Proper wiring for 220 volts timer - Intermatic T104 24h 208-277v Mechanical Time Switch

You posted under T104 timer.
Open following links for wiring information and diagrams.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html
http://waterheatertimer.org/B220C.html

You say 220Volts and I use 240Volts = same thing
T104 is 240Volt timer with 240V WG1573 clock motor
240Volt cable has two hot wires that arrive from breaker box. These wires connect to terminals 1 and 3.
240Volt cable going to Load has two wires. These wires connect to terminals 2 and 4.
Bare ground wire connects to green screw.

If your timer has terminal A, then terminal A is not used unless you are converting timer for 277Volt operation, or some other specific wiring purpose, or if your 240Volt cable from breaker box also has a Neutral wire, in which case the Neutral connects to terminal A.

If you have different brand timer, or different model number, then add a comment with model number that shows inside timer door, and I will search for wiring diagram.
http://waterheatertimer.org/Boxtype.html

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