A foldable extension enclosure for a utility enclosure, each having first, second, third, and fourth sides connected by hinges and each folding only in one direction by means of detents on the sides. A first end of the first side slidably overlaps a second opposite end of the third side and a first end of the second side slidably overlaps a second opposite end of the fourth side. There is an internal top ledge on each side in an interior near a top end of the extension enclosure and the utility enclosure and an external bottom ledge on each side on an exterior near a bottom end of the extension enclosure, to mount the extension enclosure to the utility enclosure with concave and convex detents. Convex detents are at the top end of the utility and extension enclosures and concave detents are at the bottom end of the extension enclosure. The convex detents also reversibly lock a lid to the tops of the utility and extension enclosures.

Pullboxes for enclosing utility components and methods of manufacturing the same are provided. In some embodiments, a pullbox has at least one knockout section that is an area of the sidewall of the pullbox that has a reduced thickness. Apertures to receive conduits through the knockout section can be created with far less effort that traditional pullboxes. The conduits allow various utility components to pass through the wall of the pullbox. In addition, the discrete knockout section preserves the structural integrity of the pullbox, and the knockout section can have features that promote certain actions during a molding process for manufacturing the pullbox. Additional features such as a reinforcement mesh embedded in the pullbox in a certain manner and location are also described herein.

An electrical grounding system can include an electrically conductive column configured for communication with a fault current source, wherein the electrically conductive column can include an open-ended copper tube, and carbon fiber fabric assembled onto at least a portion of the electrically conductive column, the carbon fiber fabric having a conductive relationship with at least a portion of the electrically conductive column.

A connection device for charging an electric vehicle includes a main unit on which a charging socket is arranged for plugging in a charging cable for connecting to the electric vehicle or to which the charging cable is connected directly. The connection device includes an additional connection with a separate additional housing on which an additional charging socket for a further charging cable is arranged or to which the further charging cable is connected directly.

A plate having an upper surface and a lower surface, a center point, and an outer perimeter. It further includes a plurality of clips for temporarily securing the plate in an opening in a landscape box. Each of the plurality of clips comprises a limb, extending vertically downward, the limb having the form of a rectangular plate and being upper bound by an upper edge and lower bound by a lower edge, wherein the upper edge is attached to the lower surface of the plate. The limb further includes a foot extending horizontally sideways from the lower edge.

A lid for a utility enclosure having a front end, a rear end, a right side, a left side, a top lid portion, and a bottom, defining an interior. Large reinforcement ribs are on an interior surface of the top lid portion and form a lattice-type structure. Small reinforcement ribs are mounted in spaces formed by the lattice type structure. The lid is made of glass fiber-reinforced polypropylene and metal bars or rebar are embedded in the large reinforcement ribs. The metal bars are positioned near a bottom of the large reinforcement ribs and spaced above the bottom. The physical structure of the lid and the lid's composition, consisting essentially of glass fiber-reinforced polypropylene, are constructed so that the lid withstands up to 33,750 pounds of force without breaking or being deformed.

A method of forming and assembling a foldable plastic utility enclosure using molds to form sides of the enclosure, preferably using glass fiber-reinforced thermoplastic composite. The molds are constructed to form a central hole in hinge members which are formed on ends of the sides. The central hole of the hinge member is molded with two molding parts, wherein one or both of the molding parts have a solid central portion that forms the central hole. The sides are removed from the molds after curing and the sides are assembled to form the utility enclosure while the sides are still hot from the molding process. Hinge pins are inserted into the central holes of the hinge members to form hinges and to prevent the sides from warping during cooling. Assembling the sides and inserting hinge pins to form the utility enclosure is completed within approximately 10 minutes after removing the sides from the molds.

An apparatus for limiting event energy in an underground structure having free space includes: an inner layer configured to envelope and seal an interior volume; an outer layer configured to envelope the inner layer; and, wherein the interior volume includes a volume-occupying material, having a solid material, a semi-solid material, a gaseous material, or any combination of the solid, the semi-solid, and the gaseous material.

A lid for a utility enclosure having a front end, a rear end, a right side, a left side, a top lid portion, and a bottom, defining an interior. Large reinforcement ribs are on an interior surface of the top lid portion and form a lattice-type structure. Small reinforcement ribs are mounted in spaces formed by the lattice type structure. The lid is made of glass fiber-reinforced polypropylene and metal bars or rebar are embedded in the large reinforcement ribs. The metal bars are positioned near a bottom of the large reinforcement ribs and spaced above the bottom. The physical structure of the lid and the lid's composition, consisting essentially of glass fiber-reinforced polypropylene, are constructed so that the lid withstands up to 33,750 pounds of force without breaking or being deformed.

A method of forming and assembling a foldable plastic utility enclosure using molds to form sides of the enclosure, preferably using glass fiber-reinforced thermoplastic composite. The molds are constructed to form a central hole in hinge members which are formed on ends of the sides. The central hole of the hinge member is molded with two molding parts, wherein one or both of the molding parts have a solid central portion that forms the central hole. The sides are removed from the molds after curing and the sides are assembled to form the utility enclosure while the sides are still hot from the molding process. Hinge pins are inserted into the central holes of the hinge members to form hinges and to prevent the sides from warping during cooling. Assembling the sides and inserting hinge pins to form the utility enclosure is completed within approximately 10 minutes after removing the sides from the molds.