I am new "Electrican". I did follow the instruction to out 1 set of 4 wires together in 1 INTERMATIC T101 40AMP 2 HP 120V timer, but the timer does not work. While all 4 swtiches for 4 set of lighting work fine. So single pole Times only can handles 1 wire of lighting, or whatever you can put together?
Thanks in advance,
Jawin

Confirm that you have 120 volts feeding the timer motor, usually terminals #1 & #2. #2 is usually the neutral, while #1 is the hot that feeds the line side of the timer switch with a built in jumper.