I seem to remember reading somewhere here that these crowfoot 120V receptacles were some of the, if not the first grounding devices here in the states. It predates the NEMA 5-15, actually it predates NEMA. When a device needed to be grounded it used this crowfoot instead of the 1-15, simply because the 5-15 didn't exist yet. Later, after introduction of the 5-15(ok well after!)the crowfoot configuration was designated 10-20
[This message has been edited by IanR (edited 08-03-2005).]
