Sorting site plugs by color
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Classification of site plugs by color
Site plugs are devices used to connect to mains rated at higher voltages and currents than in the home. They are commonly used in multiphase systems, with high currents, or when protecting from environmental hazards. Industrial plugs can often have a waterproof cover, a waterproof jacket, or can work together with a fuse to prevent unexpected disconnections. Some connection types are approved for hazardous areas such as coal mines or petrochemical plants where flammable gases are present.
Almost all three-phase power plugs in the industry will have 3 or more pins, with ground (ground) pins depending on the electrical equipment. But it may not be because three-phase loads such as motors don’t need it. Such a plug will have four prongs. Wide range of 5-pin plugs for special use cases.
Classify power plugs by color
We can easily distinguish products by color to know their scope of use. The colors of an IEC 60309 plug or socket give its rated voltage and frequency. The most common colors are yellow (125 V), blue (250 V), and red (400 V). Black versions (500 V) can often be found onboard.
As an example of the symbol on a power plug, common colors are 100-130 volts and 50-60 Hz yellow, blue for 200-250 volts and 50-60s Hz, and red for 400-480 volts and 50-60 Hz. Color code depends on peak, phase-to-phase, voltage. In addition to color coding voltage and frequency are coded by keyway positions. The blue fittings are often used to provide weather-resistant external sockets for outdoor movements. Yellow fittings are used to supply 110 V supply isolation transformers to UK construction sites to reduce the risk of electric shock and this use spills into the use of external power tools. outside of the build environment.
Classification of industrial plugs
Distributing genuine industrial plug equipment
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