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Electrical Wiring
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To calculate the total power in watts used by a service panel with three-phase power, you would multiply the average current for each phase by the voltage and by the square root of 3 (√3 or approximately 1.73). This accounts for the fact that power in a three-phase system involves the line-to-line voltage and the square root of 3 relationship. So, the formula for total power (in watts) would be P = (Iavg x V x √3).
Don't worry about it some fixtures have no ground terminals. just shove the groung wire to the back of the box.
Correction, if the fixture is metal and it shorts out, the metal surrounding the fixture could become electrified. That's why fixtures today are normally grounded to their mounting plates and then the lead is attached to the incoming romex. In the past, attaching these plates to metal boxes (either grounded by an incoming wire or grounded to the BX cable) eliminated the need for a ground wire. If the hot wire hit or shorted to the fixture, it would blow a fuse or circuit breaker. Many electrocutions and fires later, the folks at Underwriters realized that even that method of grounding wasn't sufficent (the old aluminum boxes and bx cables were crappy conductors. Solution; (and I practice what I preach because I remodel many old homes) get a little creative and spend the extra time to wrap a little ground wire to a mounting screw, or piece of metal, on the mounting plate of the fixture and then attach it to your incoming romex ground. On an old fixture, it could mean the difference between a fire and a tripped circuit breaker. If you have any metal boxes, old or new, ground to those too.
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Connect a pigtail to the metal canopy, and use a wire nut to connect the safety ground to it.
How much electricity does an average restaurant use per month?
The cost for electricity for one year for a club restaurant and bar depends on a variety of factors. The local cost of electricity per kilowatt hour is one important factor, and the size of the club is another. Typically you can expect that the electricity will cost at least $1,000 a month.
Why can uncontrolled electricity be so dangerous?
Uncontrolled electricity can be dangerous because it can cause electrical shocks, which can disrupt the heart's rhythm and lead to cardiac arrest. It can also cause burns, fires, and explosions. Additionally, uncontrolled electricity can damage electrical devices and infrastructure, leading to costly repairs and downtime.
What difference in current amperage makes an RCD trip?
RCD stands - Residual Current Device. Normally It measures current on phase & neutral and if there is any change or difference (Should be Phase I - Neutral I = Zero) even 30mAmps RCD trips to break the circuit to avaoid any damages to equipments as well as human beings. Its same as ELECB / RCCB.
Does a circuit breaker work because of too much charge?
Saying the answer to that question is "Yes" would be incorrect, but, equally, saying the answer is "No" would also be incorrect!
In asking about charge the question is asking about the wrong electrical unit because some charge by itself won't trip a circuit breaker: the charge has to flow at a high enough rate to cause the circuit breaker to trip.
A circuit breaker works because it is designed to trip to cut off the flow of current if and when that current exceeds a certain amount.
The rate of flow of charge is called an electrical current.
An electrical current is measured in amperes - "amps" for short.
One ampere is equivalent to a flow of charge of one coulomb in one second.
Equally, one coulomb is defined as: the charge transported by a steady current of one ampere in one second.
One coulomb is also defined as: the amount of excess charge on the positive side of a capacitance of one farad charged to a potential difference of one volt.
What is a 3 way electrical outlet plug?
Usually referred to as a 3-prong plug if we are talking about a normal home electrical issue. It is a "male plug" which fits into a "female receptacle". It has one rounded prong (Earth ground) and two spade like prongs which are "Hot" and "Neutral". The orientation of the third grounding prong insures that the Hot and Neutral are corrected properly to your appliance. This is most important when the appliance has a metal outside to reduce shock hazard.
In typical installations Black wire is connected to Hot, White to Neutral and Green to Ground. Neutral and Ground are bonded together at your electric box so at any outlet the resistance (as measured by an Ohm Meter) would be quite low.
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A three-pin plug contains of neutral plug(left),live plug(right)and earth plug(up).The live wireis usually in the color of brown while earth wire is in the colour of green and yellow,and neutral wire is in the colour of blue.Live plug is connected with the elctrical supply.The live wire carries a voltage which drives an electric current through the electric appliance.The neutral wire offers a re-turn way for electric wire while the earth wire is a safety deivce.It protects us from electric shock in case an electric appliance is faulty.
How do you run a split circuit 15amps?
Split receptacles
Split receptacle installations can be found in kitchen counter receptacles. These types of receptacles are fed with a #14 three wire from a two pole 15 amp breaker. The top part of the duplex receptacle is isolated from the bottom half of the duplex receptacle by removing the brass coloured tie bar that joins the two halves together. The top part of the receptacle is fed with a full 15 amp capacity by using the black and white wires of the three wire cable and the bottom half is fed with a full 15 amp capacity by using the red and the same white wire of the three wire cable. This allows two appliances to be plugged in to the same receptacle.
SAFETY ADVICE
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 REALLY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
If this is an extension cord or an appliance cord with molded-on ends, don't rely on the color! I have seen cords where the colors were not correct. If the manufacturer accidently uses the white for the hot, as long as both ends are the same, the cord will work. But if you cut into the cord, say, to put on a new end, and you use white for neutral, and the other end uses it for hot, someone willl get hurt. Best to use a continuity tester or multimeter to make sure which color is wired to the neutral prong. But yes, normally white (in the US) is used for neutral. 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.
