M.E.T
Member
- Location
- Ferndale, WA USA
Where does the K: 12.9 for copper come from in the calculation (2 x K x I x D) /Cmils
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Sent from my iPhone using Tapatalk
Voltage drop
- Thread starter M.E.T
- Start date
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gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
170601-0742 EDT
M.E.T:
From various people running experiments on conductivity on various materials starting with Mr. Ohm almost 200 years ago. In addition to this has been the evolution of the definition of volt and ampere.
.
M.E.T:
From various people running experiments on conductivity on various materials starting with Mr. Ohm almost 200 years ago. In addition to this has been the evolution of the definition of volt and ampere.
.
RichB
Senior Member
- Location
- Tacoma, Wa
- Occupation
- Electrician/Electrical Inspector
“K” represents the dc resistance for a 1K Cmil conductor that is 1K feet long @ a 75 degree operating temp..
12.9 for CU and 21.2 for AL
12.9 for CU and 21.2 for AL
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