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Lighting circuit blown but fuse on the fuse board not damaged

Lighting circuit blown but fuse on the fuse board not damaged

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  #1  
Old 08-21-18, 12:27 PM
K
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Lighting circuit blown but fuse on the fuse board not damaged

Our house has. 4 floors and has old and odd wiring with lighting and sockets on the same circuit. All the lights on one circuit are not working; , only one was on at the time (,and went out with more of a bang than a phut), while one other out of 5 also blew; all the sockets are still functioning and the appropriate fuses on the fuse board (old style) is undamaged; it is ,a 30 amp fuse. What is going on?
 
  #2  
Old 08-21-18, 12:58 PM
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30 amp fuses have never been legal for residential 120v lighting circuits. The fuses need to immediately be changed to 15 amps to eliminate the fire hazard. If those fuses blow you have a dead short which needs to be found and corrected.
 
  #3  
Old 08-21-18, 06:26 PM
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What type of lamps are you describing? Incandescent lamps filaments open when it burns out. In the process of burning out an arc continues between the 2 pieces of the filament until the lamp voltage can't jump the gap. This is the flash seen when a lamp opens.Possible the arc caused a carbon deposit on a loose connection that now is insulating the connection from the remainder of the circuit. How did you verify the lamps were open? Also do you mean outlets when you say sockets?
 
  #4  
Old 08-28-18, 02:01 AM
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thank you so much for replying. It turns out that I was mistaken about the circuit including the lights - so no mystery after all. Thanks again for your time.
 
 

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