A method for detecting connectivities in an electrical power distribution grid, wherein said electrical power distribution grid comprises a series of electrical power distribution lines , with each electrical power distribution line having a series of load connection points connected thereto, each load connection point including at least one client meter , wherein the method comprises: - injecting a code signal having a given duration and synchronized with a carrier signal of the power grid into a line of said electrical power distribution grid by means of at least one portable test equipment (TE) having the capacity to determine its geolocation and a clock synchronized with an external server, located in the connection of a client meter , selected from said series of load connection points ; - acquiring, by said test equipment (TE), information referring to its geolocation and the instant in time in which it injected said code signal, generating a signal injection record, and sending said generated signal injection record together with information relating to the connection point where the code signal has been injected to a remote computation server (SC) by means of a communication unit of the test equipment (TE); - detecting the code signal by a receiving equipment (RX) located at the head end of the electrical power distribution grid , or at least upstream of the point where the test equipment (TE) is located, having the capacity to determine its geolocation and a clock synchronized with said external server; - acquiring, by the receiving equipment (RX), the instant in time in which it detected the code signal, generating a signal detection record, and sending said generated signal detection record to said computation server (SC) by means of a communication unit of the receiving equipment (RX); and - matching up said signal injection record and signal detection record by said computation server (SC) for correlating the connection point with a given a transmission line and a given head end, and identifying connectivity conditions of the mentioned connection point. - injecting a code signal having a given duration and synchronized with a carrier signal of the power grid into a line of said electrical power distribution grid by means of at least one portable test equipment (TE) having the capacity to determine its geolocation and a clock synchronized with an external server, located in the connection of a client meter , selected from said series of load connection points ; - acquiring, by said test equipment (TE), information referring to its geolocation and the instant in time in which it injected said code signal, generating a signal injection record, and sending said generated signal injection record together with information relating to the connection point where the code signal has been injected to a remote computation server (SC) by means of a communication unit of the test equipment (TE); - detecting the code signal by a receiving equipment (RX) located at the head end of the electrical power distribution grid , or at least upstream of the point where the test equipment (TE) is located, having the capacity to determine its geolocation and a clock synchronized with said external server; - acquiring, by the receiving equipment (RX), the instant in time in which it detected the code signal, generating a signal detection record, and sending said generated signal detection record to said computation server (SC) by means of a communication unit of the receiving equipment (RX); and - matching up said signal injection record and signal detection record by said computation server (SC) for correlating the connection point with a given a transmission line and a given head end, and identifying connectivity conditions of the mentioned connection point. <EOS>