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I am working through various symbol articles to see if they would be improved by using an infomative infobox rather some images. I am conscious of my ignorance of this subject so thought it best to consult before going ahead. Note in particular that the infobox Comments welcome, please. --John Maynard Friedman (talk) 16:39, 5 December 2019 (UTC)[reply]

Added a 'different from' (distinguish) electrical earth field in infobox. --John Maynard Friedman (talk) 21:14, 6 December 2019 (UTC)[reply]