Glossary terms subset beginning with M

Click one of the letters above to go to the page of all terms beginning with that letter.
Magnetic Fields
Magnetic fields can occur naturally or be man made. Magnetic fields are produced by the flow of electric current through a wire. The higher the current, the stronger the magnetic field. The strength of a magnetic field is measured in micro tesla (mT). When a piece of electrical equipment is switched off, there is no flow of current so there is no magnetic field. Magnetic fields are strongest close to their source and drop off quickly as we move away from the source. Unlike Electric Fields the strength of a magnetic field is not influenced by the voltage on the wire at all. All Transpower's new lines are designed and operated so that they comply with the International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines for electric and magnetic fields.
Maximum Approval Cost
The maximum amount that the Commerce Commission has approved for this project.