Sure; the fan has 3 wires so you can wire the light and fan separately, but if you don't have that option, you don't NEED to put the fan and the light on separate switches.
You can always turn the light or fan on/off using the pull strings.
In residential wiring applications the most used is 14 gauge wire for light switches as long as the circuit breaker or the fuse is 15A. If your lighting circuit is on a 20A fuse/circuit breaker then you need to use 12 gauge wire
The one wire carries the electricity or voltage. The lamp is grounded completing the circuit. You don't. The light switch is only half the circuit, a lamp has nothing to ground to so it can not work. If the wire to the switch is 3 wire, the bare wire would complete the circuit and power the plug, but it would not be up to code and could present a fire hazzard.
One 1,000 watt light will push a typical circuit breaker close to its limit. Six such lights will require wiring and circuit breakers to handle the load. Figure one circuit breaker per light. That means not only six switches but six switches, each on a different circuit breaker. Don't overload the wiring or it could cause a fire.
what is the purpose of a heated wire circuit
It could mean two things. The first thing would be that the tester is not working. Test on a circuit that you know to be energized. The second thing causing a tester not to light is that the circuit under test is de energized. When using these types of testers always test the black to white wire and then black to ground wire. If the tester indicates there is a voltage to ground and not the white then the neutral white wire is open somewhere in the circuit.
A circuit breaker does not have a wire fuse in it.
A ground (earth) wire is needed in not just a light circuit but in all circuits that are now installed.
When one wire or terminal is not connected to a light bulb, it is not possible for electricity to complete the circuit. When a circuit is not completed, the bulb will not light. An off switch, for example, breaks the circuit.
A ground wire is normal.
Switch Light Wire battery
If you are talking about the light circuit then : The Battery, The bulb and the wire.
battery, wire, and light bulb
In residential wiring applications the most used is 14 gauge wire for light switches as long as the circuit breaker or the fuse is 15A. If your lighting circuit is on a 20A fuse/circuit breaker then you need to use 12 gauge wire
yes
The one wire carries the electricity or voltage. The lamp is grounded completing the circuit. You don't. The light switch is only half the circuit, a lamp has nothing to ground to so it can not work. If the wire to the switch is 3 wire, the bare wire would complete the circuit and power the plug, but it would not be up to code and could present a fire hazzard.
batteries, wire, connectors, and light bulbs
Check for loose wiring at the light itself and also at the light switch. There can also be a loose wire anywhere in the circuit supplying power to that light switch. Start at the light itself and work backwards in the circuit until you find the loose wire.