It's really winter, isn't it? (g)
I've said elsewhere, but will repeat again, I've pulled sixty pound submersible well pumps out of the well from a depth of 150' on the pump wire, 12Gg., alone. The motor leads are attached to the pump wire via sta-cons and shrink tubing similar to that seen in halekai's photos. And that pulling involves dynamic loading of the splice, not just static loading. And those sta-cons are crimped using just Klein pliers.
I can see why some might prefer the clear shrink tubing, but I prefer the heavy wall black myself. You'll not find the heavy wall at WM or any other marine outlet I've seen.
If you are looking for quality at a good price, you can find the crimp sta-cons and the heavy wall black, as well as the clear, at a well-drilling supply house. The clear often comes in packs of three pre-cut pieces with three sta-cons and will run you about $2.50 retail per pack. The heavy wall black comes in 1 foot lengths or longer at about $4 the foot, retail. Prices do vary widely depending on supplier, so it's worth checking. Sta-con's can be bought for about $5 the hundred.
If you want to make a splice of similar nature, but not use heat, you can purchase "re-usable" shrink tubing that is silicone impregnated. Not all well-drilling supply houses carry it. It has the appearance of the normal shrink tubing upon completion, but does not require shrinking to fit. While initially quite sceptical of it, I found it works quite well, although I've never re-used it. At the cost involved in pulling a pump, it's just not sensible to gain such experience at a customer's possible expense.
Bear in mind that these splices I make are on submersible pumps and they spend their life completely submerged with anything from ten feet to two hundred feet of water over them. I pull them out every day after thirty years of submergence and still doing fine. I'd be lieing if I didn't tell you though, that you can make as good a splice with a sta-con and three wraps of Scotch 88 electrical tape. It will be significantly longer and takes practise and skill to properly execute. It's what we used to use before shrink tube came along.
A great post and practical demonstration, halekai! Now quit fooling around and get the driveway shovelled out! (a vbg)
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.