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New Electrical Work
Electrical work ranges from the installation of new electrical components to the maintenance and repair of existing electrical infrastructure. It may also include wiring airplanes, ships and other mobile platforms.
4,938 Questions
How to hook up light with Only two wires available and no ground?
Any house built before 1950 probably only has 2 wires. Black and white. You do not need a ground, that is only to ground the fixture. Hook black to black and white to white and don't worry about it.
Wire nuts disable electrical connection?
Wire nuts don't disable an electrical connection you have to kill the power for that. What they do is isolate the wires so that the positive and negative wires don't touch and protect you from a bear electrical connection.
The way to work a stop watch is by pushing the red button to start and then pushing it again to stop and that is how you work a stop watch and also the way to test someone on how fast they do something.
Can you replace a short length of 14-2 wire with a 14-3 wire and just not use the red conductor?
Yes, you can replace a short length of 14-2 wire with 14-3 wire and not use the red conductor. Just cap off the red wire with a wire nut at both ends to ensure it is not accidentally connected to anything. Keep in mind that the unused red wire must still be properly terminated in electrical junction boxes.
How do you replace male connections on extension cords?
As funny as it sounds there is a right and wrong end of a cord to put the male end on. When you look at a receptical in the wall you will see a longer slot on the left side as compared to the right side, this is the neutral connection. Looking at a plug with the blades facing you the neutral side will be on the right. Now look at the end of the extension cord and you should see the wire colours, black left, white right, green below, this is the correct end for the male end. If when looking at the cord end and the colours are white left, black right, green below, this is the wrong end to put the male end. The white should go to the silver colour screw, black to the brass colour screw and green to the green coloured screw. By doing it this way the polarity will stay true along the cord to the device that gets plugged into it.
How do you remove a crown moulding light cover from a fluorescent ceiling light fixture?
To remove a crown moulding light cover from a fluorescent ceiling light fixture, follow these steps:
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Locate the clips or latches that hold the cover in place. These are usually located on the back or sides of the cover, and may be hidden by the crown moulding.
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Gently press the clips or latches to release them from the ceiling light fixture. Be careful not to break or damage the clips or latches.
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Carefully lift the cover away from the ceiling light fixture, being careful not to damage the cover or the light fixture.
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If the cover is difficult to remove or if it seems like it is stuck, try gently wiggling it back and forth or using a flat tool to gently pry it loose.
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Once the cover is removed, you should be able to access the light bulbs and other components of the light fixture.
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To replace the cover, simply reverse the steps, making sure that the clips or latches are securely fastened before turning the light back on.
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How do you test for current in household wiring using a voltmeter?
your meter must be capable of reading ac current. set it to ac(there will be more than one scale and house current is 115 volt so choose one that is sure to handle that. If you are checking an outlet, insert one probe in each slotted receptacle and read how many volts you have--if any Answer #2 Voltage and current are two different things. You can't check current with a volt meter unless it has a setting to measure current. Even then, you have to have the meter in series with the device being checked. This can be dangerous if you don't know what you are doing. Another safer option is to get a clamp meter which will measure current draw when clamped around ONE wire leading to the device in question.
At what height is non-metallic sheathed cable considered protected from physical damage in USA?
When run exposed on walls in unfinished basements the 2005 NEC clarifies that the entire length of NM cable run exposed below the "framing members" above that wall, must be protected from physical damage. Also, the end of the protecting sleeve must have a non-metalic bushing. The NEC does not specify a measurement, but it refers to "in exposed work". Everything below the beam is "exposed". The workbook also shows sample sketches that show the protecting sleeve going all the way up to the ceiling beam. If running the cables on the underside of the framing members (beams) physical protection is not required. But smaller size cables require a running board between the cable and the beams. reference 2005 NEC 334.15C
Why is electricity called the juice?
The early theories of electricity relied on modelling as a fluid. One the earliest ways found to generate an electric charge is to rub amber with silk. and amber has a fatty "juice" In it, which may have influenced terminology. As well, many if not most storage cells (batteries, especially the first ones made) are based on dissimilar metal plates/rods immersed in a fluid solution, or "juice."
It's still common to hear someone say that electricity "flows" from one place to another.
Connect the black wire to the single switch hole, the brown wire to one of the holes on the double switch, and the gray wire to the other hole on the double switch. The earth wire should be connected to the grounding point on the light switch. Make sure to follow proper safety procedures and consult a professional if you are unsure.
A wedge is used to take advantage of the fact that work done = force x distance.
