Not to be picky, but just to help clarity of communication, some terminology as used for electrical power cord connections:
- plug = part with prongs sticking out, on the end of a cord, which goes into a matching socket
- socket or receptacle = part that the plug goes into
- cord connector = a socket made to go on the end of a cord
So the campsite has a receptacle. The 30-amp receptacle found in campsites goes with plugs which match this description:
Originally Posted by Fox hunt
I bought a 30 amp plug /cord but it doesn't fit my trailer plug it is two flat things on an angle and a middle round thing...
This is the NEMA TT-30
style, named for "Travel Trailers" because nothing other than RVs use it, and just called a "30-amp" connection in the RV world.
If you buy a cord with a TT-30 plug (to plug into the campsite) on one end, and the matching connector on the other end, what you have is an extension cord. That doesn't help you if you are trying to replace something which is worn out... it just gives you more reach.
So what is being replaced here? Since the original cord in this case is removable, there must be some connection between the cord that the trailer than can be unplugged. This is not done with a TT-30 connection, because that doesn't lock; instead, a locking connection is used. The normal locking connection is a NEMA L5-30, which twists a few degrees to lock or unlock... and might be what is being described here:
Originally Posted by Fox hunt
... while my trailer plug is three flat things one has a little curl on it.
... but those things are not really flat, they're all curved so they can turn in curved slots, but one does have a bend on one edge.
You can replace the connector on the trailer's end of the removable cord (that's an L50-30 cord connector), such as Marinco Part # 305CRCN.VPK
. I assume it's not the part on the trailer which is worn (because then you wouldn't have bought a cord), but that is replaceable too - it's called an "inlet": e.g.Marinco Part # 301ELCB
(or better picture in Amazon
If you were to replace the entire cordset to get new hardware on both ends, that would be one like Leon linked, with a TT-30 plug on one end to go into the campsite's receptacle and an L5-30 connector on the other end to go into the trailer; I agree the right-angle ends on both ends - not just the campsite end - is an excellent feature. I wouldn't buy a whole cordset to get one new connector, but on the other hand it does save the need to do any wiring work (installing a new connector on the original cord). Certainly don't throw away the original cord - I assume someone will want it if all it needs is one connector replaced.
The twist-locking connections work by plugging it straight in to put the blades in the slots, then turning a bit to lock; turn back then pull to remove. In RV use, they often have that protective boot and threaded ring, which is not part of the connector at all but an addition on the outside for weather protection.
Clear as mud?