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Electrical Wiring
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4,935 Questions
What does it mean iso 90019002?
ISO9001 and ISO9002
Mean:
Industry Standardisations Organisation 9001
They are reference numbers to Quality Systems.
9001 and 9002 refer to Quality Systems.
You may also see numbers like: ASNZS9007
This stands for Australian Standards, New Zealand Standards 9007
These ISO standards are both part of the ISO 9000 family of standards. ISO 9001 mainly focuses on the requirements of organizations that intends to meet the set standard by ISO. On the other hand, ISO 9002 is basically the same with ISO 9001 but doesn't cover the creation of new products aspect.
What are the pros and cons of load shedding?
Original use was in the 50's when a stove and dryer was installed but the service could not handle both. The load shedder would automatically turn off one of the appliances so the other could run.
Industrial shedding could be multiple air compressors. As the pressure in one is close to minimum, another would be stopped to allow the low one to start.
Allowing more machinery to be connected to a service than it could handle without load shedding.
Disadvantage is that the shedded load may be necessary.
What if in 3-phase connection load is not balance in three phases ie RYB?
due to unbalance load 1. Due to negetive phase sequence components in current generator and transformers suppling the load will be over heated 2. The opposite torque on the shaft will damage, rotors are more likely to damage. 3. High current through neutral of the system, normally neutral cable conductor is of lesser size then phase and hence it may be damaged.
Is silicone a conductor of electricity?
Silicon can conduct electricity, but not nearly as well as copper does. The conductivity of silicon depends a great deal on what is mixed with it, because this affects how tightly it holds on to its outer electrons. Silicon is the main ingredient in glass, which does not conduct electricity. Silicon is also used to make semi-conductors, which do conduct electricity, but still not as well as copper does. (That's why they're called semi-conductors instead of conductors.)
<><><> It is a semiconductor and can be controlled by doping it with Arsenic, Indium, Gallium, etc. to become an insulator or good conductor when applying a voltage across it.
<><><> For more information see the Related link shown below.
How many 1000 watt 120 volt 8.3 amp lights can you plug into a standard household outlet?
Household circuits come in two flavors, 15 amp and 20 amp. Check the circuit breaker or fuse in your panel to see which one your outlet is wired to. If the outlet is on a 15 amp circuit, you could only run one, but if you have a 20 amp circuit, you could get away with two, assuming there are no other appliances plugged into the same circuit. The electrical code says circuits should be loaded to no more than 80% of the breaker's rating. for a 20 amp breaker, that works out to 16 amps. Your two lamps would draw 16.6 amps, so you would be right at the limit.
This seems like a question from an electrical course, and is probably best answered by your course materials. It's your test question, not ours, and there won't always be someone else to ask for the answer. Earn your diploma.
How do you recharge a lithum battery?
Oooh, be careful! Lithium batteries should not be recharged. They can explode if you try! Lithium-ion (Li-ion) batteries can be recharged, but a special charging circuit that monitors current and voltage profiles as well as temperature is required. This usually means a definite-purpose charger built for your specific battery be used.
As both batteries have exactly the same output voltage 9.6 Volts, there will be no effect to the device.
The bigger battery just lasts for a longer period of time before it has to be re-charged.
You can get an approximate idea of how much longer by doing some simple calculations:
If the device takes a current of 100 mA,
* it would run for 700 /100 = 7 hours on the 700 mAh battery
* it would run 2500/100 = 25 hours on the 2500 mAh battery.
What is the Principle of working of lifts?
A lift, or an elevator, is run by the suspension of a boxed shaped enclosure on cables. To make the elevator go up, the cables are pulled from below through the use of a pulley system. The same is for going down except there are a series of brakes applied to make sure the cable does not fall.
What is the test button for on a GFCI or an RCD?
The "TEST" button is there for you to check the Ground Fault Circuit Interrupter (GFCI) or Residual Current Device (RCD) is operating correctly. When you test the device using its Test button it should trip to break the circuit. Then anything connected to that circuit will have no power. If the device is tripped - such as when you press the Test button - no outlet in that circuit will be able to work until you reset the device using its "RESET" button. If the GFCI or RCD just keeps on tripping off every time you reset it, then you have a circuit or appliance fault somewhere. The fault will have to be fixed before the device can be reset. For more information click on the Related Questions shown below. <><><>
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.
What is the unit for measuring electrical power?
Electrical power is measured in watts.
Answer
Power is measured in watts. There is no such thing as 'electrical power' as power is simply a rate.
volt
The basic unit of electrical power is the watt. If the power is very large, then kilowatts (thousands of watts) or megawatts (millions of watts) are also used.
Power is simply a rate, so you cannot really have 'electrical' power, 'mechanical' power, etc. In the SI system of measurements, power is measured in watts (W).
Electric power is usually measured in watts, kilowatts, or sometimes megawatts. One watt is equal to one volt-ampere or one joule per second.
Electric power is the rate at which an electrical circuit transfers electric energy. The SI unit of power is the watt which is one joule per second.
Wattage, Watts, and (W) are what power is measured in there just different ways to say watts.
