yes, all conductors shall be insulated to the highest voltage utilised
The light is wired the same as any voltage fixture. Bring the source voltage to the fixture and connect it to the two fixture wires. If you want to control the off-on of the fixture take the source voltage to a switch first and then out of the switch to the light fixture.
The same procedure is used to wire a mercury vapour fixture as it is a normal home fixture. First the voltage source is needed and has to match the voltage that is on the nameplate of the mercury vapour fixture. The amperage of the fixture has to be taken into consideration, also taken from the fixtures nameplate. Once the amperage is known then the decision is whether one or more fixtures will be placed on the same circuit. When the total amperage is decided on, it will be that amperage that decides what size conductors will be used and what size breaker will be used to protect the circuit. Next decision is how you want to control the fixture. There are two methods depending on where the fixture will be placed. If it is outside then a photo cell with a bypass switch ahead of the cell is the most common configuration. If the fixture is an indoor type then just a wall switch will be used to control the fixture.
In low voltage wires, the insulation factor of the coating determines the wire's voltage rating. A wire coating of cross linked poly vinyl is used as an insulation. High voltage transmission wires uses no coating on the wire
To properly wire a light fixture in a room, first turn off the power to the circuit. Then, connect the black wire from the fixture to the black wire in the electrical box, and the white wire from the fixture to the white wire in the box. Finally, connect the ground wire from the fixture to the ground wire in the box. Secure the connections with wire nuts, and then mount the fixture according to the manufacturer's instructions.
For a pendant light installation, it is recommended to use a flexible and insulated wire, such as a stranded wire, that is rated for the appropriate voltage and current of the light fixture. This will ensure safety and proper functioning of the pendant light.
First and foremost make sure the light bulb is a good one. Try it in another fixture to make sure, even if it just came out of the box it was packed in. If you have checked the switch for power then you must have a tester. The power coming to the switch will most likely be on the top screw. Turn the switch on and see if you have voltage on the bottom screw. Check this voltage from the screws to the ground wire as the neutral will not be accessible in the back of the switch box. If there is voltage to the bottom screw then move on to the light fixture. Remove the outside light fixture and see if you get a voltage reading on the incoming hot (black ) wire. If there is voltage there then you have to see if the lamp holder is making continuity. If you have an ohm meter or a continuity meter remove the lamp fixture from the "hot" wire and the neutral connection and see if you get a reading across the fixtures black and white wire. This has to be tested with the bulb in the fixture. No continuity reading then there is trouble with the socket. Might be time to think about a new fixture.
A three wire fixture most likely is one that has two separate loads within it. An example is a ceiling fan with a light fixture. If the three wire is used to separately switch the two loads you have to make a decision as to which load you want to work with the two wire fixture. Once that decision has been made connect the two wire fixture in parallel with the your selected load on the three wire fixture. On these types of installations the three wire fixture is usually controlled by two separate switches in a two gang box. The red and black wires of the three wire terminates on the bottom of either switch. The white wire is connected to the incoming neutral. The top of the switches are paralleled together with the "hot" feeder from the distribution source.
If they are grounded they get an electric shock or electrocuted. If they are not grounded or in simultaneous contact with the neutral wire, nothing. That's why birds can sit on a high voltage wire and survive; they are not grounded.
Answer for USA, Canada and countries running a 60 Hz supply service.If this is a regular incandescent fixture, the manufacturer probably just used white wire for cost reasons.Before you connect the fixture's wires you should take a close look at the fixture and make sure that the wire that goes to the shell of the bulb socket is connected to neutral wire (usually the white wire in the ceiling box) and the wire that is connected to the center of the socket goes to hot (usually the black wire in the ceiling box).If this is a fluorescent or hid (metal halide or sodium vapor) lamp fixture, please consult the directions or contact the manufacturer for installation instructions.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THISWORK SAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
To properly install a 3-wire light fixture in your home, follow these steps: Turn off the power to the circuit at the breaker box. Remove the old light fixture and disconnect the wires. Connect the black wire from the fixture to the black (hot) wire in the ceiling box. Connect the white wire from the fixture to the white (neutral) wire in the ceiling box. Connect the green or bare copper wire from the fixture to the ground wire in the ceiling box. Secure the wires with wire nuts and mount the fixture to the ceiling. Turn the power back on and test the light to ensure it is working properly.
Need more information. Wattage of bulb, voltage of bulb, voltage of battery and wire size of the circuit.
10-2 wire can be used to provide power to low-voltage lignts.