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| How can an aftermarket power cord, which represents the last 6 feet or so of many miles of cheap in-wall and underground wiring, make any difference at all to sound or video?There are many misconceptions about the basics of power transmission and power quality that make it difficult for people to understand why any aftermarket power cord can impact the performance of a home A/V or professional recording and film system. The fact of the matter is that Shunyata Research power cords have made dramatic differences in all manner of consumer and professional recording, sound and film systems. Many skeptics question even the possibility of an aftermarket power cord making a difference in electronics performance. Shunyata Research is pleased to provide answers. The first and most obvious question is -- can power cords make any difference at all? There is no sense in talking about theories of operation if we ca't agree that there can be an obvious visual and audible effect when applying a competently designed aftermarket power cord to electronics. Most of the thousands of professionals and consumers that use Shunyata Research power cords started out as skeptics and have answered that question for themselves through their own experience. The only cases where a high quality power cord may not have a significant effect is when it is coupled with a poor quality power conditioner that creates a high impedance to instantaneous current flow problem. The most common misconceptions about power transmission and their simple technical truths follow: MISCONCEPTION #1: AC power is like water coming from a large power tank, flowing through several 10s of feet of power hose into a component. This implies that the component is at the end of this system. Answer: Actually, the component sits between two power conductors: the hot and the neutral. AC power oscillates (alternates) back and forth at a 50-60hz rate. So power does not pour into the component at all. The component's power supply is within a complex network of wires and connectors. Due to their obvious proximity, ALL of the wire and connectors can and do affect the performance of the component's power supply. MISCONCEPTION #2: AC power can be contaminated just like water in a hose. This implies that once the water is contaminated at some point up stream, that is must be cleansed before it arrives at the audio component. Answer: As stated in #1, the component is not a the end of the power hose. It is between two power hoses and the current is oscillating back and forth. Further, current is not like water at all. Electrons cannot be contaminated. There are two aspects to power transmission: the EM wave and the current flow. The current itself cannot be contaminated but the EM wave can be modulated with other frequencies. We usually call these other frequencies noise or EMI. Within the various parts of a power circuit there may be EMI in certain parts that are not present in others. EM energy can be transformed or redirected to lessen their effects. Some power cords for example, use capacitors, inductors, or ferrites in an attempt to control the EM fields around the audio component. The success of such an approach is completely dependent upon the specific power supply design and its reaction to the added reactive capacitance of the power cord. MISCONCEPTION #3: There is up to a hundred feet of wire in the walls, so the last 6 feet of power cord can't possibly make any difference. Answer: The PC is NOT the last 6 feet as stated in #1 and the local current and EM effects directly affect the sonic performance of the component. The power cord is not the last 6 feet, it is the first 6 feet from the perspective of the component. The further a noise source is from a component, the less of an impact it will have on the components power supply. The high-frequency noise sources that have the greatest impact on audio and video performance are the system components themselves -- which are usually all in close proximity of one another and all emit radiated fields of high-frequency noise. A well designed power cord can act as a noise-isolated extension of the primary winding of a component's power supply and will help isolate the power supply from the fields of radiated RF and EM noise energy that is ever present in all electronics systems. MISCONCEPTION #4: There is a tremendous amount of electrical interference and EMI coming from outside the home that we need to protect our equipment from. This implies that we need some sort of power conditioner or filter to protect the equipment. Answer: