Any rope or steel cable will fail if it is worn out.
Always inspect your rope.
Never use the nominal,tensile or break strength listed for a rope or steel cable as the working load limit.*
There are many other safety factors to consider in the application and use of steel cable or wire rope. For more information, you can consult the Cordage Institute’s International Guideline on the Safer Use of Fibre Rope available here.
*A safe “Working Load Limit” or WLL is determined by dividing the nominal strength of a rope by an appropriate design factor. For example: A factor of 10 to 1 would mean a rope with a minimum break strength of 30,000lbs would have a WLL of 3,000lbs.