Patent ID: 7063574

Claim:
An installation coupler for connecting a first cable to a second cable while providing a free set of plug pin socket contacts, said first cable having a double female installation socket attached thereto and said second cable having a male installation plug attached thereto, said male installation plug comprising a set of male plug pins which include means for enabling the cores of said second cable to be attached thereto and said double female installation socket comprising first and second sets of plug pin socket contacts said sets of contacts being connected to one another, there being means for attaching the cores of said first cable to the two sets of contacts, said pins of the male installation plug and corresponding contacts in each of said sets of contacts in the double female installation plug having a configuration that allows the pins to be in register with the contacts of one of the sets of contacts, only when the male installation plug has a predetermined orientation relative to the set of contacts, wherein the male installation plug includes a protruding stop that at least partly obstructs the first set of contacts and prevents the male installation plug from connecting to the second set of contacts and that is clear of the second set of contacts and does not prevent the male installation plug from connecting to the first set of contacts.