By Brian Scaddan
"Get quick entry to all of the phrases, words and abbreviations you are going to encounter whereas learning or operating within the electric undefined. Entries are defined intimately with diagrams and illustrations used to give an explanation for advanced issues. this is often an necessary source for college kids enrolled in NVQ Technical certificate, urban & advisor Diplomas and for plenty of others operating and learning within the construction undefined, making it an awesome spouse to any electric installations textbook"--P.  of cover. Read more...
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Extra resources for Dictionary of electrical installation work: illustrated dictionary: a practical A-Z guide
See also Surge protection) In I∆n The nominal current rating or setting of a protective device. The residual operating current of an RCD. c. current flows in a conductor, an alternating magnetic field is produced around it. g. iron or steel,the fluctuating magnet field causes an emf/voltage to be induced in that material. This may produce a potential shock risk, and, together with circulating currents known as eddy currents, it will produce heat. I If, however, another conductor is run with the first, and it carries current in the opposite direction, the magnetic effects are cancelled out and no induced emfs/voltages/eddy currents will occur.
Electromagnetic compatibility (EMC) Most modern electrical systems, and in particular electrical equipment, produce electromagnetic waves which, at a sufficiently high frequency, can cause malfunction of other equipment. We have all encountered the restriction in the use of mobile phones, for example, on aircraft. This electromagnetic interference (EMI) is becoming an increasing problem as more and more electronics impinge on our lives. Hence there are a set of Regulations called ‘The Electromagnetic Compatibility Regulations 2005’, which provide requirements for electrical and electronic products in order to achieve electromagnetic compatibility.
They are also in a position to withdraw a supply to an installation if it is considered unsafe or could interfere with the public supply. Electromagnetic compatibility (EMC) Most modern electrical systems, and in particular electrical equipment, produce electromagnetic waves which, at a sufficiently high frequency, can cause malfunction of other equipment. We have all encountered the restriction in the use of mobile phones, for example, on aircraft. This electromagnetic interference (EMI) is becoming an increasing problem as more and more electronics impinge on our lives.