Staircase Wiring or Lamp Circuit Controlled By Two Switches

Staircase Wiring or Lamp Circuit Controlled By Two Switches Points : staircase wiring or lamp circuit controlled by two switches For the lamps to be controlled by two switches, it is necessary two use two-way switches. Fig (a) shows that the lamp is dark. The wires used between the switches are called as strap wires.

In Fig. (b) the lamp is switched on with the switch No. 1, while Fig. (c) represents that the lighted lamp is switched off with switch No.2 and in Fig (d) the lamp is again lighted with switch No.1. Thus when the lamp is lighted either of the strap wires carries current.