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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
Does a double 30 amp breaker mean you have 60 amps for a 220 outlet?
breakers are rated by wire size, not voltage. the appliance manufacturer will probably specify amperage.
Can you connect a 230 volt 15 amp air compressor to a 240 volt 50 25 amp generator?
No, it is not safe to connect a 15 amp air compressor to a 25 amp generator. The generator's output exceeds the maximum amperage of the air compressor, which could potentially damage the compressor or cause overheating. It is recommended to use a generator that matches the power requirements of the air compressor for safe operation.
The line If hairs be wires black wires grow on her head contains an example of?
This line contains a metaphor, comparing the person's hair to black wires. Metaphors are figures of speech that make direct comparisons between two unlike things to highlight similarities.
One problem when using rigid metal conduit in a residence is that installation of the conduit may?
One problem of using rigid conduit in a residency when it is not needed is that project will very quickly over run the budget of the project. Labour will be at least 5 times more expensive to install rigid over NMD90 cable.Another problem will be the tight bends required in home wiring as compared to the radius bends that rigid conduit requires.
All three wires, the "hot", neutral and the ground must all maintain the integrity of the circuit. This is why pigtails are connected from the main circuitry to the receptacle or switch devices so that they can be removed without opening the electrical circuit.
How many outlets can go on one breaker?
The number of outlets on a 15 or 20 amp circuit depends entirely on what you will plugging into those outlets. If you are plugging in an appliance that will pull 10 amps then you cannot also plug in another one taking 15 amps!
Many different combinations are possible, for example a 15 amp circuit may have 15 outlets but only 2 are being used at any one time, such as a floor lamp and a TV.
Generally speaking, most homes have 8 to 10 outlets per a 15 amp circuit. Not all outlets are used at the same time, a lamp here, a TV there, not too much. Regarding lights, you need to add up all the amps pulled by all fixtures on that circuit. The total amps pulled should not exceed 80% of the circuit breaker's maximum amperage.
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There is an allowance of 180 watts per outlet for 120 volt convenience outlets.
It is required that a continuous load [operating over 4 hours] be served such that the circuit is not loaded past 80% of its capacity, which would allow a continuous 16 amp load on a 20 amp circuit. If there were 2 loads planned, the combined continuous load could not exceed 16 amps between both devices.
See NEC [NFPA 70, 2005 edition - National Electrical Code (c)] Article 210, sections 210.20, 210.21 and 210.23.
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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
How many watts will a 20 amp douple pole breaker handle?
The formulae for calculating watts to amps is Watts divided by Voltage. Therefore to get from Amps to Watts the calculation is Amps × Voltage. Therefore if you are working on a 240 volt supply the calculation is 20 (Amps) × 240 (Volts) which = 4800 watts.
Can you use a single pole 30 amp breaker for an electric dryer?
This could be due to a fault in the wiring or the outlet itself, causing the metal surfaces to become live with electricity. It is important to turn off the power to that outlet immediately and have a qualified electrician inspect and repair the issue to prevent the risk of electrical shock or fire.
How many amps would A elec fireplace that is 1500 watts draw?
By the definition of power which is (p)=IV, if a 1500 watt Electric Fireplace is plugged in a 220v AC source, the expected current will be (I)=P/v. ie 1500/220=6.8A This is when the power loss due to cable resistance is neglected.
How much is a 250 watt amp worth?
Two bucks!!! It's worth whatever someone is willing to pay for it, just like anything else in a free market economy.
How many watts does a stereo have to have to run a 1500 watt amp?
My personal rule of thumb is that the amp should be at least 40% more powerful than the speaker(s) it's driving. So, if your sub is 1500W RMS, then mathematically, you'd need approximately a 2100W RMS amp. Some people just match it evenly - in that case you'd need a 1500W RMS amp. Whatever you do, DON'T use an amp less powerful than the speaker. If you do, you will probably kill the speaker in a short period of time. :(
Can a hair dryer trip a gfi receptacle?
Yes, a hair dryer can trip a GFCI receptacle if there is a ground fault, electrical short, or moisture present that triggers the GFCI's safety mechanism. It is important to ensure that the hair dryer and the outlet are in good working condition to prevent tripping the GFCI.
What size pipe for a 150 amp 3 phase sub panel?
