The main report listed 8 points to consider in deciding the design of the new standard. Sometimes, cardboard inserts are present to hold and protect the tiny light bulbs. Feb 10, 9: The coexistence of parallel and tandem blade plugs necessitated the construction of wall sockets that could accept both types. Manufacturer of the shown plug is not indicated; it could have been made in Australia, since the type has been used also in Australia and New-Zealand in the s - s. Namespaces Article Talk.
Separable plugs had been available for more than a decade prior to Hubbell's design.
Dating Old Electrics
In this application the "dedicated" socket refers to one that is not connected to a residual current circuit breakerwhich is otherwise mandated for all normal power sockets. Karen Thanks, Karen. It can accept Europlugs, and also but with no earth connection possible French and German types. Hubbell's first plug design had two round pins which differed from those already in use in Europe in that the tips of the pins had annular detents similar to those of present-day jack plugs to positively retain a plug in its socket. Non-NEMA duplex socket with angled slots for line hot and neutral w.