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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
Ohm's law states: I*E=P in other words: I = amps, P=watts, E=volts If: I or Amps=20 and E or Volts=120 (i am guessing as this one is standard for a residance) Then: 20 * 120 = 2400 or 2400 watts of power are avaliable 2400 watts / 110 watt bulbs = 21.8 bulbs can in theory, be placed on a 20 amp 120 volt circuit. The reality is that you would probably not want to place more than 17 or 18 100w bulbs on a circuit for safety and code required design load calculations. However you can bet that all bulbs in a residance will not be active at one time and therefore seldom will the peak load be at max. None of this takes into account any other loads on the circuit or derating factors such as heat, etc. When in doubt always get a qualified electrician to help or guide you as electrical fires are the cause of much property loss and life safety concern. SAFETY FIRST AND ALWAYS! Hope this helps! Terry
1900mA is equal to 1.9 amps. To convert milliamperes (mA) to amperes (A), you divide the value by 1000.
What wires do you hook up to the fuse box when wiring a hot water heater?
When wiring a hot water heater to the fuse box, you typically connect the hot and neutral wires from the water heater to the corresponding terminals in the fuse box. It's important to follow the manufacturer's instructions and local electrical codes to ensure safe installation. If you're not comfortable working with electrical wiring, it's best to hire a licensed electrician for the job.
Can you have a 120v circuit on a 30 amp breaker?
No, electrical code typically requires that circuits be protected by a breaker that matches the wire size. A 30 amp breaker is typically used for circuits with larger wire sizes. For a 120V circuit, a 20 amp breaker is more suitable with appropriate wire size.
No, NMD 90 14-2 wire is not suitable for a 2 hp 230 volt dust collector. You would need to use a wire with a higher ampacity such as NMD 90 10-3 wire to handle the current required for a 2 hp motor. Ensure to consult with a qualified electrician for proper wire sizing and installation.
200 amp electric service Do you ground the meter pan and the circuit panel?
Yes, the meter pan is typically grounded to the earth and the circuit panel is also grounded to ensure safety and proper functioning of the electrical system. Proper grounding helps to prevent electrical hazards such as shocks and fire.
Can you use a power strip that is plugged into a extension cord and not directly into the wall?
Not advisable. With any long run of electrical cord, you are reducing its current (amps) capability and there will be a voltage drop. Power strips need to be plugged into a wall outlet only. If not, the electrical cords could get hot and start a fire. Yes just make sure that the rating of the extension cord is at least 3 conductor # 14 wire and it has a U ground pin on the plug that goes into the wall.
What saves you money on your electric bill 100 amp entrance or 200 amp entrance?
Neither will save you money versus the other. It's like asking you if a pipe 2 inches in diameter, bringing fresh water to your home, will save you money on your bill versus a pipe that is 1 inch in diameter. It all depends on your usage, which is what you pay for. The larger pipe will allow you to get MORE water into your home, just like the larger 200 Amp entrance will let you use MORE power. To make this decision you need to consider what electrical loads your home has, and check local building codes. A home with all electric heat will need a larger electric service than one that has propane, natural gas, or other heat.
An amp is a mesurement of electrical CURRENT. There are milliamps,microamps,etc. Actually amp is short for ampere. An amp amp may be referring to the current draw of an amplifier also called an amp. A electronics dictionary does not have the term amp amp. It may be an invented term simply made up to impress the consumer or reader.
Generally no. The purpose of an arc fault breaker is to kill a circuit if water or any other type of element were to intrude the branch to prevent an arc fault blast. They can go bad over wear and tear over time and if not used properly or if the neutral becomes to short to reach the neutral bar or if an arc fault blast occurs the breaker will go bad ofcourse.
How do I connect 6-3 wire to the breaker?
To connect 6-3 wire to a breaker, remove the panel cover, insert the wire into the breaker terminal, and tighten it securely with a screwdriver. Make sure to follow the manufacturer's instructions and local electrical codes to ensure proper installation. It's recommended to have a licensed electrician perform this task for safety and compliance reasons.
Which uses more watts a 100Watt light bulb or a toaster?
That depends entirely on the toaster, but in general, most toasters use over 1,000 watts.
How do you test fluorescent lighting circuit?
