What Is the Difference Between 120 & 115 Volt?

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Household appliances may be labeled for use with 120, 115 or even 110 volt outlets. Regardless of the number, actual voltage at the outlet varies; however, for all practical purposes, these outlets can be treated as if they are the same.

Background

Variability

  • The actual current supplied is required to fall in a range of plus or minus 5 percent, which equals 114 to 126 volts for 120 volt circuits, although the actual range is closer to 117 to 124 volts. Due to resistance in household wiring, the actual voltage at an outlet may be even lower, commonly as low as 110 volts.

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References

  • Photo Credit electric outlet image by Albert Lozano from Fotolia.com An Electricity Warning Sign. image by daseaford from Fotolia.com multimeter image by Aleksey Bakaleev from Fotolia.com lonely toaster image by Jake Hellbach from Fotolia.com
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