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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.
500 Questions
What is the point of grounding your house?
Asked by Wiki User
All electrical distribution systems require a system earth ground for personnel safety. The ground for your home electrical system is likely a grounding rod, a 10 ft. copper clad steel rod driven into the ground and then bonded with a brass clamp and large bare ground wire to your panel. This provides a path to ground to dissipate errant current which can occur due to a circuit which "shorts out." Better it goes to ground than into you!
Can you put breaker panel in a bedroom?
Asked by Wiki User
Yes.
But the NEC requires that your first disconnect be installed as close as practical to where the service enters the building. So if the bedroom isn't where the service enters the home, you will have to install a stand-alone disconnect where it does and then wire to your panel.
How do you tell a positive wire from negative wire?
Asked by Wiki User
A Discussion has been started about this Question and Answer.
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=== === <><><> If you needed to ask this question here, one of the most important things you must learn is how to use an electrician's multi-meter correctly and safely. This is one of those questions... If you know this little, you shouldn't be planning to do what you are planning... No disrespect intended, but this is SO basic that it suggests you have not studied the subject at all! There are many good reference books and course books to study from. === === <><><> This question is not as easy to answer as you may at first think. It all depends if you really know what you mean when you say "a positive wire" and "a negative wire". Are you asking about an AAA cell or are you asking about mains voltage alternating current? So take the advice given above and learn how to use a multimeter - safely - to measure voltages and currents used by electrical items or systems. Some of them use direct current power supplies, such as dry cells or batteries; other things use alternating current power supplies such as 120 Volt or 240 Volt power mains. You really need to know about both types because none of them are safe to play with, not even the simplest dry cell or battery. If you want to ask this type of question again please be sure to say: * exactly what type of electrical item or system it is that you want to know about
and
* where those wires are on (or in) the item or system that you are curious to know about which wires are positive or negative. Then someone may be able to help you by giving you a more specific answer.
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 an electrician's test meter having metal-tipped probes
(not a simple proximity voltage indicator)
to insure the circuit is, in fact, de-energized.
What size aluminum wire needed for 60 amp at 240 volt for 330 feet underground?
Asked by Wiki User
A 1/0 AWG aluminium conductor will limit the voltage drop to 3% or less when supplying 60 amps for 330 feet on a 240 volt system. The cable will be rated as ACWU 90. ACWU 90 cables are primarily intended for exposed and concealed wiring in dry or wet locations and where exposed to the weather. For use in ventilated, non-ventilated, and ladder type cable trays in wet and dry locations; direct earth burial; service entrance above or below ground.
Is it necessary to ground at all metal junction boxes when using metal conduit or cable?
Asked by Wiki User
In a completely metallic conduit system it is not necessary to ground each junction box as long as the metallic system has the grounding capacity rating larger than that of the over current device protecting the circuit. The code book states what size conduits are rated at, for grounding amperages.
Where are gfci outlets required?
Asked by Wiki User
GFCI receptacle's must protect any outlet that is within 6 feet of a water source, outside the home, in a garage, on a deck, in a sunroom, in a bathroom, unfinished basements, kitchens, & crawl spaces.
How you can find the 4000 amp on bus bar size?
Asked by Wiki User
There are two temperature categories for copper buss bar. For a 30 degree C rise the sizes are 1/4" X 1" or 3/8" X 3/4". For a 50 degree C rise the size is 1/4" X 3/4". Both of these temperature categories will handle 400 amps.
What size wire for 240 volt 1 phase compressor?
Asked by Wiki User
If you have to ask here, you shouldn't be trying to wire in a 20A compressor. You will require a special circuit for the voltage and current with an independent breaker.
Check your local code for the wire size or talk to a qualified electrician.
How many watts does a 500Lt deep freezer use?
Asked by Wiki User
The average deep freezer or chest freezer uses about 130 watts. There are some energy saver models that might use less wattage.
How many amps will 10-2 wire carry at 40 feett?
