Several years ago, I replaced the female end of a 30 amp extension cord to one that hooked to a 30 amp outside screw on hook-up. We have visited CGs where passers by have gotten attached to other campers power cords. With a hidden extra cable I felt certain I could sleep with A/C with my health problems.We just purchased a 2017 TT with a 50 amp hookup, so I will replace the old add-on with a 50 amp add-on connection so I can still sleep in the cool.The DENALI has one 15,000 BTU A/C and front vent hole is wired for a second. With the all weather thermal package that it has, we will not add the second A/C.Currently, I am hooked to a 30 amp box, using an adapter to hook to my 50 amp system. Once I get my conversion parts here, I will get out the ohms meter and starting at the 30 amp male plug, I will check to see what leads correspond to the terminals on the plug-in terminals, then hook the wires where indicated. I can't forsee any use for that additional wire. Could I be looking at that wrong?

That additional wire powers half of your RV. So if you connect L1 and L2 together your plan should work.

Yes... connect ground to ground, neutral to neutral, 30 amp hot to both 50 amp hots.Standard adapter does the same. Cord is just a long dog-bone adapter.

ok.. i am NOT clearly understanding your intentionyou can NOT tun a 30 amp cord into a 50 amp corda 50 amp cord has 4 wires that are a larger gauge wireand the 30 amp only has 3 wires, all your doing is creating a long 30amp dogbone adapterif you need a longer 50 amp extension you will have too buy oneif you want to use the 30amp ext to plug the 50amp rv into a 30 amp socketjust use the 30 male to 50 female dogboneand put it between the 30amp cord and the new 50 amp RV cordlike you are nowthe 30 amp dog bone takes (1) hot leg and connects it to the (2) in your 50 amp cordbut you Can NOT take (2) 50amp legs and connect them to (1) 30 amp rated wire in your 30amp cord with a 50amp male on the end of a (3) wire 30amp cordif your not lucky, you could end up with a 100 amp dead short when you tried to plug that inits against code and extremely dangerous

just buy the appropriate dog bone and be done with it.bumpy

As Mr Wizard said, if it is your desire to use your 30 amp extension cord when you need a longer run to a 50 amp circuit, you will not be able to do this. The wires in the extension cord are too small and you will be 1 wire short. When you plug into 50 amp with the cord that came with the RV you will have all the power you need so there would be no need for a 2nd electrical run to the RV so if you are trying to do something else with that extension cord, please let us know. If you need a 50 amp extension cord I highly recommend you buy a 50 amp extension cord.

Converting 30 Amp Ext. Cord To Hook To 50 Amp TT

mailman-ret
Explorer
Jun 26, 2017
Yes, it does now, but when the 50 Amp ends arrive, I will clean the cables back a few more inches and convert it to the 50 Amp spare that I now need. Thanks to all that posted.
Lantley
Nomad
Jun 26, 2017
Dutch_12078 wrote:
mailman-ret wrote:
Dutch, what I previously stated was that being I am a heart patient, I have to insure that I am equipped to go to bed at night hooked to shore power. If I return and our power cord has grown legs, I will have another. I "cannibalized" this cord for our last TT about seven years ago. It no longer has a use in this configuration, so on Amazon I have ordered what you and Lantley have mentioned for just over $26.00 delivered. I asked my initial question just to see if I could get some assistance rather than me later saying OOPS!

Good thinking then, and just be careful of the wiring. It will work fine done as I described earlier, albeit with the standard 30 amp total current draw limitations that I'm sure you're well aware of.

I think I get it, your current cord has a 30 amp twist lock end?
Dutch_12078
Explorer II
Jun 26, 2017
mailman-ret wrote:
Dutch, what I previously stated was that being I am a heart patient, I have to insure that I am equipped to go to bed at night hooked to shore power. If I return and our power cord has grown legs, I will have another. I "cannibalized" this cord for our last TT about seven years ago. It no longer has a use in this configuration, so on Amazon I have ordered what you and Lantley have mentioned for just over $26.00 delivered. I asked my initial question just to see if I could get some assistance rather than me later saying OOPS!

