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A difficult-to-predict electrical failure is the continuity failure. Pressure junctions are common problem sources for continuity failures. Available tools to search for pressure-junction problems include low-resistance testing, temperature monitoring using physical contact between sensor and heated part, pyrometer temperature monitoring, infrared photography, and visual inspection. While each method is effective, each of these methods has one or more disadvantages. This white paper describes a breakthrough patented method of directly calculating conductor and pressure-junction impedance, resistance, and reactance using the noisy harmonic-laden switching-transient-laced (in other words, normal) load current flowing through an electrical distribution system.