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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
Why do light fittings in a bathroom use a pull cord rather than an ordinary wall switch?
Pull cords for bathroom light fittings are a safety feature as they help minimize the risk of electric shock when hands are wet. Additionally, pull cords are easy to reach and operate, making them more convenient for turning the light on and off in a bathroom setting.
What is the rating of domestic electric wiring?
Domestic electric wiring is typically rated for a voltage of 120 to 240 volts and a current capacity ranging from 15 to 20 amps for standard residential applications. It is important to consult with a qualified electrician to ensure that the wiring meets the specific needs of your home and adheres to safety standards.
Can you connect a wall switch and a light fixture to an existing light fixture?
If the question is, can I wire a switch to an existing light fixture (and I must assume that it's something like a pull-chain light fixture), the answer is yes.
If the question is, "how do I wire a switch to an existing light fixture that has no external switch", the answer is, "in series".
The attached web site gives simple instructions on how to wire a basic light switch to an existing light.
See sources and related links below
How many volts does it it take to arc 0.5cm?
It typically takes around 30,000 to 50,000 volts to create an arc of 0.5 cm in air. The exact voltage required can vary based on factors such as humidity and air pressure.
Are watts and amps the same measurement?
No they are not. Voltage measures the potential difference between two conductors, while watts are a meaure of power, which means the rate at which energy is used.
In an electrical circuit the power in watts is the voltage times the current in amps.
So in a car with a 12 v system, a 6-watt bulb draws ½ an amp, while a 60 watt bulb draws 5 amps.
Can you tap into a 40 amp electric range outlet for a 15 or 20 amp wall outlet?
It is not recommended to tap into a 40 amp electric range outlet for a 15 or 20 amp wall outlet as the wiring and circuit capacity may not be compatible. It is best to consult with a licensed electrician to determine the safest and most appropriate solution for adding a new outlet.
What is the amp and voltage rating for number 6 gauge wire?
Number 6 gauge wire typically has an ampacity rating of around 55-75 amps and a voltage rating of 600 volts. These ratings may vary depending on the specific type of wire and the regulations in your area. It is important to consult the National Electrical Code (NEC) or a qualified electrician for accurate information.
What appliances require 20 amp circuits?
Answer for UK, Europe and countries running a 50 Hz supply service.
There are quite a few appliances that use a 240V line. Air conditioners, fridges, washers and dryers all use the 240V line.
Answer for Canada, USA and countries running a 60 Hz supply service.
In North America only the larger appliances use 240 volts. The hot water tank, stove, range top, baseboard heating and clothes dryer are the main appliances that use the higher voltage.
What size ground wire for 800 amp service?
For an 800 amp service, typically a 3/0 or 4/0 copper conductor or 250kcmil aluminum conductor would be appropriate for the grounding wire. However, it is recommended to consult with a qualified electrician or the local electrical code for specific requirements based on the installation conditions.
Why 12 AWG THHN cannot be for 30 amps in the national electrical code?
A 12 ga wire will overheat when you attempt to use it for a 30 amp draw.
The National Electrical Code is a well thought-out standard of engineering and the requirements are not arbitrary.
If you attempt to use 12 ga for 30 amps, you'll likely cause a fire.
What must be attached to the top end of a conduit riser where conduit is used in a service?
A service head or LB fitting must be attached to the top end of a conduit riser where conduit is used in a service. This provides a termination point for the conduit and allows for easy access to the conductors inside the conduit.
In what type of system must the switch always interrupt the hot wire?
You switch the hot side instead of neutral, because there is a shock hazard otherwise. If a fault caused hot to connect to a metal part on the device, you would get shocked touching the metal part. Sometimes a double pole switch will switch both hot and neutral in special applications. It is never a good idea just to switch neutral.
Would a 12 volt battery need to use a capacitor to run a 1000 or 760 watt amp?
I have a 760 watt amp powering 2 10" subs and it works fine. my brother has a 1000 watt amp powering 2 12" subs and he got a capacitor. So it really depends on what amp your looking at. if the 760w you wont need one, if the 1000w i would be safe and buy a capacitor. for the 1000w amp you would only need a 1 or 2 farad capacitor.