What is a safe distance between 110V electrical wire and coax cable when installing inside drywall?
A safe distance between a 110V electrical wire and a coax cable when installing inside drywall is a minimum of 2 inches, to reduce the risk of interference and potential electrical hazards. It is also recommended to use separate drill holes or protective conduit to further ensure safety and proper functionality of both the electrical and coaxial systems. Consulting with a professional electrician or installer is advisable for specific guidance and compliance with local building codes.
A one switch is called a toggle switch. It is a simple mechanical device that can be flipped or toggled between two positions to control the flow of electricity in a circuit.
How do you convert a 240V outlet to run 120V?
=== === == == === === Most homes and businesses are already wired for 240V at the main incoming supply breaker panel.
You just need to have a licensed electrician install an new 240V circuit, including the proper sized wiring and breakers. This would handle larger current loads and be much safer for you and anyone else in your household to use - and for anyone else after you have moved out. <><><>
The best advice anyone should give you is to call a licensed electrician to install a new 240 volt power outlet for you.
He will use the correct size of wire for the 240 volt appliance you want to use -- A water heater? A clothes drier? A kitchen range? -- and connect it to the correct sizes of circuit breakers on the main panel and also a GFCI safety device to protect users from electrocution if the room is likely to be damp or have water spray or wet floors, walls or ceiling, such as a laundry room or a kitchen.
Then you would be able to use a 240 volt appliance safely in the room in question. 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. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
How do you attach a 4 wire power cord to electric dryer?
in back of dryer u should have a block with three wires 2 blacks 1 green the one u are trying to wire up should have 2 black 1 green 1 white the white and green wire go in the midle post of the block on the dryer and the other 2 wires go to the out side posts of the block
What is the use of neutral wire?
The neutral wire is a return wire for the current in an electrical circuit. Do not confuse for the ground wire which is also a return wire but is used in the event the connected appliance shorts to protect the user from electrical shock. The neutral is actually very similar to the ground, though. In a residence the neutral comes from the power plant, whereas the ground comes from a ground rod below the meter. In most older homes the ground and neutral were connected to the same bar in the breaker box. In newer homes they now have separate bars. Here is something interesting about the neutral wire. If you are testing a live circuit using a static checker, the neutral will not show a charge, only the hot wire will. However, if you had a circuit controlling some device (maybe a light fixture) and the light fixture was in the on position, but the neutral was cut you would notice the two wires slightly sparking when you touch them together. If you were to complete this circuit with your body you will get shocked or electrocuted. If the device were in the off position you would be safe, but don't take any chances when working with electricity. Turn off the power first.
What is the wire coming out of the electric meter?
If you have a copper wire coming out it would be a"ground." This wire is there in case there is crossed wires inside the meter. It allows the electricity to seek the shortest route to the ground through the wire instead of through something dangerous or distructive.
What are the colors in american electric cords?
If you are talking about electric extension cords they come in a variety of colours. Black, blue, yellow, red, and orange to name a few. Usually the colour is associated with a particular manufacturer.
For more detailed information about the colors of the wiring inside the cords, see the answer to the Related question shown below.
What is maximum distance 10-2 wire can be run to a dryer?
NO!
Obviously you can attempt to do this but it is NOT SAFE to do it!
You could drive on the wrong side of the road but it is NOT SAFE to do it!
You could put your hand into a fire but it is NOT SAFE to do it!
A dryet outlet is only safe to use for one purpose: to power a dryer.
For more information please see the Related Questions shown below.
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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.
Does a shunt trip breaker work from a dry set of contacts?
Yes, but you need a power source, for the shunt trip coil voltage, in the circuit.
Is there still current in the overhead wires that lead to a house when the house electricity is off?
Assuming there is not a "power outage" to all houses in the area (otherwise known as a "power cut") then the answer is:
Yes, the potential (voltage) is still in the overhead wires that lead to a house when the house electricity is only turned off at its own main switch inside the main breaker box.
The line side of a switch is the?
The line side is where the source of the voltage is connected. The load side is where the device being switched is attached. In the case of a light switch the line side would connect to the house power and the load side would be the bulb.
The switch is usually inserted in the line carrying the load (or black wires). As it it common to use 12-2 wiring to run from the device being switched to a switch on the wall, the return wire can be colored white. A electrician places an identification on the wire to signal that it is a "hot wire" even though it is white. Typically the electrician will wrap the white wire with black tape for about 1 inch to indicate this. A white wire is normally considered to be neutral if it is not identified as a "hot or load wire".
Can you have 2 3-phase sockets off the same supply?
yes you can.
for example in a 380V 3 wire system the 4th wire or neutral gives 220 volts against each of the 3 phases so you can have 3phase 380 volt plugs as well as 220 V single phase plugs.
ah and by the way you can have as many 3 phase plugs as you like or as the power supply can support ampere wise.
Sounds as though your saw is a 220 volt saw. If so then yes if you run a 2 conductor BX cable you will employ the black and white conductors in the cable as the two "hot" conductors. So just wire black to black, and red to white. However, you should be running a 3 conductor cable to provide a ground to your saw.
Can a 277 unit heater be supplied with 240 volts?
No, a 277-volt heater cannot be safely operated with a 240-volt power supply. Matching the correct voltage is essential for the safe operation of electrical devices. Using a lower voltage than the device is rated for can lead to insufficient performance and potential damage.
