I recently stacked my clothes dryer on top of my washer and the cable of my dryer is now too short to reach its outlet. I'd like to extend the cable so that it can. Swapping the cord for a longer one isn't an option because the dryer uses a proprietary cable that's only available in one length. The dryer and cable are the same as the ones in this question. For reasons of hassle and expense, I want to avoid moving the outlet.
I only need an extra foot of two of cord, so I'd ideally like to purchase a short extension cord. Unfortunately, short dryer extension cords (1-2 feet) don't seem to exist.
Searching on Amazon and online, I can see three options. My question is, which of these is safest, and why?
Buying a 10-foot extension cord (such as this one). This length seems to be the most readily available, but this solution would involve having many feet of excess cable coiled behind the dryer.
Buying a 3-foot Y-splitter (such as this one). I'd only be using one end of the Y; no second appliance would ever be plugged in. Despite involving an extra unused female connector, I feel better about this solution because it involves less cable. (is this feeling justified?)
How might these three solutions be ranked in terms of their safety and/or legality, and what would be the reasons for the rankings?
Also, comments have suggested swapping the dryer cord for a longer one. Though not possible in this case, in principle why would this approach be safer than using an extension cord?