its necessary to use 8 gauge wouldn’t you have to replace the supplied power chord? Wouldn’t the 10 gauge 30 foot power chord negate the benefit of an 8 gauge extension chord ?
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Old 08-03-2020, 06:59 AM   #12
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I use an extension cord whenever on SP for an extended time.
I leave the on-board cord rolled up, let the extension take the exposure.

Bob
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Oh....100ft never mind, yer talk'n big bucks.
Best advise, get closer to the pole.
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Old 08-03-2020, 12:53 PM   #13
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An RV shore power cable is in essence, a long adapter. That is, each end has a different type of connector unlike a common household extension cord.

The connector on a 30A cable at the campsite electrical pedestal end is called a TT-30P (it plugs into a TT-30R receptacle on the pedestal) while the connector at the trailer end of the cable is a L5-30R (it plugs into a L5-30P plug on the trailer). The L5-30R is commonly called a twist lock connector.

By definition (mine), in order to be an extension cord, the cord must have matching male and female connector at the ends.

So, one has a choice; extension cord with TT-30P/TT-30R connectors or a cord with L5-30R/ L5-30P connectors. The first type is more commonly available, I’ve even seen them at a Wal-Mart. The second is harder to find, as it is used primarily by boaters for their shore power needs.

The marine type connectors have the advantage in that they can be made waterproof at the connection point but like anything labeled marine, you need to add more dollar signs to the price.

Now to make things even more complicated, a new connector, called the SmartPlug, has been created as an improvement to the marine L5-30R/ L5-30P twist-lock connectors (SmartPlug Inc. claim, not mine). Airstream even sells this but I’m not sure if one can have the trailer connector and associated cord installed at the factory as part of the initial assembly.





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Old 08-03-2020, 01:17 PM   #14
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If you are planning to store your AS on your property after the house is built, could you purchase wire that could be eventually used to wire a permanent 30 amp receptacle. I would think #8 wire would be sufficient. You could use underground feeder cable and wire it temporary to the rv receptacle that you would use later as a permanent receptacle. Keep in mind that electricians usually think of 240 volts when they see a 30 amp receptacle (E.i. dryer receptacle). Rv 30 amps are 120 volts.
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Old 08-03-2020, 04:45 PM   #15
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If its necessary to use 8 gauge wouldn’t you have to replace the supplied power chord? Wouldn’t the 10 gauge 30 foot power chord negate the benefit of an 8 gauge extension chord ?
No, at least not all of it. The voltage would not drop as much over the length of 100' of 8 gauge wire as it would over the length of 100' 10 gauge wire. So the voltage would still be higher when it gets to the supplied 10 gauge power cord. That doesn't mean that having everything 8 gauge wouldn't help.
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Old 08-03-2020, 07:29 PM   #16
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No, at least not all of it. The voltage would not drop as much over the length of 100' of 8 gauge wire as it would over the length of 100' 10 gauge wire. So the voltage would still be higher when it gets to the supplied 10 gauge power cord. That doesn't mean that having everything 8 gauge wouldn't help.
That makes sense, Thanks
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