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by Marks_A_Lot on May 26th, 2009
Voltage is the equivalent to pressure in a fluid flow system... Turn on a faucet at one location the pressure drops at the other... Same applies for electric... the wires at a given voltage can only pass so much current.... Is there a danger... not really .. the circuit breaker or fuse will prevent too much current flow preventing the voltage from dropping ridiculously low...
by douglasmkilmer on May 26th, 2009
The voltage drop is due to the resistance of the wires to current flowing thru the wires in the wall that connect the receptacle to the fuse box (or circuit breaker box). A 1500W space heater draws about 13.6 amperes of current. The wires are probably number 14 gauge and they are rated at about 20 Amperes so it is safe. Also, the receptacles that go up are on the other half of the 240 volts that the electric company is supplying: 123 + 117 = 240. Most homes really have 240 split into two 120 volt zones within the house. However, if you put load on the other receptacles, they will show a voltage drop too.
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You're reading My electrical receptacle drops from 120Vac to 110Vac when I turn my space heater (1500W) on. The distance between the breaker box and the receptacle is about one story. Other receptacles in the home change to either 123Vac or 117Vac. Why? Safe?
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