Re: Power distribution, was: 2-wire, unpolarized outlet ?
¿ªÔÆÌåÓýJim you forgot about Romagnosi [Gian Domenico Romagnosi] In 1802? was fooling with volta¡¯s pile, and made a needle move? [lots of debate] later . 1820 Orstead gets all the credit. Then what about early telegraph grounding? before they figured out that often earth conducts¡ ohh way OT again From: [email protected] [mailto:[email protected]] On Behalf Of Jim Whartenby via groups.io
Sent: Monday, January 13, 2025 4:28 PM To: [email protected] Subject: Re: [HallicraftersRadios] Power distribution, was: 2-wire, unpolarized outlet ? ? Don According to Mr. A.I. Google, the grounding of the neutral line became mandatory with the 1913 update to the NEC.? Grounding of the building service was not explicitly required until 1918.? It seems that the NEC has always been a work in progress.??My search terms were: "when did the NEC require that the neutral line be grounded" and "when did NEC require grounded outlets". ? Tesla, Sarnoff, Armstrong, de Forest, Shockley, Collins, among many others, are all demigods, some with a vocal cult following, others with vocal detractors.? For me it would be Oliver Heaviside and John Costas to name two relatively unknows but both have made great contributions in the field of electrical engineering. Jim ? -- don??? va3drl |
don Root