MILSPEC: Never solder AC wiring. Never "TIN" AC wiring.
I have soldered the DC wiring on the running
lights using a "Western Union" splice then solder then heat shrink.
I posted the following in the fuse size discussion concerning inside the camper wiring. Note: The TopHat crimp connector can be used for both AC and DC.
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Wire Nuts:
Using the proper wire nut and taping it to the wire once it has been twisted properly should remain serviceable without any problems however if you really want to do it right, there is a crimp connector that looks like a top hat where you insert both wires in one end and then crimp the other end and everything is contained inside the connector. The connectors are semi transparent with a copper crimp ring inside. Go to the Home Depot or Lowes and look for them in the
electrical department. (See Site Below)
The rule for crimping is:
Crimp once. You never make a second crimp because the second crimp may loosen up the first crimp.
Crimp Tool:
The BEST crimp tool is a Ratcheting Crimping Tool, one that must be squeezed all the way down before it will release. (See Site Below)
WHY:
Because using a cheep tool that does not ratchet may not crimp all the way and you may loosen your grip and the tool may move and you wind up with a less than perfect crimp.
The Crimp Tool
http://www.harborfreight.com/cpi/ctaf/disp...temnumber=97420
The Crimp Connector:
http://www.idealindustries.com/prodDetail....insulated_ideal