You can test for 60 hertz using a multimeter set to measure frequency. Connect the multimeter probes to the power source, and it will display the frequency. Another option is to use an oscilloscope to measure the waveform's frequency. You can also use a frequency counter to directly measure the frequency of the power source.
Can you use a 15 amp fuse instead of 20 amp?
15 amp fuses are available in many different sizes and types. The correct answer to your question will depend on the type of circuit and the voltage and power rating of the electrical equipment which the fuse has to protect. Asking this type of question usually means you aren't yet ready to select fuses yourself.
Study some books about electrical wiring and appliances - and maybe also some electrical engineering technical textbooks - but in any case be sure to read and learn from your country's Wiring Regulations - in USA that is the National Electrical Code - and work out the answer to this question for yourself. If you get any answer here, you might attempt to do something you shouldn't be doing,
and that may cost someone a shock, a home fire, or their life. <><><>
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.
Is ribbed wire black or white?
Ribbed wire typically comes in black color for easy visibility and identification. However, it can also come in white or other colors depending on the manufacturer's specifications or application requirements.
How many watts is a 1000 amps?
Amps are not directly convertible to horse power, which is a measure of power. Power is current times voltage. Therefore on a 240 v supply, 1000 amps equals 240,000 watts. One horse power is 746 watts.
How many watts equals 1 ampere?
You cannot convert watts to amps, since watts are power and amps are coulombs per second (like converting gallons to miles). HOWEVER, if you have at least least two of the following three: amps, volts and watts then the missing one can be calculated. Since watts are amps multiplied by volts, there is a simple relationship between them.
There is a device in the market that allows you to trace the circuits. The device plugs into the outlet and transmits a high frequency signal over the circuits wires. The receiving device is brought into close proximity to the individual breakers in the distribution panel and when it senses the transmitted frequency it will go into an alarm state. This breaker will be the one that powers that particular circuit that the transmitter is plugged into. One that should work for you will be around $50.00. See related links below
No, the electrical code disallows distribution panels to be used for splicing of conductors or to be used as a raceway for through conductors. Some inspectors will allow the use of butt splices, properly installed with the correct tool and finally wrapped with electrical tape. Before the job is started inquire at the Electrical Inspection Agency for their thoughts.
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You will be better off to splice the wires at some point outside the panel in a junction box (J-box). This method will be legal under most (perhaps all) electrical codes and will allow easier access.
What size wire would be required for the power supply of a compressor at 45 amps?
8 AWG.
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Electrical code wire sizing for motors has to be at 125% of the rated motor current. So the wire has to have the ability to handle 45 + 11.25 = 56.25 amps.
A #6 copper conductor with an insulation rating of 75 or 90 degrees C is rated at 65 amps.
What size amp ciruit breaker should used for a 220volt hot tub?
Typically, a 50-amp circuit breaker is recommended for a 220-volt hot tub. However, it is important to verify the manufacturer's specifications for the hot tub to ensure the correct breaker size is used. It is recommended to hire a licensed electrician for installation to ensure safety and compliance with local building codes.
What current is drawn by a 10KVA 415V 3 Phase Load?
10000 = 415 * i
i = 10000/415 = 24 a
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The formula you are looking for when KVA is known is I = KVA x 1000/1.73 x E = 10000/1.73 x 415 = 10000/240 = 41.6 amps.
How many watts does a 15 amp breaker provide?
In a residence assume you are referring to 120 volt supply. Watts = amps x volts x Power Factor. Now Power factor is one for resistive loads like incandescent light bulbs. Power Factor can vary from zero to one when inductive loads like motors are added. So the maximum theoretical wattage would be about 15 A x 120 V. However, you de-rate a breaker to 80% of capacity so as not to continually trip breaker. Therefore, the answer you are looking for in a practical sense is 120 x 15 x .8 = 1440 watts or 1.44 kilowatts.
What happens when you plug a GFCI protected extension cord into an outlet that is GFCI protected?
When a GFCI-protected extension cord is plugged into an outlet that is also GFCI protected, it provides an additional layer of protection against electric shock. Both devices work in conjunction to quickly detect any imbalance in the electrical current and trip the circuit if necessary. This redundancy helps ensure increased safety against electrical hazards.
