Tolerable Risk – IEC 62305-2
In performing risk assessment as an essential step in the application of IEC 62305, the calculated risk of loss due to lightning shall be below the tolerable level. Tolerable risk …
IEC 62305 – Risk Assessment Process
Risk assessment is a essential step in the application of IEC 62305. Risk assessment is required to determine the need and extent of protection measures to reduce the risk of …
Resistance of a Single Earth Electrode
The resistance of a single earth can be calculated if the soil resistivity is known. An earth rod driven vertically, the electrode resistance can be calculated using the following formula. …
Standards and Statutory Laws
What do NFPA 70 and AS/NZS 3000 have in common? The former is National Electrical Code (U.S.) and the later is the Wiring Rules (Australia and New Zealand). Both are …
IEC Equipment Voltages
There are two (2) voltage levels used in IEC, low voltage ( < 1000 V ) and high voltage ( > 1000 V ). Medium voltage, inspite being oftenly used …
IEEE and IEC Interface
A project dealing only with either IEEE or IEC standards is not an issue. If there will be mix standards within a single project, then compliance becomes an issue. In …