Low Voltage Problem: Do I Need to Rerun Wiring?

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SUMMARY

The discussion centers on a low voltage issue encountered after attempting to replace a hanging light with a ceiling fan. The user pulled existing wiring and installed it in a new junction box, but neither the ceiling fan nor the old light turned on afterward. Participants suggest that the user may be misreading voltage with a digital voltmeter, indicating a possible open connection rather than actual low voltage. They recommend checking the voltage at the switch and inspecting the circuit breaker or fuse for faults.

PREREQUISITES
  • Understanding of basic electrical wiring concepts
  • Familiarity with using a digital voltmeter
  • Knowledge of circuit breakers and fuses
  • Experience with junction box installations
NEXT STEPS
  • Learn how to properly test voltage at a switch using a digital voltmeter
  • Research troubleshooting techniques for open connections in electrical circuits
  • Understand the installation and requirements for ceiling fan junction boxes
  • Explore safety protocols for working with household electrical systems
USEFUL FOR

Homeowners, electricians, and DIY enthusiasts who are troubleshooting electrical issues related to lighting and ceiling fan installations.

mumblemouth
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had a hanging light in diniing room. wanted to replace with a ceiling fan but junction box would not hold a ceiling fan. so went into attic pulled existing wire only about 6 inches up to remove from junction box. placed wiring in new junction box after it was secured. after installing ceiling fan , would not turn on. tried to replace old light that was there would not turn on. tested wiring and now have low voltage... ? do i have to rerun the wiring from the outlet to the switch due to defective wiring? any other ideas?
 
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Let me guess. You are using a digital voltmeter. I suspect it is simply picking up the AC field in the 'air' and giving you this reading. I suspect you have NO voltage. A connection is open somewhere. In this scenario I would say to myself: "What did I do that would/could cause this?"
 
Try checking for voltage at the switch.
Check the fuse or circuit breaker to see if it's good.
 

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