Most of the EMI that affects the audio quality of a system is generated by the audio components themselves. EM waves that travel through space dissipate in power as the square of the distance from the source and very high frequencies that propagate through the power circuit do not survive for long. Power lines present a high impedance to Mhz and Ghz signals due to the relatively high inductance of power lines. A primary source of audible sonic degradation is caused by the power supplies. Most components use FWBR (full wave bridge rectifier) power supplies that generate an incredible amount of transient noise when the rectifiers switch on and off. The design of a power cord can significantly affect the reactance of these signals within the power supply. Because the power cord is part of the primary winding of the power transformer, the transition between the various metals used in a PC can cause EM reflections and diode-like rectification of the noise impulses as they propagate away from the power supply. If the PC presents a high impedance to these signals they will be reflected back into the power supply where they will intermodulate increasing the high frequency noise levels of the component. Most power supply filters are ineffective at blocking very high frequency noise components and much of it is passed through to the DC rails. The sonic effects of this include: high background noise levels, blurred or slurred transients and a general lack of clarity and purity of the sound or visual image. MISCONCEPTION #5: There is some conspiracy among audio designers that keeps them from producing a "proper" power supply that is not affected by the quality and design of a power cord. This concept is like saying that if a speaker were properly designed, you wouldn't need to use a good quality speaker cable. Answer: Shunyata Research power cords have been tested with modest beginner and mid-fi equipment as well as the most exotic and sensitive recording devices and electronics. We have yet to find a component that cannot be improved by replacing the power cord with a high-quality design. As long as power supply design is based upon FWBRs or switching supplies, the power cord will always be significant. MISCONCEPTION #6: High-end power cords just increase the circuit capacitance acting as a high-frequency shunt. There are some power cords that ARE designed this way. Some even insert capacitors within the cable to further increase capacitance. This approach has some positives and many negatives, including the reactive interference with the way many power supplies are designed. Answer: Capacitance alone cannot account for the differences in a power cord's performance. There are some very effective aftermarket power cords that have virtually unmeasurable levels of capacitance. These power cables are usually designed around hollow tubes with the conductors inside. The conductors are several inches apart and cannot significantly affect the capacitance of the power circuit. MISCONCEPTION #7: Power cords are just like speaker cables; the shorter the cable the better. Answer: A speaker cable conducts an audio signal from the power amplifier to the speaker. The distance is quite small, on the order of a couple of feet to several feet. The quality of a speaker cable is determined by how well it can transmit the signal from the amplifier to the speaker without alteration or signal degradation. A power cable on the other hand is not transmitting an analog signal. It is conducting A.C. power and its sonic superiority will be determined by its ability to deliver current (steady-state and instantaneous) and its ability to deal with the EMI effects of the components to which it is attached. Since a power cord is composed of a hot and neutral wire that the component sits between, a change in the length of the cord will increase the size of the "buffer" around the component. In the specific case of Shunyata Research -- we use patented noise-isolating geometries, shielding and a patented compound that absorbs EMI in some power cord models. Increasing the length of the cable, increases the noise isolation, or coupling effect to the ZrCa-2000 compounds, therefore increasing the performance of the cable. In general, Shunyata Research does not recommend a power cord that is shorter than 3 feet or 1 meter in length for performance ease of use and, or resale reasons. Of course, subtle degrees of audio performance are not the only consideration when putting together an audio system. Aesthetics are also important especially when the system is located in a beautiful home. I just point