Simply put if you need to force two points apart a wedge allows you to use less force by moving a greater distance.
If you knock a wedge into a piece of material by 10cms in order to widen the gap by 2cms it will take one fifth of the force to achieve this.
If you think of a screw as being a nail with a very long wedge wrapped around it, you can force this into a solid piece of wood with one hand simply by taking advantage of the mechanical advantage that this wedge provides.
A 220 oulet line carries two 110 vold lines and a ground wire. The outlet is shaped differently than the standard household (110) outlet, usually
having at least one (plug-in) prong 90 deg to the other, sometines two of the prongs. This type is usually found in a utility room for dryers, most of which use 220 power.
Yes, using an incompatible bulb in a lamp can cause the breaker to trip. Different bulbs have different power requirements, and an incompatible bulb could draw too much power, causing the breaker to kick in order to prevent overheating or fire hazard. It's recommended to always use the proper type and wattage of bulb recommended by the manufacturer.
What is the International colour code of AC wiring?
Sorry, don't know if there is any "international code" but there are separate European and US wiring standards which are known as "codes" or "regulations". Many countries around the world use wiring regulations similar to the European system.
Most of the others use wiring codes similar, if not identical, to the US system.
Europe
Live: Brown
Neutral: Blue
Earth: Green/Yellow
USA
Live: Black for 1st "Hot" leg, Red for 2nd "Hot" leg
Neutral: White
Earth: Green or Bare Wire
NEC 2005 Article 90.4 - "This code is intended to be suitable for mandatory application by governmental bodies that exercise legal jurisdicition over electrical installations, including signaling and communications systems, and for use by insurance inspectors. The authority having jurisdiction for enforcement of the code has the responsibility for making interpretations of the rules, for deciding on the approval of equipment and materials, and for granting the special permission contemplated in a number of the rules."
100 amp breaker on outside pole what causes power to shut off or lights flickering?
Well the most probable answer is that you are exceeding your electrical load limits. This means that all the circuits on that 100amp breaker, i.e. ligts, outlets,etc are drawing more than the 100 amps you have available. You can most likely fix this by installing a higher amp main breaker, however if you do that you also need to check and possible install larger circuit breakers. Also you might want to check all your grounding and make sure you actually have all your outlets and lighting going to "earth ground", and if you have any GFCI circuits which would be in the bathroom or the kitchen and they are tripping due to excess amp draw or a short, this also could be a possiblilty.
Which side of a 20amp 240v outlet for a window ac does the black wire go?
I'd suggest checking into the electrical codes for your location because often it's not legal for people to do their own electrical work without at least an inspection by an electrician BEFORE power is applied. Having said that, the black wire normally indicates "hot". I'd recommend that you try to look at a similar outlet to see how it is wired, or check Wikipedia for electrical wiring. House wiring is of course extremely dangerous. Make sure that you understand the safety rules before working on anything electrical.
What is the normal voltage of house electricity in the US?
The voltage in North America can be as low as 110 and as high as 125 volts. The average is about 115 to 117 volts.
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House voltage in the US is generally 120v line to neutral and 240v line to line. It is referred to as a "120/240v single phase service." Actual voltage can be as low as 110/220 or as high as 125/250.
It sounds like your fan also has a light with it. If your wall switch is a two gang box with two switches in it most likely one switch is for the light on only and the other switch is for the fan on only. This can be checked out by installing the fan and making the connection green to green, white to white, black to black. Turn on one of the switches and see if the fan operates. Disconnect this connection and then connect the red wire to the black fan wire. Turn the other switch on. If the fan turns on again, then the two switches were installed to operate the fan and light separately. If this is the case disconnect the red and fan black wires and reconnect the black to black. This is the fan connection. Connect the red to blue fan wire and this is the light on the fan connection.
What is involved in installing a double pole breaker for a 2 prong plug?
This type of question usually means you aren't ready to do this yourself. Study some electrical material and the National Electrical Code and work this answer out for yourself, or call a professional electrician. If I were to give you an answer, you might attempt to do something you shouldn't be doing, and that may cost someone a shock, a home fire, or their life.
How do you add lighting to an unfinished basement?
=== === By asking this question you are probably not quite ready to take on this particular task. The correct answer to your question will depend on the distance from the breaker panel and exact locations of the lighting units, their voltage and power rating. <><><> Additional lighting and wiring for it can be pulled off an existing lighting circuit as long as the circuit breaker for the circuit still has unused current capacity available AND the existing wiring is capable of carrying the extra current load without overheating or catching fire. <><><>
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 THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
How to wire incandescent light fixture with black and white wiring is it wired to ground?