Continuity of electrical cables must, because it is the process of inspection to found any discontinuity in the cable
An emergency ballast is a lighting ballast that has an internal battery. This battery will store enough energy to power the light for a short amount of time. Typically this battery is not designed to last through long power outages. Rather, it is normally used in conjunction with a backup generator. In the event of a power loss, the ballast immediately carries the load of the light, until the generator comes online. Some manufacturer's do not combine the ballast and the battery in the same metal can; they use 2 separate cans. The battery part in many instances does not light all the lamps of the fixture and it may only light the lamps about half brightness. The purpose is only to assist in evacuating the building
0.5 footcandle is a unit of measurement used to quantify the amount of light falling on a surface. It is equivalent to the illuminance produced by a candle from a distance of one foot.
What are the three effects of electric current?
Death, injury, and electricution
If we ignore the above, humourous(!), attempt at an answer, then the three effects of an electric current are (1) heating effect, (2) chemical effect, and (3) magnetic effect.
Examples of the heating effect include electric heaters, kettles, stoves, etc. An examples of the chemical effect is electroplating. Examples of the magnetic effect includes relays, motors, etc.
The SI unit of current, the ampere, is defined in terms of the force between two parallel conductors due to their magnetic fields (i.e. the magnetic effect).
How do you replace a basic light switch that is mounted on the wall?
FIRST OF ALL YOU HAVE TO FIND OUT WHICH WIRE IS YOUR INCOMING POWER AND WHICH ONE GOES TO DEVICE. MOST ANYKIND OF ELECTRICAL VOLTAGE TESTER WILL WORK THAT GOES UP AND ABOVE WHAT YOU ARE TRYING TO TEST. GENERALLY SPEAKING THERE WILL BE A BLACK AND WHITE AND POSSIBLY A GROUND IN ANY OF THE CABLES COMING IN AS LONG AS ITS NOT A FOUR WAY OR THREE WAY.THE BLACK WIRE IS SUPPOSED TO BE THE HOT WIRE COMING IN AND YOUR WHITE IS THE NEUTRAL. THE BLACK WIRES ARE THE ONES THAT ARE SWITCHED AND ARE ATTACHED TO SWITCH ON THE SIDE . ON A SINGLE POLE IT DOESNT MATTER WHICH ONE GOES ON THE BOTTOM OT THE TOP THE SWITCH ,IT WILL STILL BREAK THE FLOW OF ELECTRICITY . THE WHITE WIRES ARE TIED TOGETHER AND PLACED AS FAR FROM ANY OF THE HOT FEEDS AS POSSIBLE FROM THE BLACK SWITCH LEGS. IF YOU HAVE THE GROUND WIRES , TWIST TIGHT TOGETHER LEAVE ONE OF THE WIRES LONGER AFTER TWISTING TO ATTACH TO THE GREEN SCREW ON OUTLET FOR GROUNDING IF NEW WIRE. OLDER HOUSES ( 50 YEARS OR SO DIDNT HAVE GROUND WIRES . ATTACH TO BOX AND MAKE SURE YOU HAVE VOLTAGE TO THE SWITCH BEFORE ATTACHING THE COVER.
How do you calculate electricity usage from your meter reading?
There should be a label on the appliance that gives the amount of energy/wattage it uses. it could be on the bottom, side, inside, etc. If the only thing listed is "amps" you can multiply the number of amps x 120 to find out the wattage. The wattage number listed is the maximum amount the appliance uses, a refrigerator listing 500 indicates that is the amount expended when the compressor is operating.
What is the furthest distance from a 200 amp panel and the meter?
there is no right or wrong answer to your question. If it is a long run that you have to do you just upsize to the proper wire to account for the voltage drop with the longer distance. If you need a definite answer you can go to your nearest home depot and buy an "ugly's" pocket manual that will answer a lot of your questions.
What is the cheapest type of electric heater?
All electrical heating is 100% efficient. Every nickel you spend is converted into usable heat unlike other sources, they just go up the chimmney. The type you choose depends on you and where you are. You can go baseboard, there is a calculation a qualified electrician will make for you so you get the right wattage per room. This relies on the convection current principle to circulate the warm air. You can get an electric arc furnace which uses forced air like the oil and gas one. They are very quiet, of course efficient and have the "feeling" of warmth because of the felt air. This of course is your option if you need central a/c as well. You can go with radiant heat panels in your ceiling that fit between the strapping on your rafters. So you have a clean sheet rock ceiling. Radiant panels don't heat the air, they heat objects in that room. You can also go with radiant heat inlaid in your flooring or subflooring heating the concrete, tiles, hardwood or whatever.
