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open neutral {Ans: In Split 240/120V systems one cause for AC equipment to fail depending on unbalanced legs is.....}increase {Ans: if resistance decreases, and voltage remains constant, then average must _____}When you replace old wire the correct process is.... {Ans: label old wire and fold back out of the way of new wire}oscilloscope {Ans: what tool is used to detect harmonic distortion}the engine negative terminal or the DC main negative bus {Ans: If an AC system is installed the main AC system grounding bus shall be connected to what?}isolation transformer isolates all current crying AC system conductors and the AC drowning conductor, Polarization transformers do not isolate the AC grounding conductor. {Ans: Difference between an isolation transformer and polarization transformer}