== == === === By asking this question you are probably not quite ready to take on this particular task.
The correct answer to your question will depend on the exact location of the light fixture, its voltage and its power rating. <><><> Whatever is going on, your present wiring situation is not just confusing, it is dangerous. The bare wires are not meant to carry current. They are not coated, and thus have no insulation to protect surrounding material from the heat created by electrical current passing through the wire. You need to cut the whole circuit off at the breaker box until you can get the situation sorted out. Otherwise, you could have an electrical fire. This is what is wrong. At some point in your circuit, some numbskull (probably not a professional electrician) connected something wrong. The thing about electrical circuits is, the current doesn't know what color wire it is travelling through. It travels just as easily across black, white, red, and bare wires. In fact, there is no real difference between any of the wires, except that the "ground" wire has no coating. Electricians use the coating colors so they can keep track of which is which. So it's really more appropriate to talk about hot, neutral, and ground wires than black, white, and bare wires. All the wires could have the same color coating, and the circuit would still work fine. The problem is, if you were trying to hook something up, you wouldn't know which wire was hot. So someone got smart and color coded the wires. By standard, electricians use the black wires for hot and the white wires for neutral, but only because they assume that everyone else does. If the previous "electrician" didn't, it screws everything up. And that's what happened here. Someone did something that was not according to standards. I would start with the switch box that controls this light fixture. There should be two bundles of wires coming into this box. Each bundle will have a black wire, a white wire, and a bare wire. The two white wires should be connected to each other, but not to the switch itself. The two black wires should be connected to the switch. The switch will have two brass screws on one side. The black wires should be bent into a hook and hooked around those two screws and the two screws tightened. It doesn't matter which is on top and which is on bottom. The two bare wires should be connected to each other, and IF the switch has a green screw at the very bottom, the two connected bare wires should be connected to that green screw. That's how everything SHOULD look. But, it may not be that way, which would explain why your light doesn't hook up correctly. You may have a black wire and white wired connected to the two brass screws, instead of two black wires. You may have a bare wire connected to one of the brass screws. You may have a white wire and a bare wire connected to each other. All of these are no-nos. Anything other than what I described above is unacceptable. Hot and Neutral are reversed. You should not be getting any voltage through the ground wire ... EVER !!
On many light fixtures the black and white colors do not matter, except as a safety standard; it should work either way. Typically, however, the black goes to the tip of the bulb and white (neutral) to the shell, for safety when the bulb is being replaced and the current may be on. If the light fixture has a switch, it should always switch the black (hot) connection.
In your case, the white to ground means that the "neutral" may have been accidentally reversed somewhere with the black (which should never happen), leaving the safety grounding wire as the only connection that will "work." It also could mean that the voltage is still "on" when the switch is off, and a person could be electrocuted by "completing" the circuit even with the switch "off". <><><>
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 THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
You have a potentially deadly wiring problem in which the open neutral could mean someone accidentally switched off the white wire instead of the black wire, or some other horrible mistake. Please call a qualified electrician to diagnose this problem immediately.
What colours are used when splitting a cat5e cable so it can run two outlets?
The colors only matter if you are trying to pair up to an already headed end. Whats more important is the pins you use. For cat5e and normal 10/100 ethernet you only use pins 1,2,3,and 6. Cat5e has 4 paired wires (orange-white / orange/ blue-white / blue / green-white / green / brown-white / brown) A typical standard head is colored this way, starting from pin 1-8: 1) orange-white 2) orange 3) green-white 4) blue 5) blue-white 6) green 7) brown-white 8) brown So, its possible to use the orange pair, and green pair for one outlet, then re-wire the blue pair and brown pair to the second outlet as long as its headed to use pins 1,2,3,6 on both ends.
How do you install a 240 volt light switch?
I'm guessing you want to know what a 240v switch is? If you look at a 120v single pole switch, you will see two brass screws on one side. This type of switch is designed to interrupt current flow in one conductor. A 240v switch is really a double pole switch. It has 4 screws and is capable (and required) of interrupting current flow in two conductors simultaneously. This is an NEC requirement. It allows a local means of disconnect instead of having to go back to the breaker, and a multiwire disconnect is required to disconnect all ungrounded (hot) conductors at the same time. That way one 120v leg cannot be shut off while the other is on. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS. If you do this work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicator
to insure the circuit is, in fact, de-energized.
