The methods and systems of lower the grounding potential of an AC electrical grid for protecting a potable water delivery systems from corrosion due to a chemical redox reaction between protective concentration of disinfection chemicals in water and iron, lead and/or copper metal pipes within the potable water delivery system. The methods protect the surface of interactive metals more noble than zinc. These methods are also effective in corrosion protection of the national metallic infrastructure of metals more noble than zinc, such as street signs, lights stands, bridges, and any systems connected to the electrical grid.

A method of installing an electrical grounding system at a site can comprise the steps of inserting a hollow electrode into a hole formed into native soil at the site, the hollow electrode comprising an electrically conductive tube configured for communication with a fault current source, and a carbon fiber layer in conductive relationship with at least a portion of the electrically conductive tube; positioning the hollow electrode in the hole circumferentially around a ground member driven into native soil at a bottom of the hole; and electrically interconnecting the ground member and the hollow electrode.

Mounting devices for an elongate flexible member, such as an electrical cable passing through the wall of a structure, are described. The mounting devices may include an elongate body having a longitudinal axis and elongate recesses that are inclined with respect to the longitudinal axis. An internal passageway for the elongate flexible member may pass through the elongate body parallel to the longitudinal axis, and apertures corresponding to the recesses may be disposed in the outer peripheral face of the elongate body. An engagement member, such as a ball, may be mounted in each recess and move along the recess. The engagement members, recesses and the apertures may be dimensioned to allow the engagement members to project partially beyond the outer peripheral face of the elongate body but to prevent the engagement members from leaving the recesses through the apertures in the outer peripheral face of the elongate body.

A data storage system including a docking station, and a dockable external data storage device operates in an underwater environment. The dockable external data storage device includes a housing, a memory disposed within the housing to store data, and a connector assembly mounted on the housing. The connector assembly includes at least one optical transmitter configured to transfer data from the memory to a corresponding optical receiver in the docking station. The connector assembly also includes a self-passivating electrical contact configured to transfer electrical power to the dockable external data storage device from a corresponding power contact in the docking station.

A data storage system including a docking station, and a dockable external data storage device operates in an underwater environment. The dockable external data storage device includes a housing, a memory disposed within the housing to store data, and a connector assembly mounted on the housing. The connector assembly includes at least one optical transmitter configured to transfer data from the memory to a corresponding optical receiver in the docking station. The connector assembly also includes a self-passivating electrical contact configured to transfer electrical power to the dockable external data storage device from a corresponding power contact in the docking station.

An electrical connection assembly for subsea applications includes an electrical conductor cable electrically connectable to a winding of an electrical load and electrically connectable to an electrical power source; a first insulating element configured to be placed over the winding; a second insulating element placed over the electrical conductor cable; the first insulating element partially overlaps the second insulating element, the first insulating element is sealed onto the second insulating element.

An electrical connection assembly for subsea applications includes an electrical conductor cable electrically connectable to a winding of an electrical load and electrically connectable to an electrical power source; a first insulating element configured to be placed over the winding; a second insulating element placed over the electrical conductor cable; the first insulating element partially overlaps the second insulating element, the first insulating element is sealed onto the second insulating element.

A penetrator assembly, for high pressure and/or subsea applications, includes a body. The body includes a first end surface, in operation subject to a pressure of a high pressure environment; a second end surface distanced from the first end surface, which in operation is subject to a pressure of a low pressure environment; at least one connecting passage connecting the first end surface to the second end surface; at least one groove extending from the first end surface towards the second end surface, being distanced from second end surface and surrounding the connecting passage and including an annular opening on the first end surface; and annular lips between a first portion of connecting passage adjacent to the first end surface and the groove, the annular lips in operation being subject to the pressure of the high pressure environment and providing a pressure balance around the first portion of connecting passage.

A penetrator assembly, for high pressure and/or subsea applications, includes a body. The body includes a first end surface, in operation subject to a pressure of a high pressure environment; a second end surface distanced from the first end surface, which in operation is subject to a pressure of a low pressure environment; at least one connecting passage connecting the first end surface to the second end surface; at least one groove extending from the first end surface towards the second end surface, being distanced from second end surface and surrounding the connecting passage and including an annular opening on the first end surface; and annular lips between a first portion of connecting passage adjacent to the first end surface and the groove, the annular lips in operation being subject to the pressure of the high pressure environment and providing a pressure balance around the first portion of connecting passage.

An object of the present disclosure is to provide a control apparatus by which interference between signals can be avoided. A control apparatus (10) according to the present disclosure includes: an instruction unit (11) that instructs a monitoring apparatus to perform processing for monitoring a submarine cable; and a control unit (12) that controls a submarine device connected to the submarine cable. The monitoring apparatus, in response to the instruction given by the instruction unit (11), sends a monitoring signal into the submarine cable and performs the monitoring processing, and the control unit (12) detects a timing at which the monitoring processing is not being executed, and then sends a control signal into the submarine cable and controls the submarine device.