Asked by Wiki User
30 amps is how much a 10-2 wire will carry at 110 feet. 10 gauge wire is only good for thirty amps per the national electrical code. Using 80% of the breakers usage you will actually be getting only 24 amps.
What is the amps for 6000 watts 415 volts 3 phase heater?
Asked by Wiki User
There are zero amps in a 6kW 3 phase heater. Amperage is the result of dividing the Watts by the Voltage. A = W/E. Without stating the voltage the heater operates on the amperage can not be calculated.
How many watts will a 20 amp two pole breaker handle?
Asked by Wiki User
Answer for USA, Canada and countries running a 60 Hz power supply service. Watts= voltage X amps At 120 volt total watts would be 2400 at 20 amps. The electrical code states that circuit conductors that are fed by this breaker on a continuous load can only be loaded to 80%. #12 wire rated at 20 amps, derated to 16 amps continuous = 16 x 120 = 1920 watts, #10 wire rated at 30 amps derated to 24 amps continuous = 24 x 120 = 2880 watts. On load calculations this derate should be taken into consideration. To maintain the required wattage needed for the load the wire size and/or the next size breaker may be needed.
What size ground wire needed for a 200amp service panel in new jersey?
Asked by Wiki User
#6 bare copper wire.
What is transformer polarity?
Asked by Wiki User
'Polarity' describes the sense (direction) in which the voltage (not current!) induced into secondary winding is acting, relative to the sense in which the voltage applied to the primary winding is acting.
In North America, a transformer's high-voltage winding terminals are identified by the letter H, and the low-voltage winding terminals by the letter X. In the case of a two-winding transformer, the pair of high-voltage terminals are marked H1 - H2, and the pair of low-voltage terminals are marked X1 - X2.
When the potential of HV terminal H1 'goes positive' (i.e. during the first half-cycle of AC), if LV terminal X1 also goes positive at the same time, then the transformer is an 'additive polarity' transformer. On the other hand, if terminal X2 goes positive at the same time as H1, then the transformer is a 'subtractive polarity' transformer.
Knowing the polarity of a transformer is very important if you intend to operate transformers in parallel with each other (there are other factors, too, of course), in the same way as it is important to know the polarity of a battery before you can connect it in parallel with another battery.
What is the correct wire size for 40Amp range?
Asked by Wiki User
40 awg
<<>>
The above answer is incorrect. A #40 wire is smaller that telephone wire which is #22 awg.
A #8 copper conductor with an insulation factor of 60 degrees C is rated at 40 amps. For a built in safety factor, a #8 conductor with an insulation factor of 75 or 90 degrees C has a rating of 45 amps.
What size wire for 100 amp panel in detatched garage?
Asked by Wiki User
i just left lowes an they told me to run 100 amp to my building i would need wire size 2-2-2-4 alumninum and run it in conduit the lowes around here does not sell copper wire that size
One watt is equal to how many voltage?
Asked by Wiki User
The watt is a measurement of work done by an object at constant velocity and under constant force. 1 watt, therefore, is equal to 1 Joule per second.
Why does your GFCI trip when you plug in the refrigerator?
Asked by Wiki User
A GFCI trips whenever it senses a grounding problem. Not grounding the outside surface of radios, fans, fridges, metal lamps and hand tools can put 120 volts on the device where you can touch it and possibly be killed.
The GFCI trips so you will not be killed. Best to have an electrician check out your fridge. If it is OK, then the GFCI may be at fault.
What is the distance from the floor for a bedside light switch?
Asked by Wiki User
in the USA if following the NEC there is no specific requirement for wall switch heights for general lighting There may be requirements for machinery
How many volts is 4500 watts?
Asked by Wiki User
4500 watts is zero volts. To obtain a voltage from watts it has to be divided by an amperage.
What is the spacing from the light switch to the shower?
Asked by Wiki User
YOU NEED TO REPHRASE THAT QUESTION.
