TENSILE STRENGTH CHART FOR WIRE & CABLE
Tensile strength is a term denoting
the greatest longitudinal tensile stress a substance can
bear without tearing apart or rupturing. PSI = Pounds per Square Inch.
TENSILE STRENGTH CALCULATIONS FOR A SOLID/SINGLE CONDUCTOR:
PSI = F
(D)2 x .7854
Where: F = The breaking force of the specimen in pounds.
D = The diameter of a solid or single strand conductor (inches).
TENSILE STRENGTH CALCULATIONS FOR TWO OR MORE
IN A CABLE:
PSI = d2 x 1/4PI (.7854) x number of strands x 35,000 x 90%
PSI = The breaking strength of the AWG in
pounds is divided by the diameter of a single strand
of wire squared, times the number of strands, times 1/4 PI (.7854), times 90% of the resulting figure
to be used as a nominal tensile strength calculation, for safety. Than multiply by the total number
of conductors for the total tensile strength of the finished cable.
Example 1: a 2 conductor 22(7/30) cable equals
.0001" x .7854 x 7 (strands) x 35,000* = 19.2423,
than take only 90% of that number for safety.
Example 2: a 2 conductor 22(168/44) cable
equals .00004" x .7854 x 168(strands) x 35,000* =
18.4726, than take only 90% of that number for safety.
*The PSI for annealed copper wire.