House lights dim for a few seconds
When you run the blow dryer, does the voltage dip for every receptacle in the house or just the receptacles on the same circuit as the blow dryer?
(You will need an experienced electrician for this one) Does the voltage, as measured in the big service wires (not the lugs) as they enter the main breaker, dip when the air conditioner kicks on?
It is not unusual for the voltage to dip at all the homes on the street fed by the same pole transformer, when an AC unit or a heat pump kicks on in one of the homes. Here, a momentary dip from 120 to 114 is not considered abnormal.
While you are at it, you can retorque (loosen a quarter of a turn and then retighten quite hard but not with tremendous strength) all the set screws on the neutral and ground terminal strips (or bus bars) and all the screws holding the hot wires in the breakers (turn off each breaker in turn first). Loosening the screw first helps clean off oxidation and improve the connection. Have an electrician do the main breaker big lugs for you.
You may get some improvement in voltage stability if you go from one outlet or switch to the next, undoing one at a time any back stab (push in) connections and using the screw terminals instead, and also retorquing all existing screw connections.
The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.
Last edited by AllanJ; 06-02-2010 at 09:13 AM.