2003年5月7日 · Re: What is Hard Drawn Copper? Tom, hard drawn copper wire is wire that is not annealed after the drawing process. Annealing makes the copper more flexible. Hard drawn has at least 150% more tensile strength than annealed. I don't know if a regular electrical supply would stock it or if you would need to special order it.

2005年3月6日 · Re: Hard , Medium, Soft drawn copper? The power company around the inner City of Minneapolis / St. Paul has a bazillion miles of hard drawn running pole to pole. The #4 solid that I occasionally run exposed is soft drawn (as is the #6 & #8) that I use for hooking up parts of a dwelling grounding electrode system.

2012年6月26日 · ALL copper bussing used in North America for equipment built to UL / NEMA specifications will be "Hard-drawn copper, 98 percent conductivity". Generally what this is put into specifications for is to avoid having someone fabricate their own bus system from off-the-shelf soft copper that you would use for making something like jewelry, art ...

2021年8月29日 · The exchange is that annealed copper wire has 97% of the conductivity of hard drawn copper, but almost half the tensile strength, which relates to its ability to flex and bend. People that make copper wire sculptures use hard drawn copper (when they can get it) because it’s less susceptible to the form getting altered by something bumping ...

2021年8月29日 · Hard drawn copper - 500-700 ksi. Conductivity 97 % IACS . G. gar Senior Member. Location Ann Arbor, Michigan

2007年9月28日 · What is typically acceptable for use as an underground ground ring for bare, tinned copper conductor, hard or soft drawn? Thanks. Carl

2011年5月26日 · For #12 copper annealed the area is 0.005129 sq-in. Thus, elastic limit is 51.29 #, and tensile strength is 179.5 #. Normally the wire you work with is cold drawn and therefore work hardened.

2013年10月1日 · copper-clad aluminum. 230.23 Size and Rating. (A) General. Conductors shall have sufficient ampacity to carry the current for the load as calculated in accordance with Article 220 and shall have adequate mechanical strength. (B) Minimum Size. The conductors shall not be smaller than 8 AWG copper or 6 AWG aluminum or copper-clad aluminum.

2022年10月28日 · Life would be hard on sparkies if building wire used hard-drawn copper or copper-clad steel. don_resqcapt19 said: This system is covered by Article 810 and nothing in the rest of the code applies , even things in other Articles of Chapter 8, unless the language in 810 says the other rules apply.

2009年4月7日 · Good morning All, I have a situation where field doesn't like to work with 600V 4/0, 19 strand XLPE since it's pretty stiff and terminating it in an AC panel is quite a hassel. The purpose of this cable is to provide 200A 120/240 single phase service. The AC panel is located about 200 ft from...