Good thinking then, and just be careful of the wiring. It will work fine done as I described earlier, albeit with the standard 30 amp total current draw limitations that I'm sure you're well aware of.
mailman-ret
Explorer
Jun 26, 2017
Dutch, what I previously stated was that being I am a heart patient, I have to insure that I am equipped to go to bed at night hooked to shore power. If I return and our power cord has grown legs, I will have another. I "cannibalized" this cord for our last TT about seven years ago. It no longer has a use in this configuration, so on Amazon I have ordered what you and Lantley have mentioned for just over $26.00 delivered. I asked my initial question just to see if I could get some assistance rather than me later saying OOPS!
Dutch_12078
Explorer II
Jun 26, 2017
Lantley wrote:
Dutch_12078 wrote:
Lantley wrote:
Dutch_12078 wrote:
My read of the OP is that "time2roll" has it right, and what the OP wants is basically a long 30 amp/50 amp dogbone adapter with the appropriate 50 amp Marinco style connector for his TT, mainly for use as an emergency spare in case his primary 50 amp cord is stolen. Kent and time2roll also have the connections right, in that the single 30 amp hot leg would connect to both of the 50 amp Marinco's hot terminals. The cord would be connected to the TT and plugged into the 30 amp park power outlet.

They sell/ make a 30 amp male to 50 amp twist RV cord. No need to fabricate one unless you have access to free wire the twist lock end is expensive.

He already has an extra 30 amp cord from his previous 30 amp TT. He just needs the 50 amp end for it.

I understand that he already has 30 amp extension cord but why
cannibalize it? It can still be used as a 30 amp extension cord if he needs it.
He could by the end. For $60.00.50 amp twist lock

Or he could just buy it already made up for $15.00 more30 amp male to 50 amp twist RV power cord

Ok, at those price points, I'll agree with you...
Lantley
Nomad
Jun 25, 2017
Dutch_12078 wrote:
Lantley wrote:
Dutch_12078 wrote:
My read of the OP is that "time2roll" has it right, and what the OP wants is basically a long 30 amp/50 amp dogbone adapter with the appropriate 50 amp Marinco style connector for his TT, mainly for use as an emergency spare in case his primary 50 amp cord is stolen. Kent and time2roll also have the connections right, in that the single 30 amp hot leg would connect to both of the 50 amp Marinco's hot terminals. The cord would be connected to the TT and plugged into the 30 amp park power outlet.

They sell/ make a 30 amp male to 50 amp twist RV cord. No need to fabricate one unless you have access to free wire the twist lock end is expensive.

He already has an extra 30 amp cord from his previous 30 amp TT. He just needs the 50 amp end for it.

I understand that he already has 30 amp extension cord but why
cannibalize it? It can still be used as a 30 amp extension cord if he needs it.
He could by the end. For $60.00.50 amp twist lock

Or he could just buy it already made up for $15.00 more30 amp male to 50 amp twist RV power cord
mailman-ret
Explorer
Jun 25, 2017
bumpy, if we don't miscalculate and wake up Allegheny National Forest on the morning of departure to an unwelcome white surprise, I hope we never realize the three times. We were at Harrisburg at the State Horse Show with our kids, and we awoke to nearly 5"s of white powder on Halloween day. I don't plan to have our TT out that late in the future.
Bumpyroad
Explorer
Jun 24, 2017
mailman-ret wrote:
It feels as if a 50 amp TT cable is twice as heavy as a 30 amp cable.

and in the cold, three times as heavy.
bumpy
mailman-ret
Explorer
Jun 24, 2017
Thanks Dutch 12078, I do have a serviceable 30 Amp cord that needs an end, which cost less than $20.00. As in my past experience, 90% of my camping will have me hooking to a 30 amp box. In these instances, I will use the 30 amp cord.

We have an August reservation for a 50 amp site. For those that have been concerned, I will use the 50 amp cable. Our rig with the single A/C will never require the hook-up. In this case, a larger site comes with it.

corvettekent, thanks for your suggestion. I will check this out.

From the passing of a friend, I have been given dog bones (30 to 50, and 50 to 30), and several other attachments. There are those out there that have a special attachment to copper, so the less bobbles that I put in their view, the less they will be inclined to visit my site. Also me being a heart patient, the less I have to drag out to set up, the easier it will be. It feels as if a 50 amp TT cable is twice as heavy as a 30 amp cable.
Dutch_12078
Explorer II
Jun 24, 2017
Lantley wrote:
Dutch_12078 wrote:
My read of the OP is that "time2roll" has it right, and what the OP wants is basically a long 30 amp/50 amp dogbone adapter with the appropriate 50 amp Marinco style connector for his TT, mainly for use as an emergency spare in case his primary 50 amp cord is stolen. Kent and time2roll also have the connections right, in that the single 30 amp hot leg would connect to both of the 50 amp Marinco's hot terminals. The cord would be connected to the TT and plugged into the 30 amp park power outlet.

They sell/ make a 30 amp male to 50 amp twist RV cord. No need to fabricate one unless you have access to free wire the twist lock end is expensive.

He already has an extra 30 amp cord from his previous 30 amp TT. He just needs the 50 amp end for it.

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Converting 30 Amp Ext. Cord To Hook To 50 Amp TT

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