"Watts" is the term used to define a quantity of power. If you were looking for a device used to measure power, that is called a wattmeter.
Technically, power is a measure of how fast energy is consumed, so energy can be measured as power multiplied by time.
Answer
There is no such thing as 'electrical' power, as power is simply a 'rate'. Power is a measure of the rate of doing work, transferring energy, or of heat transfer. As energy, work, and heat are all measured in joules, power is measured in joules per second which, in SI, is given a special name: the watt.
Another example of a 'rate' is velocity. We do not describe different times of velocity; neither should we describe different types of power.
Electrical power in SI is measured in watts, or joules per second. It is equal to current times voltage, which is also equal to current squared times resistance. (P=IV and V=IR, where P is power, I is current, V is voltage, and R is resistance.)
The watt is a derived unit of power in the International System of Units (SI), named after the Scottish engineer James Watt. The unit, defined as one joule per second, measures the rate of energy conversion.
How do you light the pilot light of a Pentair MiniMax 100MV gas pool heater?
Pentair Mini Max does not have a pilot light, it has a Electronic ignition.
If your having trouble getting it to fire up you could have a problem with a plugged burner, bad ignition or a bad valve.
What is often used in a switch as an insulator?
A dielectric material is often used as an insulator in a switch. It prevents unwanted electrical contact between components and helps to maintain the separation of electrical contacts for proper switch operation.
A wetting voltage is a minimum electric current needed to break through the surface film of a contact. This film occurs most in areas of high humidity, and as such wetting current is needed for systems with delicate switches.
Due to the problems in the ballast.
Replace the ballast.
== == It depends on the local wiring codes or regulations where the outlet box is - or is to be - installed.
Usually an outlet box fitted in a room or other area where there is a supply of piped water or which is subject to damp or humid conditions - such as a kitchen, bathroom, shower room, sauna, on an outside wall in the garden, etc. - needs to have a secure Ground wire fitted in addition to the Neutral wire. In some localities any such outlet must be protected by a GFCI or RCD too.
It is best to check with the electrical wiring safety authority in your town or locality if you are not familiar with these matters. It is not wise to attempt to do this work if you have not been trained how to install electrical fixtures and fittings safely.
Please see the answers to the Related Questions listed below. <><><> 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.
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. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
EHV - EXTRA HIGH VOLTAGE - STARTING 500 KILOVOLTS IN UP (500,000 VOLTS)
RAM Module Failure, try removing the ram and putting it back into the computer to see if the problem corrects itself. If problem continues, try using memory that is known to be working.
Why do pencils have six sides?
Pencils have six sides because for the companies making them it's alot cheaper. You can make more six sided pencils from the same amount of wood than round pencils. For every 8 round pencils there would be 9 six sided pencils. Also they don't roll off of desks as easily. ------------------------------------------------------------------------------------------------ Also like honeycomb, hexagonal tubes stack very well in a box with no space left between them.
Is it OK to splice tv coaxial cable?
The tools to do what I described are somewhat expensive, and require you to know how to strip and prepare cable as well as crimp connectors properly. Avoid the compression style - even though they are superior, the tools to use them will cost you more than just calling a cable guy to come out and fix the problem.
Without using the proper tools you would expose the copper wire on both sides and twist them together.
Why does resistance increase in a series circuit?
In a series circuit, the total resistance increases because the individual resistances add up. As the current flows through each component in succession, the resistance offered by each component adds to the total resistance. This leads to an overall increase in resistance in a series circuit.
What does the word GPE stand for?
Original Answer (Physics): Gravitational Potential Energy -------------------- Electrical Answer: If this is electrically related, perhaps you mean GFPE which means Ground Fault Protection for Equipment.
If your load is 20a at 230v do you need a 20a breaker?
If your load takes 20 Amps then: * a breaker with a smaller rating - say 15 Amps - would always switch off the current because it is too high for the breaker to carry
* a breaker with a 20 Amp rating could be safe to use with this load, but it is so close to its rated limit it may keep tripping to switch off the current.
If that happens it may be better to use a breaker with a slightly higher rating - say 25 or 30 Amps - but do not decide to change it yourself unless you are an experienced electrical technician.
* A breaker with a higher rating - say 40 Amps - may not switch off the current if a fault develops in the 20 Amp load so it could be unsafe to use.
The likely overall current - and the kinds of loads (whether they are include any motors or if they are only heating and lighting) - from all appliances that are likely to be plugged into the circuit which the breaker has been installed to protect must be properly considered and any Fire or other safety hazards must always be assessed. ALWAYS CHECK WITH YOUR LOCAL WIRING SAFETY OFFICE BEFORE YOU ATTEMPT TO CHANGE ANYTHING - BREAKERS, CABLES OR OUTLETS -
ON A POWER MAINS CIRCUIT
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.
What inhibits the flow of electricity?
A resistor inhibits the flow of electricity by varying degrees, depending on value.
Total inhibition is provided by an insulator.
Resistance or Impediance (magnetic fields), or a combination of both impede electrical flow.
