Some notes on the earthing of metal objects other than conductors

The importance of earthing metal bodies other than conductors is stressed by all electricity law-makers and is denied by few, if any, engineers. At the same time rules, regulations, etc., covering the installation and maintenance of electric plant and equipment strictly avoid specification beyond that vague expression ¿satisfactory.¿ The paper suggests a starting point for investigation having as its objective the defining of conditions which will preclude all possibility of dispute.