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Engineering drawing abbreviations and symbols are used to communicate and detail the characteristics of an engineering drawing. This list includes abbreviations common to the vocabulary of people who work with engineering drawings in the manufacture and inspection of parts and assemblies.
Engineering UO abbreviation meaning defined here. What does UO stand for in Engineering? Get the most popular UO abbreviation related to Engineering.
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- Voltage Rating
- Maximum Rated Voltage and Nominal Voltage
- Earthed and Unearthed Systems
- Which Cable Type – Lv, Mv, HV, EHV, UHV?
- Conductor Temperature Rating
One of the most fundamental ratings assigned to an electric cable is that of voltage rating. The rated voltage of a cable is the reference voltage for which the cable is designed and which serves to define the electrical tests. The rated voltage of a cable is normally expressed by the combination of two values, Uo/U, expressed in volts: Uois the Ro...
With the exception of 600/1000V cables, all of the Notes use the same wording. A cable can be used at 10 % higher voltage than its rated voltage if the latter is at least equal to the system’s nominal voltage. What this means is that it is perfectly acceptable to use a cable with a RATED voltage of, say, 6/10 kV on a system where the NOMINAL system...
All the voltages given above are for cables operating on an “earthed” system Uo/U. However, some systems are “unearthed”, that is to say, U/U the voltage between the conductor and “earth” is the same as the voltage between phase conductors, for example – 10/10 kV. In these cases, the cable chosen should have a Uorating of at least 10 kV, so a 10/15...
People often refer to LV cables, MV cables, HV cables, EHV cables and UHV cables but there is no standardised National or International definition of what each term means; this can lead to misunderstanding, so care is needed when using these terms, especially in international markets. As a general guide, not a definite rule,the following can be use...
All Thermoplastic and Thermoset materials used to make cables will slowly age and deteriorate over time; the rate of deterioration will accelerate as the temperature increases (Arrhenius Law). It is, therefore, usual to state a temperature at which the material will continue to operate normally and give an acceptable life; for electric cables, this...
given here to electrical, electronic and manufacturing engineering, and quantities in associated fields are, where necessary, assigned alternative or second-choice symbols. The units and symbols listed throughout this booklet conform to the recommendations of the International Electrotechnical
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Jul 7, 2004 · Acronyms and Abbreviations in Engineering. Acronym: An abbreviation formed from the initial letters of other words and pronounced as a word. example CAD. Abbreviation: a shortened form of a word or phrase. Example: DIA for diameter.
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A list of common abbreviations found on drawings or in general use in structural engineering, architecture and construction. As a rule it is poor practice to use specialist abbreviations on technical drawings.
