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Some relay cores are represented by two parallel lines and others by three. Does the number of parallel lines have any significance?

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Saw this symbol in Tiny cad. What does three parallel lines in the picture imply?

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    \$\begingroup\$ A picture would help. \$\endgroup\$ – Andy aka May 29 '14 at 8:44
  • \$\begingroup\$ Here is some indication g3npf.co.uk/inductors.htm. It's for inductors though. But no standards mentioned. \$\endgroup\$ – Sohail May 29 '14 at 8:54
  • \$\begingroup\$ Number of lines has no significance - artistic freedom prevails in most cases. \$\endgroup\$ – Russell McMahon May 29 '14 at 13:43
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It would indicate an inductor (the coil) wound around an iron core (as opposed to no lines indicating an air-wound inductor).

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    \$\begingroup\$ And the number of lines only says how many lines the designer of the relay symbol thought looked good. \$\endgroup\$ – WhatRoughBeast May 29 '14 at 11:19

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