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Old 01-21-2015, 10:22 AM   #1
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50 to 20 Amp Adapter

Just purchased a Mighty Cord RV15M50FDT adapter so I could connect my Honda eu2000 to my Silverback 29ik without going through the 50 amp cord and two adapters which work fine, (everything works in RV) but are awkward to use. Problem is, when using the RV15M50FDT, only a few 110 volt items work, such as the microwave and refrigerator on AC. Items such as ceiling fan and TVs do not work. Is there a way I can readily correct this? Thanks.

Philip
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Old 01-21-2015, 10:49 AM   #2
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Welcome to the forum Philip, first of all you are asking a lot from a little 20 amp circuit on the gen. I suggest getting another Honda eu2000 (the companion unit, and 30 amp adapter to connect them together) run both of them with 30 amp output and adapt it to your 50 amp cord this should give you more usage in the TT but you still won't be able to run everything at once (such as the second AC unit). Do a search of the threads in this forum and you can find some tables of amp loads various appliances etc. pull and be able to determine what can be ran at any given time.
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Old 01-21-2015, 10:52 AM   #3
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Your ceiling fan and TVs should work when you are plugged into the Honda. Check the circuit breakers and trip them to off and then back to on. Also I think (not really sure) the ceiling fan is on a GFCI circuit. Find the GFCI outlets with the reset button and push that in. If that doesn’t work then perhaps someone else will have some ideas. All of the 110v appliances in my Silverback work with my Honda 2000, just not all at one time of course.
I’m sure you already know this but the Honda 2000 only produces 13.6 amps so you are limited as to how many appliances you can run at one time.

BTW, welcome to the Forest River Forum.
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Old 01-21-2015, 11:19 AM   #4
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I am careful what electrical items I run at the same on the 13 amps generated from the eu2000. I do expect that individually, everything with the exception of AC should work. (AC might actually work, but there is not enough power to properly run it). When I disconnect the new 50 - 20 adapter and plug into 50 amp shorepower everything now works. So why not with the adapter?
Philip
Thanks for the warm welcome to the forum. We have used our 2015 Silverback 29ik for four months, love the design and problems have been few, readily corrected by our dealer, so we are pleased with our purchase. I think this forum is really informative.
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Old 01-21-2015, 11:29 AM   #5
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If you have a multimeter, check your 50 amps side adapter that you get 120 volts between neutral and each hot (L1 and L2), maybe only one line is hook up. That would be between W and Y.... and then W and X.
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Old 01-21-2015, 11:46 AM   #6
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Quote:
Originally Posted by Philip Rank View Post
Just purchased a Mighty Cord RV15M50FDT adapter so I could connect my Honda eu2000 to my Silverback 29ik without going through the 50 amp cord and two adapters which work fine, (everything works in RV) but are awkward to use. Problem is, when using the RV15M50FDT, only a few 110 volt items work, such as the microwave and refrigerator on AC. Items such as ceiling fan and TVs do not work. Is there a way I can readily correct this? Thanks.

Philip
Philip. it almost sounds like one leg of your 50 amp RV is not being powered from the adapter.

In simple terms, your 50 amp RV consists of 2 legs (L1 and L2) which in reality comes from a 120/240 volt split phase power supply. Inside your RV, some electrical things will run off of the L1 side, and some things are over on the L2 side.

When you use a properly wired adapter, you are actually splitting a single feed ( L1) over to the L2 side.

You might want to see if the adapter is actually outputting this single feed to provide power to both your L1 and L2.

You could just have a bad adapter and it's not providing power to both sides.

EDIT: I was trying to find a pic like Fonzie showed. You can ignore my post as Fonzie has you covered.
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Old 01-21-2015, 12:01 PM   #7
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I agree with WMTire. a 50 AM service has two legs which I would think a typical 20AMP adapter cannot provide. It should only be designed to run one leg and a 50 AMP circuit is a two leg circuit. If it is designed for two, then it cannot possibly provide enough ample power to run all items in your trailer. A 20AMP will provide some items power but it's really not design too run everything otherwise they would have wired the trailer for a 20 AMP connection.

As an example of a more dangerous situation, I have a 30 amp trailer. It is designed for just one power leg. I have the ability to connect a 20AMP plug into it and everything runs. But first off, I am taking a chance that if I try to power something that required more than the 20AMP can provide at once, such as running the fridge and the AC at the same time, then I may damage circuitry within the appliances.
Second, If I did power something on like the fridge and the AC unit, I pop the fuse and the wire gets so hot that it's a fire hazzard.

I have installed the proper 30AMP plug in my garage to eliminate any issues.

So back to your 50AMP service, I'm surprised they make a converter like this and it's probably only "meant" to do things like charge batteries and run lights. You do not want to run high AMP pulling items and limit what you do turn on. Or install a 50AMP service in your garage and then be able to run everything.
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Old 01-21-2015, 12:54 PM   #8
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Quote:
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Fonzie misstated the wiring.

TGR, I don't believe continuity is the issue. As Fonzie correctly stated, he needs to check "voltage" for both of the legs...and make sure that each leg has 120 volts coming thru it. It has to be plugged into a power supply to check voltage. X and Y are your two "hot legs" with W being a shared neutral between the two. The confusion my be that you are only checking for voltage at the female end of the adapter cord.

If there is no voltage, then you might want to unplug the adapter...and change to continuity, and see if something is wrong/broke in the wiring between the male and female ends.

However, if he is powering at least one leg, then I don't think the problem is going to be continuity. It's most likely going to be an internal problem inside the adapter that splits the L1 to the L2.

He can test the unpowered adapter using continuity as you suggested, to make sure there is continuity at the X and Y female end from the male end of the plug, since they should be tied together internally in the adapter. If not, that would indicate a fault somewhere.
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Old 01-21-2015, 12:59 PM   #9
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Quote:
Originally Posted by TGR View Post
Fonzie misstated the wiring.


I just checked my 50A to 15A adapter. Using fonzie's chart above, there should be continuity between the G on both ends of the pigtail, between the W on both ends, and between the unlabeled prong on the 15A plug to both the X and Y on the 50A receptacle. It is the X and Y that are at issue in your problem.


Wmtire explained the reason a missing leg or perhaps a poor connection is your likely problem.
I did not misstated the wiring.
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Old 01-21-2015, 01:08 PM   #10
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A 50A to 20A or 30A adapter is not just the reverse of a 20A to 50A adapter. They are wired differently.
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