There are two (2) voltage levels used in IEC, low voltage ( < 1000 V ) […]
In previous articles Single Earth Electrode and Earthing Resistance Calculation, I have presented methods of calculating […]
The resistance of a single earth can be calculated if the soil resistivity is known. An […]
IEC 60079-14 (2007) Clause 8.2 Electrical isolation, states that: To allow work to be carried out […]
Working space generally applies to the protection of the worker. Dedicated equipment space applies to the […]
The Philippine Electrical Code allows a Metal Underground Water Pipe as a grounding electrode. Metal […]