(57) An electrical contact assembly eg. for a track lighting system comprises a housing
(20) carrying bus-bars (20) in supports, preferably integrally moulded with the housing,
adapters (30) for electrical devices and having contacts (32), a slot (34) extending
along the housing and means (26,28) cooperating with the adapters (30) to locate them
at desired positions with a portion (36) projecting through the slot (34) so that
the contacts (32) register with the bus-bars (24). The adapters (30) comprise means
(36,58,60) to lock them on the housing only when correctly oriented and which, as
the adapter (30) is locked moves the contacts (32) into contact with a corresponding
one of the bus-bars. The locating means (26,28) and portions (52,54) are preferably
visible to facilitate mounting. An earth contact preferably engages the associated
bus-bar before the other contacts.
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