Underground resistance: Frost and dryness can increase the resistance of earth-rod electrodes
Article Abstract:
When designing an earth system, BS 7671: Regulation 522-02-02 states that soil drying and freezing should be considered. Frost and dryness are the main culprits responsible for increased resistance, and a 2 m or 3 m rod electrode with initial 350 V reading, is generally considered more stable to seasonal changes. Soil conditions should be considered before undertaking earth resistance testing.
Publication Name: Electrical Contractor
Subject: Engineering and manufacturing industries
ISSN: 0308-7174
Year: 1999
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Spreading old software ideas
Article Abstract:
Computer software needs to be continually upgraded, although spreadsheet files are an exception. Spreadsheets are used to produce listing, schedules and reports, and can also be used for electrical design calculations. They are easy to follow and handle, although they do not usually provide graphics and do not include interactive databases.
Publication Name: Electrical Contractor
Subject: Engineering and manufacturing industries
ISSN: 0308-7174
Year: 1996
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