[LHaven]

[Edit: The post this replies to is no longer there. I guess the mods agreed it was spam and removed it.]

There are so many gotchas in this post.

The link isn't to Amazon. The product at the link doesn't have a twist-lock connector, at least not as pictured. Its gauge is 6/8, not 12 (which would be vastly undersized). The manufacturer rates it at 50A not 15, which would be ludicrous for a "50 amp cord." The "100ft extension cord" sold there is really a three-pack of their 36ft cord.

"so you can plug into any standard outlet without worrying about whether it's female or male" makes zero sense. Neither does "you can leave it outside all year long. This will help prevent corrosion and rusting of the metal parts in the weather." (Leaving it inside would always be better than outside.)

Finally, the wattage math is wrong, as a 50A cord carries 240V (2 circuits x 120V), but wattage isn't a useful parameter for a trailer anyway.

Add to all this the observation that it's the poster's first post, and my conclusion is: spam.