Turning your electricity on and off

Main Switch

Know the location of your main electric panel, so you can turn off the power supply to your entire facility quickly in case of emergency.


  • Know the location of your fuse box or circuit-breaker panel.
  • Know the correct sizes of fuses needed and keep spares on hand. Blown fuses must be replaced, not repaired. Do not replace a fuse with one of higher amperage.
  • If a fuse blows, disconnect or turn off the equipment that may have caused the problem.
  • Shut off the main electric switch before replacing a fuse.

Circuit Breakers

  • Know how to reset a circuit breaker. After turning off or unplugging equipment on the circuit, push the switch firmly to the off position, and then back on. If the overload is cleared, power will be restored.
  • If your circuit breakers trip off repeatedly, there could be a problem with the equipment on that circuit. If the equipment is unplugged but the circuit breaker trips off again, call an electrician.