12 pin plugs V 7 pin

x2
Just fit both. Wire them in parralell so you can use which ever one you need to.

I've been using the 12 pin on the Ultimate Camper Trailer now for almost 12 years. I also have a box trailer with a flat 7 pin plug and it fits straight into the top half of the 12 pin plug.

I too only use 2 of the bottom row of larger pins on the 12 pin plug....to charge the twin batteries in the camper. The cables go via an Arrid Twin Charge (a primitive version of a DC to DC charger....there are much better options available these days but mine still works quite okay). Because the power is going to the DC to DC charger, I don't need to carry huge amperages and the 12 pin plugs copes quite well with the current.

So, Sue, I suggest you use the 12 pin female plug and a suitable (ie: flat) 7 pin plug on your box trailer. Too easy.

We have a similar set up to Roachie on our van.and works very well.

Hi Tony,

Very suprised you had heat buildup in your 12 pin. I have used a 12 pin for years running some heavy loads at times and never had an issue. Do you know if one of the large pins was used for the earth? If only a heavy +ve cable was fitted and the standard earth on the 7 pin side used, then this may have been a cause. My 12 pin is rated for 45A, very similair to the common 50A anderson size most often used.

Cheers

Captain

Hi Tony – I had similar problems
I had a 12 pin flat plastic and a small 7 pin for a couple of years but they caused me a bit of grief.
Possible due to the fact that I put them through water and they were subjected a bit of dust.
I wouldn’t use anything but the large 7 pin plug (Mercedes used to fit them to their vehicles) – a much more substantial unit. If you need more than 7 pins use two plugs.

And, if you make a set of jumper leads to hook into them, its a lot easier to help your mates who leave there lights on.

Well maybe it does for a small one but my van came with a 6 B &S cable to power the fridge so I guess they wouldnt put it in if something cheaper would do.

a 6 B& S wont fit in a 12 pin connector as I think the heaviest would be about 6mm which is a lot lighter than mine

The 12 pin amp rating must also vary with the brand, my 12 pin has a 45A rating (well the bottom 5 pins anyway). Have used a 12 pin setup for years and have found it very convinient, ended up changing my Camprite to this from a 7 pin and anderson plug setup it originally had.

Cheers

Captain

Paulnsw you're dead right
Get the quality stuff first off – It saves money and grief in the long run.

I have purchased a Conqueror UEV490 which is due mid Feb and it uses this


Haevy Duty 7 pin plug

might be worth a look

Rgds
K.A

Looks good How much and how many corrugations will it last do you reckon.

LOL

How much?? - dont know it is included in the price of the Conqueror

Will it survive the corrugations? - it is in use now with the Conqueror UEV490 - I havent heard any bad reports - have you?

I have the unit at home waiting to install on my Nissan and I can tell you it is a REAL struggle to pull the 2 1/2's apart - and I am a failrly strong person

Did you take the time to look at the videos???

It states that the magnetic connection can withstand a pull of 25Lbs (11.3kg) which seems a lot to me

Have now and it looks good but I bet its more than the $23 for pair of 7 pin large LOL.

And useless when you want to tow anything else. Like all the wanky expensive trailer couplings when a 50mm ball would do the job admirably.
Be interesting to know what sort of current they claim. I wouldn't use one if you gave it to me.

"And useless when you want to tow anything else." - that is why you would (as I intend to do) wire it in tandem with the tradiotional style 7 pin plug that si already on my Patrol

"Like all the wanky expensive trailer couplings when a 50mm ball would do the job admirably." - Pual this is connection for the lights and brakes, nothing to do with the towball

"Be interesting to know what sort of current they claim" - not sure, but it is also for controlling the electrcic brakes on the CT. I am no auto electrcian but in the detruction manual it says " This plug is designed for use in the applications requiring no more than 36 volts"

"I wouldn't use one if you gave it to me." - You havent seen one, know next to nothing about them but you are agin them - good to see open mindiness is alive and well. Obviously this product isnt for you then is it?