out the performance differences so that people can make an informed decision when determining the optimum length for their cables. | for your philippine electrical concerns...needs...installation...orders...safeelectrical2013@gmail.com | METRO MANILA PHILIPPINES | WIRE AND CABLE SUPPLIER IN METRO MANILA | WIRE AND CABLE SUPPLIER IN QUEZON CITY | WIRE AND CABLE SUPPLIER IN LUZON | WIRE AND CABLE SUPPLIER IN VISAYA | WIRE AND CABLE SUPPLIER IN SUBIC | WIRE AND CABLE SUPPLIER IN CLARK | WIRE AND CABLE SUPPLIER IN THE PHILIPPINES | WIRE AND CABLE SUPPLIER IN THE PHILIPPINES | ELECTRICAL SUPPLIER IN METRO MANILA | ELECTRICAL SUPPLIER IN QUEZON CITY | ELECTRICAL SUPPLIER IN LUZON | ELECTRICAL SUPPLIER IN VISAYA | ELECTRICAL SUPPLIER IN SUBIC | ELECTRICAL SUPPLIER IN CLARK | ELECTRICAL SUPPLIER IN PHILIPPINE INDUSTRIAL PARK | ELECTRICAL SUPPLIER IN PHILIPPINE ECONOMIC ZONE | ELECTRICAL SUPPLIER FOR PHILIPPINE FOREIGNERS | ELECTRICAL SUPPLIER FOR PHILIPPINE PROVINCES | FOR YOUR PHILIPPINE ELECTRICAL CONCERNS...NEEDS...INSTALLATION...QUOTATION...ORDERS | KINDLY EMAIL US: SAFEELECTRICAL2013@GMAIL.COM | SAFEELECTRICALONLINE@GMAIL.COM | FOR YOUR PHILIPPINE ELECTRICAL CONCERNS...NEEDS...INSTALLATION...QUOTATION...ORDERS: | KINDLY EMAIL US: SAFEELECTRICAL2013@GMAIL.COM | SAFEELECTRICALONLINE@GMAIL.COM | FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION | CONTACT US: | FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION | CONTACT US: | FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION | CONTACT US: | MOBILE NUMBERS: SMART: +63 09079522099 | +63 09214026477 | GLOBE: +63 09273919600 | +63 09157920129 | SUN: +63 9227192434 | +63 09336253505 | WIRELESS LANDLINE: +63 4068727 | +63 4922566 | LANDLINE: +63 4317553 | HURRY..CALL US...NOW!!!! | THANK YOU FOR YOUR ORDERS AND INQUIRIES... | LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE PHILIPPINES | ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE PHILIPPINES | LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN METRO MANILA | ELECTRICAL FENCE SUPPLIER AND INSTALLER IN METRO MANILA | LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE PHILIPPINE ECONOMIC ZONE | ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE PHILIPPINE ECONOMIC ZONE | LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE VISAYA REGION | ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE VISAYAS REGION | LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE MINDANAO | ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE MINDANAO | FOR YOUR LIGHTNING STRIKE PROTECTION...LET US HELP YOU AVOID SUCH ACCIDENTS... | BEFORE IT IS TOO LATE...BEFORE IT IS TOO LATE... | WHEN LIGHTNING STRIKE HIT YOU.. | I GUARANTEE YOU..YOU'LL NEVER LIVE TO TELL YOUR EXPERIENCE... | DON'T BE THE NEXT VICTIM...PROTECT YOURSELF..YOUR FAMILY..YOUR BUSINESS AT ALL TIMES.. | INSTALL A LIGHTNING ARRESTER IN YOUR PLACE...DO IT NOW BEFORE YOUR CAUGHT UNAWARE... | IF YOU HAVE LIGHTING PROTECTION INSTALLED... | YOU'LL HAVE PEACE OF MIND...YOU CAN SLEEP WELL EVEN WHEN LIGHTNING STRIKES... | YOU KNOW YOUR WELL PROTECTED... | IN YOUR HOME, IN YOUR PLACE OF BUSINESS AND IN YOUR PROPERTIES... | HURRY..CALL US...NOW!!!! | THANK YOU FOR YOUR ADVANCE ORDERS AND INQUIRIES... | "PHILIPPINE FOREIGNERS AND PHILIPPINE PROVINCES ELECTRICAL SUPPLIER | AND SERVICE PROVIDER" | "SAFE ELECTRICAL SUPPLY AND SERVICES" | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
WE'LL HELP YOU OWN YOUR ELECTRICAL SUPPLIES..HELP YOU ON YOUR ELECTRICAL PROJECT AND CONCERNS......... ATTENTION!!! ALL ELECTRICAL MANUFACTURER PRODUCTMANUFACTURER AROUND THE WORLD..YOU CAN PARTNER WITH US AND WE'LL OFFER YOUR ELECTRICAL CABLES/PRODUCTS HERE IN THE PHILIPPINES......YOU CAN EMAIL US SAFEELECTRICAL2000@GMAIL.COM ELECTRICALSAFETY2019@GMAIL.COM OR thru VIBER: 09227192434 MESSENGER: m.me/jigzsafeelectrical THANK YOU MOBILE#09227192434..09454459221 landline: 63 02 79712332
Showing posts with label POWER CORD. Show all posts
Showing posts with label POWER CORD. Show all posts
Sunday, September 8, 2013
POWER CORDS: FREQUENTLY ASKED QUESTIONS...for your philippine electrical concerns...needs...installation...orders...safeelectrical2013@gmail.com
What is the difference between a cord and a cable?...for your philippine electrical concerns...needs...installation...orders...safeelectrical2013@gmail.com
What is the difference between a cord and a cable?
There are two main differences between a cord and a cable.
A cord includes conductor sizes up to and including 4mm2 and up to five cores, and is generally rated at 240/440 volts (although some heavy duty flexible cords are rated at 0.6/1kV).
