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Which dc electrical polarity DCEN or DCEP requires a larger electrode diameter and why?
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If you don't ground equipment that requires it what will happen?
It depends on the equipment. The problems can be anything from a risk of electrical shock to semiconductor failure.
Are electromagnets used in generatorsto transform mechanical energy into electrical energy?
This requires magnets in general. It need not be an electromagnet; sometimes electromagnets are used, sometimes permanent magnets.
Can you zip tie MI cable to conduit legally?
No, the electrical code requires that the mineral insulated cable be strapped at proper intervals and not be piggy backed on to other conduit structures.
Difference between 7018 and 6013 electrodes?
6013 is normal arc electrode which is used for light jobs like sheet welding or tank making but when it comes to heavy construction jobs where strength required is more 7018(Low Hydrogen) Arc Electrode is used like boilers, heavy structures etc. Working with 6013 is far easier than 7018, which requires welder's skills. Neatness in finishing is also more with 6013 than 7018. any further info. on construction : nangalsuri@rediffmail.com Surinder Singh
What size ground wire for cold water pipe for 325 amp service?
DON'T CONNECT A GROUND WIRE TO A COLD WATER PIPE!!! Use ground rods in accordance with local codes. When in doubt, contact a local electrician or the local building and zoning office of your city or county. Connecting a ground wire to your cold water pipe can result in electrolysis that will eat away at you water pipe. ---------------- Metal underground water pipe is the first grounding electrode listed in the NEC. It is still commonly used in residential installations and is used in commercial installations when available. When the water pipe is used as the primary grounding electrode, it must be supplemented with another electrode which is most commonly a ground rod. Generally speaking, a 325 amp service requires 350 kcmil copper conductors for residences or 400 kcmil copper conductors for commercial installations. In either case these require a grounding electrode conductor of 1/0 ("one ought") copper.
What is reverse polarity in welding?
This is applicable to DC supply Arc Welding.In Layman language, when the electrode is given positive potential and the work piece is given negative potential, the weld formed is shallow and wide, this method is called 'Direct Current Reverse Polarity' (DCRP) welding procedure.When the machine is set on straight polarity, the electrons flow from the electrode to the plate, concentrating most of the heat on the work. With reverse polarity, the flow of electrons is from the plate to the electrode, thus causing a greater concentration of heat at the electrode. Because of this intense heat, the electrode tends to melt off; therefore, direct current reverse polarity (DCRP) requires a larger diameter electrode than direct current straight polarity (DCSP). Notice that DCSP produces a narrow, deep weld. Since the heat is concentrated on the work, the welding process is more rapid and there is less distortion of the base metal. Overall, straight polarity is preferred over reverse polarity because you can achieve better welds. DCRP forms a wide and shallow weld and is rarely used in the GTAW process. The exception to this is when it is used to weld sections of aluminum or magnesium.DCRP has excellent cleaning power that results from the action of positive charged gas ions. When these gas ions strike the metal, they pierce the oxide film and form a path for the welding current to follow. This same cleaning action occurs in the reverse polarity half of an alternating current welding cycle.
Why is Nitrogen non reactive?
the nitrogen cycle requires - polarity...
Which electrical test requires the supply to be energized?
Testing of an electrical circuit for voltage requires the supply to be energized.
Why cannot store the ac power in battery?
Because batteries have fixed polarity, whereas AC requires that the polarity is switched, normally 50-60 times per second.
How does water's polarity allow for it to also have the property of high specific heat?
Polarity makes molecules attract one another more strongly; this requires more energy to break them apart.
Why Carbon dioxide is used in MiG welding?
MIG (Metal Inert Gas) and MAG (Metal Active Gas) welding requires an external shielding, since the electrode does not have a coating of its own.Higher carbon dioxide content increases the weld heat and energy when all other weld parameters (volts, current, electrode type and diameter) are held the same. Higher levels of CO2 allow deeper penetration of the weld as well.
The electrode holder used for shielded metal-arc welding may not be used carbon arc welding?
Any electrode holder that will accommodate the size of rod can be used. Twin Carbon Arc Welding requires a specific holder. Air Carbon Arc Gouging requires a special holder that also supplies a stream of air.
What does conduction require?
If you mean electrical conduction, that requires electrical charges that are fairly free to move around.
Is there a country that is 50 square miles in diameter?
Square miles is a measurement of area. Diameter requires a distance measurement, not an area measurement.
Who requires more a circular diameter of 6 or a square with sides of 4.25?
The circle.
Circle to square feet?
The answer requires information on the size of the circle: its radius, diameter or circumference.
Is a computer have a generator?
A computer does not have a generator, it requires standard AC electrical current which is available in any electrical outlet throughout your home.
