Abstract: A clamping device includes: a first jaw mounted on a first support member, a second jaw mounted on a second support member, movable relative to the first support member to bring the first and second jaws toward each other in a clamping position, an actuation member adapted to move the second support member relative to the first support, and a compression member such as a spring between the actuation member and second support member. Advantageously, the first jaw is hook-shaped and the second jaw is ring-shaped. Advantageously, at least the second jaw, the compression member, and a handle of the actuation member have substantially rotational symmetry around a main axis.

Abstract: The invention relates to a method of determining the characteristics of the voltage of an electrical installation which is powered by a generator. The inventive method comprises the following steps consisting in: generating at least one electrical disturbance between at least two points of an electric circuit, which are separated by a dielectric layer; observing a first electric current at the terminals of a first impedance; bringing an electrode into contact with a point of the electrical installation; observing a second electric current at the terminals of a second impedance; observing the change in the first electric current at the terminals of the first impedance; and determining the characteristics of the voltage of the installation from the change in the first electric current and the characteristics of the second electric current. The invention also relates to a device which is used to implement said method.