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when toggle format what by license comment
Feb 6, 2018 at 7:44 comment added mateos @BrianDrummond could be added as another answer
Dec 28, 2013 at 21:09 vote accept everything1burrito
Dec 28, 2013 at 15:52 comment added Kaz @BrianDrummond Indeed, imagine if it was a smooth, ceramic cylinder. In heavy rain, a rivulet of water could easily run along its length between the two terminals.
Dec 28, 2013 at 10:23 comment added user16324 Plus the shape is intended to ensure at least part of the "cup" stays dry in most normal weather; water tends to reduce the surface impedance.
Dec 28, 2013 at 10:07 history answered Andy aka CC BY-SA 3.0