Join Date: Apr 2006
Thanked 156 Times in 153 Posts
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Re: Proper way to tap into 12VDC wire?
Not really, but if you look at pictures for any "DB9" type clamshell, you'll see there's a small metal clamp that screws over the wires, just inside the shell. That's to prevent them from being pulled out. Similarly, go to any hardware store, look at the boxes and fittings for BX (armored) cable. There's always a wire clamp inside the junction box, and little red plastic chafe liners to go inside the cable ends as well. There are fittings that bolt into the holes in the junction boxes, again with clamps, even though some folks just run a wire through the hole.
Is the clamp overkill? Most of the time, sure. A knot, a ziptie, some type of strain relief is always cheap insurance though. You never know, when the boat gets tossed by a waqke, who's going to grab whatever is nearby. Like a wire bundle.
Digikey and Newark Electronics are good places to get parts, once you wade through the catalogs and ignore any shipping charges. There are a batch 'surplus' suppliers on line as well. Rat Shack? Well, it beats nothing. Sometimes.