Abstract
Bolted bus connections between bare aluminum and copper, with an electrotinned and flowed finish, will provide a low-resistance joint which will be reasonably stable even under extreme conditions of elevated temperature and corrosive attack. While the use of a compound, Penetrox ``A,'' will greatly improve and stabilize the contact conditions, the combination of aluminum and copper (electrotinned and flowed), will form a satisfactory electric connection even when made without the use of any compound.

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