Solar panel grounding lug assemblies and systems are disclosed. The grounding lugs may include a top member having a grounding wire channel and an aperture, a bottom member having an aperture, and a fastener inserted through the apertures. The fastener may couple the top member to the bottom member and secure a grounding wire within the grounding wire channel.

A connector comprises a pressing assembly and a contact prevention member. The pressing assembly has a first receptacle receiving a first conductor, a pressing member which can be activated from an exterior of the pressing assembly, and a chamber. The contact prevention member has a contacting slot open to an interior of the contact prevention member and a second receptacle receiving a second conductor. The contact prevention member is insertable into the chamber of the pressing assembly in an insertion direction.

A ground connection structure includes a ground terminal fitting (20) with a bolt hole (28). Resilient locking pieces (29) are formed on an inner peripheral edge of the bolt hole (28) and are locked to an externally threaded portion (13) of a stud bolt (12). A rotation stopping portion (31) is formed on the ground terminal fitting (20) and is locked to a rotation stopping hole (14) of a plate-like ground member (10). A resilient retaining piece (32) is formed on the rotation stopping portion (31) and is configured to restrict separation of the rotation stopping portion (31) from the rotation stopping hole (14) by locking to an edge part of the rotation stopping hole (14).

A connector includes: a plate-shaped conductor having a through hole through which a fastening member is inserted; a housing holding the conductor and having an abutment surface; a nut having a screw hole into which the fastening member is screwed, and fixed to the housing along a first direction that is a direction in which the conductor extends; a support member fixed to the housing and restricting the nut from escaping from the housing; and a holding structure holding the nut, wherein the abutment surface is a surface against which a side surface of the nut abuts, such that the screw hole is positioned to be concentric with the through hole, and the holding structure holds the nut in a state where the side surface of the nut abuts against the abutment surface.

An electrical nut assembly for coupling an electrical lug to an electrical post is disclosed. The electrical nut assembly comprises a compression fitting and a compression sleeve. The compression fitting comprises a material comprising a first yield strength and comprises an internal thread operable to electrically couple to the electrical post and a base surface configured to electrically couple to the electrical lug. The compression sleeve comprises a material comprising a second yield strength greater than the first yield strength and is sized to at least partially cover the compression fitting. The compression sleeve is configured to compress the compression fitting in a radial direction when fitted at least partially over the compression fitting and pressed or advanced axially towards the base surface and as the compression fitting makes contact with the electrical lug.

A busbar contact includes a contact ring and a fastening element. The contact ring has a contact surface at a distal end and a press-in flange projecting radially. The press-in flange has a cylindrical contact surface pointing radially outward.

A terminal includes: a flat surface portion; an extending portion continuous with the flat surface portion; a branch portion continuous with the extending portion and extending in a direction different from that in which the extending portion extends; and rotation stop portions continuous with the branch portion. When the terminal is attached to a bolt protruding from a fixing member and including a seat separated from the fixing member, the flat surface portion contacts the seat, the rotation stop portions extend from the branch portion toward a base end of the bolt in a protruding direction of the bolt, and at least a pair of the rotation stop portions are positioned to sandwich the seat in a direction intersecting the protruding direction to prevent rotation of the terminal with respect to the bolt.

An electrical contact element having a frame clamp comprises a frame with a stationary thread, a clamping shoe and a clamping screw engaging in the stationary thread and being supported on the clamping shoe. A plastic holder with a cavity having two insertion openings arranged on opposite walls of the cavity is provided for inserting two electrical conductors to be contacted with one another, in which the frame clamp is arranged. The frame clamp is captively fixed in the cavity of the plastic holder by means of a latching. The frame clamp is mounted in a floating manner in the cavity of the plastic holder in the direction of at least one axis, which is oriented orthogonally to an insertion direction of the electrical contacts into the insertion openings.

A grounding clamp includes a plate having a first and second opposite longitudinal edges extending in a first direction, and first and second opposite transverse edges extending perpendicularly to the longitudinal edges in a second direction. First and second cable fastening region extend along the first and second transeverse edges, respectively, and are configured to fasten and electrically contact first and second cables to the plate, respectively. An opening is arranged between the cable fastening regions for inserting a fastener. An arm extends from the first or second longitudinal edge in the second direction so that the arm runs parallel to the first and/or second cable fastening region. A tab extends at a free end of the arm parallel to the first and/or second longitudinal edge and perpendicularly to a plane of the plate in a direction of an underside of the plate.

A post insulator, a post insulator keeper, and a method of securing a conductor on a post insulator are provided. A post insulator includes: an electrically insulative case including an abutment surface defining a recess; and a keeper rotatably coupled to the case between an open position in which a conductor is receivable into the recess, and a closed position to maintain the conductor in the recess.