Hard-drawn conductors for overhead transmission and distribution lines, as grounding connections in circuits, and grounding for machinery or equipment.
What is meant by hard drawn copper wire?
When metal is cold worked or formed it becomes work hardened or strain hardened. Copper conductors go through a considerable amount of work hardening as the copper rod is drawn down through ever decreasing die sizes until the required conductor dimension is achieved. Copper in this state is known as hard drawn copper.
What is the difference between hard drawn and soft drawn copper?
Soft copper is hard drawn copper that has been heated and annealed. Soft copper has an ultimate Tensile strength of about 32000psi . Hard drawn copper Tensile strength can vary from about 45000psi to 55000psi. Hard wire is stiffer and generally not suitable for wiring except in straight bus applications.
What does hard drawn wire mean?
Definition of hard-drawn : drawn so as to produce great hardness and strength —used especially of copper wire and tubing.
What is the difference between annealed and drawn copper?
Hard drawn copper has significantly higher tensile strength than soft annealed copper and is used as overhead wire whereas the soft annealed copper is flexible and has somewhat improved conductivity over hard drawn copper conductor.
What is drawn copper?
Hard drawn copper is simply soft copper wire that has been reduced in size by pulling it though a series of dies… this is called drawing…and the copper becomes harder and stonger as it is drawn, thus hard drawn.
Is Soft drawn copper annealed?
The term “soft drawn” explains it pretty well, because copper is solid but soft enough to bend and wrap around corners. It is simply shaped and often annealed for durability.
What is soft drawn copper?
Soft drawn bare copper wire is the most popular version and probably what you'll find when searching for bare or solid copper. The term “soft drawn” explains it pretty well, because copper is solid but soft enough to bend and wrap around corners. It is simply shaped and often annealed for durability.
What is the difference between drawn and annealed copper?
Copper in this state is known as hard drawn copper. Hard drawn copper has significantly higher tensile strength than soft annealed copper and is used as overhead wire whereas the soft annealed copper is flexible and has somewhat improved conductivity over hard drawn copper conductor.
What are medium hard and hard drawn copper conductors often used for?
Bare Copper conductors are primarily used for grounding purposes as specified in the National Electrical Code. Hard-drawn conductors for overhead transmission and distribution lines, as grounding connections in circuits, and grounding for machinery or equipment.