CHAPTER IX TWO-WAY AND INTERMEDIATE SWITCHING Two-way Control. a Although the control of lights in the majority of cases is from one point only, it would be of great advantage in very many cases if the lights could be operated fromanbsp;...
|Title||:||Electric Wiring Diagrams for Students and Those Concerned with the Installation, Testing Or Use of Electrical Lighting and Service Equipment in Buildings|
|Author||:||G. E. Stubbs|