A cable includes conductor sizes of 6mm2 and above and is generally rated at 0.6/1kV. Cables with flexible conductors less than 6mm2 and with a core count greater than five core are also classified as flexible cables.
for your philippine electrical concerns...needs...installation...orders...safeelectrical2013@gmail.com
METRO MANILA PHILIPPINES
WIRE AND CABLE SUPPLIER IN METRO MANILA
WIRE AND CABLE SUPPLIER IN QUEZON CITY
WIRE AND CABLE SUPPLIER IN LUZON
WIRE AND CABLE SUPPLIER IN VISAYA
WIRE AND CABLE SUPPLIER IN SUBIC
WIRE AND CABLE SUPPLIER IN CLARK
WIRE AND CABLE SUPPLIER IN THE PHILIPPINES
WIRE AND CABLE SUPPLIER IN THE PHILIPPINES
ELECTRICAL SUPPLIER IN METRO MANILA
ELECTRICAL SUPPLIER IN QUEZON CITY
ELECTRICAL SUPPLIER IN LUZON
ELECTRICAL SUPPLIER IN VISAYA
ELECTRICAL SUPPLIER IN SUBIC
ELECTRICAL SUPPLIER IN CLARK
ELECTRICAL SUPPLIER IN PHILIPPINE INDUSTRIAL PARK
ELECTRICAL SUPPLIER IN PHILIPPINE ECONOMIC ZONE
ELECTRICAL SUPPLIER FOR PHILIPPINE FOREIGNERS
ELECTRICAL SUPPLIER FOR PHILIPPINE PROVINCES
FOR YOUR PHILIPPINE ELECTRICAL CONCERNS...NEEDS...INSTALLATION...QUOTATION...ORDERS
KINDLY EMAIL US: SAFEELECTRICAL2013@GMAIL.COM
SAFEELECTRICALONLINE@GMAIL.COM
FOR YOUR PHILIPPINE ELECTRICAL CONCERNS...NEEDS...INSTALLATION...QUOTATION...ORDERS:
KINDLY EMAIL US: SAFEELECTRICAL2013@GMAIL.COM
SAFEELECTRICALONLINE@GMAIL.COM
FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION
CONTACT US:
FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION
CONTACT US:
FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION
CONTACT US:
MOBILE NUMBERS: SMART: +63 09079522099
+63 09214026477
GLOBE: +63 09273919600
+63 09157920129
SUN: +63 9227192434
+63 09336253505
WIRELESS LANDLINE: +63 4068727
+63 4922566
LANDLINE: +63 4317553
HURRY..CALL US...NOW!!!!
THANK YOU FOR YOUR ORDERS AND INQUIRIES...
LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE PHILIPPINES
ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE PHILIPPINES
LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN METRO MANILA
ELECTRICAL FENCE SUPPLIER AND INSTALLER IN METRO MANILA
LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE PHILIPPINE ECONOMIC ZONE
ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE PHILIPPINE ECONOMIC ZONE
LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE VISAYA REGION
ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE VISAYAS REGION
LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE MINDANAO
ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE MINDANAO
FOR YOUR LIGHTNING STRIKE PROTECTION...LET US HELP YOU AVOID SUCH ACCIDENTS...
BEFORE IT IS TOO LATE...BEFORE IT IS TOO LATE...
WHEN LIGHTNING STRIKE HIT YOU..
I GUARANTEE YOU..YOU'LL NEVER LIVE TO TELL YOUR EXPERIENCE...
DON'T BE THE NEXT VICTIM...PROTECT YOURSELF..YOUR FAMILY..YOUR BUSINESS AT ALL TIMES..
INSTALL A LIGHTNING ARRESTER IN YOUR PLACE...DO IT NOW BEFORE YOUR CAUGHT UNAWARE...
IF YOU HAVE LIGHTING PROTECTION INSTALLED...
YOU'LL HAVE PEACE OF MIND...YOU CAN SLEEP WELL EVEN WHEN LIGHTNING STRIKES...
YOU KNOW YOUR WELL PROTECTED...
IN YOUR HOME, IN YOUR PLACE OF BUSINESS AND IN YOUR PROPERTIES...
HURRY..CALL US...NOW!!!!
THANK YOU FOR YOUR ADVANCE ORDERS AND INQUIRIES...
"PHILIPPINE FOREIGNERS AND PHILIPPINE PROVINCES ELECTRICAL SUPPLIER
AND SERVICE PROVIDER"
"SAFE ELECTRICAL SUPPLY AND SERVICES"
Friday, September 6, 2013
Power cord..what you will learn..for your philippine electrical concerns...needs...installation...orders...safeelectrical2013@gmail.com
Power cord
Not to be confused with Power chord.
 | This article needs additional citations for verification. (September 2010) |
A power cord, line cord, or mains cable is a cable that temporarily connects an appliance to the mains electricity supply via a wall socket orextension cord. The terms are generally used for cables using a power plugto connect to a single-phase alternating current power source at the local line voltage—(generally 100 to 240 volts, depending on the location). The terms power cable, mains lead, flex or kettle lead are also used. A lamp cord (also known as a zip cord) is a light-weight, ungrounded, single-insulated two wire cord used for small loads such as a table or floor lamp.
