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open circuit

  1. Electrical
    Hi, First, thanks in advance for your assistance in helping me understand the following question that has me perplexed. Suppose there are two wires, A and B, a DC power source, and a light bulb. Suppose both wires A and B have zero (0) voltage difference between them and the ground of the...
  2. Electrical
    In the course of rewiring portions of my 1939 home I encountered an outlet box with a duplex and single outlet - no grounding of course. The single was disconnected and a lone red wire was hanging behind it. The duplex was pigtailed to three hot and three neutrals. When I shut off the breaker...