For a 150 amp 3 phase sub panel, you would typically use a minimum of 1.5-inch conduit size to accommodate the necessary wiring safely. It's important to verify with local building codes and regulations to ensure compliance with specific requirements for your installation.
Is conduit required for basement electrical outlets?
Conduit is not always required for basement electrical outlets, but it can provide added protection for the wiring and enhance safety. Checking local building codes and consulting with a qualified electrician is recommended to determine the specific requirements for your location.
Is it safe to use both 14-2 and 12-2 wires on a 15A circuit?
(LIFE SAFETY WARNING! [disclaimer]
Electricity is dangerous!
You can be injured or killed!
Improper installations can cause fire, injury and death!
Should you be doing this yourself?)
This is one of those questions - if you know this little, you shouldn't be doing 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.
According to the NEC, you can utilize any conductor with suitable insulation for any application for which the conductor is rated for the use.
The limitation to the gauge size of conductor is that it be AT LEAST as large as that called for in the conductor tables, based on current, ambient temperature and conductor grouping!
ALWAYS CHECK WITH YOUR LOCAL WIRING SAFETY OFFICE BEFORE YOU ATTEMPT TO CHANGE ANYTHING ON POWER MAINS OUTLETS
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 electricians test meter having metal-tipped probes
(not a simple proximity voltage indicator)
to insure the circuit is, in fact, de-energized.
Milliampere-hour (mAh) is a unit of electric charge, while ampere (A) is a unit of electric current. The relationship between them is that 1 Ampere = 1000 milliamperes. So, 1 ampere-hour (Ah) equals 1000 milliampere-hours (mAh).
The bare copper wire is a ground wire. if your old electrical system only has black and white, then you don't have a ground wire to hook the new fixture's ground to. Safest bet is to run a ground wire to that junction box (or hire an electrician to do that). If the box in the ceiling (I'm assuming its a ceiling fixture) is metal, the home's electrical system ground wire may be attached to the metal box itself. If that's the case, you simply need to attach your new fixture's ground wire (the bare copper one) to the metal box. If in doubt -- have an electrician look at it.
The thing to consider here is the current rating of the baseboard heater. If the baseboard heater is 240 volt then yes you would need to use a two pole breaker. If you are using just one heater on the circuit, the current rating of the heater is low enough that you could use a two pole breaker rated at 15 amps and copper wire rated at #14 . The rating of the thermostat is the maximum that the stat will handle safely. With the combination you suggest you could run a total of 3800 watts of baseboard heaters. In amps this would be 16 and well within the rating of the stat.
What is the princinple of electric water heater?
On a 240 volt hot water tank there is only one of the two elements on at any one time. The incoming cold water is taken to the bottom of the tank through a pipe inside the tank. When the lower thermostat senses the cold water, the lower element turns on. As you draw hot water from the top of the tank the cooler water from the bottom will rise. When the top thermostat senses the cool water it shuts off the bottom element and turns on the top element. When this water is heated to the tank set point it shuts off and the lower element turns on to heat the rest of the water. When the total tank temperature is at the set point all elements turn off. By using this type of procedure there is always hot water at the top of the tank for use.
You may either need a different shape box or an adapter plate to properly align the holes with your new light fixture. It's important to ensure that the junction box is compatible with the chosen light fixture for safety and proper installation. Consulting with a professional electrician can also help determine the best solution for your specific situation.
No, you should not install a 30 amp circuit breaker to a machine which normally requires a 20 amp supply. The circuit breaker is protecting the wire to the machine. That wire is likely only rated for 20 amps, (# 12 awg). Therefore, a 30 amp breaker could allow too much current to go through the wiring to the machine and cause the wire to burn down. Replace the 3 phase 20 amp breaker with the same amperage breaker.
What happens if you wire a ground and neutral wire together in an outlet box?
If there is a GFCI in the circuit it will stop working correctly. They compare ground current to neutral current to detect a fault. It makes ground current equal to neutral current which is a fault condition.
450' run with 200 amp service what size wire direct bury?
For a distance of 450 feet, you would need, 2 sets of #4/0 (parallel 6 conductors) for aluminum, or 1 set of #350 copper.
80% loading of service and a 3% voltage drop.
Consult your local power company for exact requirements of their codes.
Power in watts is current x voltage
For 120 volts it would be .71 x 120 = 85 watts
