Uh--- this big question was never asked. What is the application?
BTW- Doubling up the wire is a bad idea if the conductor is solid... it will likely break. Okay if stranded, but still not ideal.
The 3M Silicone impregnated in-line butt splices are ONLY good for 24-26 gauge conductors. We use them all over the audio and telephone side of the plant, but for transitioning to 16 Gauge, I think that I would recommend a solid plastic or bakelite barrier strip, especially if you're managing multiple conductors. I'm using one for my
NMEA Data breakout and distribution. High quality spade fork crimps and a Panduit crimping tool can't be beat. Then coat the whole assembly with clear silicone
grease, and then install a plastic splash guard over the barrier strip
.
Again, the location of the splice and the application are the unknown variable. Your best judgment needs to be applied from there.
He's not a friend of mine (though I wish he was), but Nigel Calder has written a number of phenomenal
books for sailors on this topic, such as
The Boat Owners Mechanical and Electrical Manual. There should be a copy in everyone's ships board library. Hit up Amazon's used book listing.
Good Luck!
Chuck- A
Radio Broadcast
Engineer and Ham in
San Francisco
s/v The Chester P