[D8935AAP], Letter from William J Jenks to Arthur Edwin Kennelly, April 2nd, 1889


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[D8935AAP], Letter from William J Jenks to Arthur Edwin Kennelly, April 2nd, 1889

Editor's Notes

Edison Electric Light Co####Mr. A.E. Kennelly, Edison's Laboratory, Orange, N.J, Dear Sir:--####The fact has been brought to my notice that the table showing sizes and conductivity of wire of the Edison Standard Guage is based upon chemically pure copper, and that something predicated upon a commercial standard would undoubtedly be more serviceable and less likely to mislead onstructors. Also that the curve showing the carrying capacity might well be reviewed and possibly corrected. I have asked Mr. Vail what his judgment is as to the percentage of the conductivity of pure copper which he thinks we can hope to secure as a matter of actual practice. His reply is "96 to 97%."####I think, therefore, if a table could be formulated on the basis of 97% purity it would be an important addition to our information and literature in this respect.####It seems also that some definite arrangement should be made by which tests of the copper provided by the manufacturers should be frequently carried on that there may be no question as to the absolute carrying ccapacity of conductors installed in all branches of our business.####The Bureau would be glad to receive your advice on these points, and, (if not asking too much) such assistance in practical way as you may be able to give consistent with your many duties.####Yours truly, W.J Jenks, Director.####[name mentions: W.J Jenks, A.E Kennelly, John Vail, West Orange Laboratory, Edison Electric Light, Edison Standard Gauge]





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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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