A cord set includes connectors molded to the cord at each end. Cord sets are detachable from both the power supply and the electrical equipment, and consist of a flexible cord with electrical connectors at either end, one male, and one female. One end of the cord set is attached to a molded electrical plug; the other is typically a molded electrical receptacle to prevent the possibility of having an exposed live prong or pin which would cause electric shock. The female connector attaches to the piece of equipment or appliance while the male plug connects to the electrical receptacle or outlet.
Contents
[hide]Features
Power cables may be either fixed or detachable from the appliance. In the case of detachable leads, the appliance end of the power cord has a female connector to link it to the appliance, to avoid the dangers from having a live protruding pin. Cords may also have twist-locking features, or other attachments to prevent accidental disconnection at one or both ends. A cord set may include accessories such as fuses for overcurrent protection, a pilot lamp to indicate voltage is present, or a leakage current detector. Power cords for sensitive instruments, or audio/video equipment may also include a shield over the power conductors to minimizeelectromagnetic interference.
A power cord may have a retaining clamp, a mechanical device that prevents an appliance coupler from inadvertently being pulled or shaken loose. Typical application areas with stricter safety requirements includemedical technology, stage and lighting technology, and computing equipment. For specialty equipment such as construction machinery, sound and lighting equipment, emergency medical defibrillators and electrical power tools, used in locations without a convenient power source, extension cords are used to carry the electrical current up to hundreds of feet away from an outlet.
In North America, the National Electrical Manufacturers Association develops standards for electrical plugs and receptacles and cables.[1]
International power cords and plug adapters are used in conjunction with electrical appliances in countries different from those in which they were designed to operate. Besides a cord with one end compatible to receptacles or a device from one country and the other end compatible with receptacles or devices from another country, a voltage converter is usually necessary, as well, to protect travelers' electronic devices, such as laptops, from the differing voltages between the United States and places like Europe or Africa.
North American lamp cords have two single-insulated conductors designed for low-current applications. The insulator covering one of the conductors is ribbed (parallel to wire) for the entire length of the cord, while the other conductor's insulator is smooth. The smooth one is hot and the ribbed one is neutral.[2]
Connectors
IEC 60320 power cables come in normal and high-temperature variants, as well as various rated currents. The connectors have slightly different shapes to ensure that it is not possible to substitute a cable with a lower temperature or current rating, but that it is possible to use an overrated cable. Cords also have different types of exterior jackets available to accommodate environmental variables such as moisture, temperature, oils, sunlight, flexibility, and heavy wear. For example, a heating appliance may come with a cord designed to withstand accidental contact with heated surfaces.
Worldwide, more than a dozen different types of connectors are used for fixed building wiring. Products sold in many different markets can use a standardized IEC 60320 connector and then use a detachable power cord to match the local electrical outlets. This simplifies safety approvals, factory testing, and production since the power cord is a low-cost item available as a commodity. Note that the same types of appliance-side connectors are used with both 110 V and 230 V power cables, so care must be used when moving appliances between countries with different voltage standards — substituting a power cord that matches local power outlets will result in an incorrect voltage being applied to the appliance or equipment. Unless explicitly labelled as capable of handling local voltages, this is very likely to damage or destroy the appliance. Some devices have a slide-switch to adapt to different voltages, or wide-ranging power supplies.
Power supplies
Cord sets must be distinguished from plug-in wall mounted power supplies, where the connector also contains atransformer, and possibly rectifiers, filters and regulators. Unwary substitution of a standard mains-voltage connector for the power supply would result in application of full line voltage to the connected device, resulting in its destruction and possible fire or personal injury.
Sunday, September 1, 2013
EXTENSION CORD...WHAT YOU SHOULD KNOW...for philippine electrical inquiries and orders: email us: SAFEELECTRICAL2013@GMAIL.COM
Extension Cord Safety Fact Sheet
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| Department: Workplace | ||
|---|---|---|
| Type: Fact Sheets | ||
An extension cord is an insulated, flexible electric wire fitted with a plug at one end and one or more outlets on the other. It provides a convenient, way to use electrical equipment that can’t reach a wall outlet.
Safety Tips
These important safety principles can help keep your office safe from electrical hazards:
Facts and Statistics
Extension cords are a leading cause of electrical fires, and can cause injury and death if used improperly. According to the CPSC:
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