If you are no longer using the dryer and there are 4-wires, and the dryer was 220 to 240 volts, it can be split into two 110 to 120 Volt circuits.
The fan is probably a 115 VAC single phase fan and the outlet is probably a 230 VAC "two phase" outlet. The fan would then have the following wires: hot (black), neutral (white), and ground (green). The outlet would then have the following wires: hot #1 (black), hot #2 (red), neutral (white), and ground (green). Pick either of the two hot wires on the outlet and connect the hot wire of the fan to that (ignore the other hot wire on the outlet) and connect the neutral to neutral and ground to ground. If the wire colors are not as I described above you may have something else (e.g. 3-phase) and that would be wired differently, but those systems are usually used only in industrial settings not the home.
You don't, you need a three wire to correctly make the connection.
it is Outlet that will work with 2 hot wire one black and white.
3 prong the 2 black wires are your hot and the braided is your neutral.
A 220 vac circuit has 2 hot wires and a neutral. The neutral stays at 0 volts and the hot wires vary between positive and negative. When one is positive, the other is negative.
Hot and neutral, or hot and hot, plus ground. (2 + 1) 2 hots a neutral and a ground 3+1
If you are no longer using the dryer and there are 4-wires, and the dryer was 220 to 240 volts, it can be split into two 110 to 120 Volt circuits.
The fan is probably a 115 VAC single phase fan and the outlet is probably a 230 VAC "two phase" outlet. The fan would then have the following wires: hot (black), neutral (white), and ground (green). The outlet would then have the following wires: hot #1 (black), hot #2 (red), neutral (white), and ground (green). Pick either of the two hot wires on the outlet and connect the hot wire of the fan to that (ignore the other hot wire on the outlet) and connect the neutral to neutral and ground to ground. If the wire colors are not as I described above you may have something else (e.g. 3-phase) and that would be wired differently, but those systems are usually used only in industrial settings not the home.
Just use 2 of the wires instead of 3.
Answer for USA, Canada and countries running a 60 Hertz supply service.In America, a 30A and 50A receptacle is now required to have three wires in addition to the ground. Two of the wires are hot wires and the third will be a ground. These are not used anymore in new work but are common in old work. I suggest for safety sake rewiring and using a 4 wire outlet. The problem with a three wire outlet is that you do not have a neutral to carry any unbalanced part of the load back to the source safely therefore creating a potential for electrocution!!
You don't, you need a three wire to correctly make the connection.
A timer is a type of contactor. My answer assumes you do not need an additional contactor besides the timers and the timers are operated by the same circuit as the outlet. Each timer and the outlet need connections to the neutral and grounding conductors of the circuit. For the hot wires, you have to run your hot feed to each of the timers on the "line" side of the contacts. If the timer and the "line" side of the contacts are different connections you will have 2 connections in each timer. Then from the "load" side of the contacts you run wires that connect to the hot side of your outlet. At some point you will splice these together so you have only one hot wire connection to the outlet. Remember that timers, contactors, relays, etc., are simply switches operated by various means. You have the hot feed on one side and the "switch leg" to your load. You also have a control of some kind, and in your case your controls are the timers.
it is Outlet that will work with 2 hot wire one black and white.
3 prong the 2 black wires are your hot and the braided is your neutral.
Sounds like it is a 220-240 Volt hot water heater. The black and red are connected to the 220 volts supply and the white is connected to Neutral. At the breaker panel red and black connect to the 2-pole 220 volt breaker and white goes to the neutral bus bar.
the bare copper is always a ground