So depending on where you live, you have to pick what's right for your locale. It's clean, it's cheaper than fuels, require zero maintenance, and you don't waste any of your money. Gotta like that.
Andy
AnswerI think Andy must work for the power company. Electricity is most definitely not cheaper than gas, although with the way gas prices have been going, it might become that way.Electric resistance heat does indeed convert 100% of the incoming energy to heat. But per amount of incoming energy, you pay a lot more for electricity than you do for gas. You can get new gas furnaces that are 96% efficient. One can argue that 4% inneficiency is infinitely greater than 0% inneficiency, but unless the energy prices go totally topsy turvy, it still remains cheaper to heat with gas.
One thing that is overlooked in the above arguments is that with both electric resistance heat and gas heat, the incoming energy must supply all of the heat. On the other hand, with a heat pump, the heat comes from the outside air, and the electricity is used only to move it inside. It works as an air conditioner in reverse. In this way, you can actually get more heat energy out than the energy coming into the house. The disadvantage is that heat pumps don't work if it gets too cold outside. The older ones would only work down to 0 degrees C, but I think some newer ones may work down to 0 degrees F.
The answer to the question really depends on what the climate is where you live. There's a book by Tretheway that you may find at your public library, to go into detail on the pros and cons of various systems.
A properly constructed well insulated house is the key to lower costs, no matter what you choose.
AnswerGoing one step further, a geothermal heat pump should be most cost effective in the long run. These work just as in the second answer above, but the heat comes from ground water, which is a fairly constant temperature of about 55 degrees. This allows a much more efficient heat pump without the air temperature limits above. liquid is a great medium for heat transfer, so the heat exchanger is inside with a pump, not a big noisy fan.The cord of an electric oven does not glow while the heating element glows.Why?
The cord is manufactured to have as low a resistance as possible, while the heating element
is intentionally manufactured with a carefully controlled resistance.
The current through the whole loop ... cord plus heater ... is determined by the resistance of the whole loop.
The magnitude of the current 'I' is (E/R) ... E = the utility line voltage, R = resistance of the cord+heater.
But the power dissipated by each individual resistance in the loop is proportional to the resistance
of that section. P = I2R. So the heating element dissipates more power than the low-resistance
line-cord does.
How much does it cost to wire a 280 sq ft garage with four 110v outlets and one 220v outlet?
Depends on many factors. Are you wiring it yourself. If so that will save you probably $300-$500. Do you need to install a service panel? If not and you have an existing panel with enough space to tap into, this will save you around $200. Use a 20 amp breaker for the 110 circuit and a breaker that matches the 220 circuit. Probably a 30 amp. The wire will cost you around $75 and you must use 12/2 with ground for the 110 volt receptacles. The 220 V receptacle will need to be wired with at least 10/2 or 8/2 depending on the device you plan to plug into it. The device will list the requirements. The 3 110 receptacles, covers, and mounting box will cost around $5 each. The first receptacle you run to must have a GFIC receptacle installed and the home run from the service panel connected to the Line side. The other 3 receptacles connect to the Load side. That one receptacle will cost around $20. The 220 receptacle will be around $15. Add for lights and one switch if you want them. I would say you could wire this yourself for less than $500 at the most if you do not have to install a service panel.
How do you determine the number of conductors per phase?
The number of conductors is simply the service amperage divided by the desired wire size's ampacity rounded up if there is a remainder. Example: 1000A service, using 300kcmil conductors at 75 deg C: 300kcmil ampacity in this situation is 285. 1000/285=3.5 Since you can't have 3.5 conductors, you must round up to 4. This would give you a total ampacity of 285A x 4, or 1140A. If you're rounding farther than necessary, such as in this case, you can try using the next smallest conductor and adding another set to closer match your required ampacity. 250kcmil ampacity is 255. 1000/255=3.92 We will also round this up to 4, but we aren't rounding as far as the earlier example. The total ampacity is now 1020. 250kcmil x 4 sets is probably the best arrangement for this 1000A service. You could use larger wire and fewer sets, but smaller wire is more cost effective for both ampacity per pound and labor costs for installation.
What is the conduit for both air and food?
The pharynx is the conduit for both air and food. It serves as a passageway for air from the nose or mouth to the trachea for respiration, and for food from the mouth to the esophagus for digestion.
How much do the ENIAC wires weigh?
The ENIAC, while not all the information is available, had about 70,000 resistors, which are small electronic components. Considering their size and standard weight, the total weight of all the wires in the ENIAC is estimated to be around 7-8 tons.
