Each lead had a different color since relative polarity or phase was more important for these transformers. Modern personal computer peripheral cables and connectors are color-coded to simplify connection of speakers, microphones, mice, keyboards and other peripherals, usually according to the PC99 scheme.
Red-jacketed cable is also used for relatively low-voltage fire alarm wiring, but has a much different appearance. Building wiring under the US National Electrical Code and the Canadian Electrical Code is identified by colors to show energized and neutral conductors, grounding conductors and to identify phases.
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Mains electrical wiring, both in a building and on equipment was once usually red for live, black for neutral, and green for earth, but this was changed as it was a hazard for color-blind people, who might confuse red and green; different countries use different conventions.
Red and black are frequently used for positive and negative of battery or other single-voltage DC wiring.
Intermediate-frequency tuned transformers were coded blue and red for the primary and green and black for the secondary. The insulation of the wire may be solidly colored, or where more combinations are needed, one or two tracer stripes may be added.
Thermocouple wires and extension cables are identified by color code for the type of thermocouple; interchanging thermocouples with unsuitable extension wires destroys the accuracy of the measurement.
Other color codes are used in the UK and other areas to identify building wiring or flexible cable wiring. E-series of preferred numbers — IECwhich defines series of preferred resistance values. Two wires of each color were provided for each circuit, and phasing was not identified by the color code.
Local area network cables may also have non-standardised jacket colors identifying, for example, process control network vs. Some wiring color codes are set by national regulations, but often a color code is specific to a manufacturer or industry.
The same resistance is encoded by: A common convention for wiring systems in industrial buildings is: There is an important difference between the use of three and of four bands to indicate resistance.Feb 22, · This physics video tutorial explains how to use the resistor color code chart to determine the value of the resistance of a resistor in an electric circuit.
Learn about resistor color code calculator along with chart and methods, resistance calculator, resistor color code and identify the value of band wire.
Toggle navigation. CLASSES. CLASSES ; Starting from your left note all the colors of the bands and write them down in sequence. Next, use the table given below to see which digits they.
RESISTOR COLOR CODE SYSTEM Resistor color coding system applies to carbon film resistors, metal oxide film resistors, fusible resistors, This system was employed for resistors when the surface area was not sufficient to print the resistance value for the past time.
color, here it is red so write down a 2 next to the two.
(you should. An electronic color code is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, There is an important difference between the use of three and of four bands to indicate resistance.
The same resistance is encoded by: Red. The Resistor Color Code Calculator decodes and identifies a value and tolerance of 4 band wire wound resistors.
More online conversion calculators at Digi-Key. Our Resistor Color Code Calculator is a handy tool for reading carbon-composition resistors whether it's a 4-band, 5-band or 6-band type. To use this tool, simply click on a particular color and number and watch how the actual bands on the resistor illustration change.Download