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18.104.22.168. Solder shall not be the sole means of
mechanical connection in any circuit. If soldered, the
connection shall be so located or supported as to
minimize flexing of the conductor where the solder
changes the flexible conductor into a solid conductor.
EXCEPTION: Battery lugs with a solder contact
length of not less than 1.5 times the diameter of the
NOTE: When a stranded conductor is soldered, the
soldered portion of the conductor becomes a solid
strand conductor, and flexing can cause the
conductor to break at the end of the solder joint
unless adequate additional support is provided.