Mounting arrangements for electrical power circuits

Claim 1

A mounting arrangement and a power circuit comprising a casing adapted to be mounted upon a fixed support, said casing defining an enclosure having an open end, a lid which can close the open end of the casing, means for establishing a seal between the lid and the casing, a support frame secured to the lid, cooperating guide means on the frame and casing, the power circuit including heat producing components which are mounted on the lid or are in heat conducting relationship with the lid, a socket mounted on the casing and facing the open end of the casing and a plug carried on the frame for engagement with said socket to effect electrical connection to the power circuit, said plug and socket being guided for engagement by said guide means as the frame is passed into the casing, said power circuit including a capacitor, a switch operable upon initial movement of the lid and frame from the casing, said switch being connected in a discharge circuit for said capacitor whereby the capacitor will be discharged upon operation of said switch.