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The Seven Types of Power Problems (#18) PDF

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.

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The Seven Types of Power Problems (#18) PDF

This was originally posted on APC forums on 2/21/2011


I enjoyed reading your Seven Types of Power Problems but I have a suggestion. I think it would be helpful for readers, especially home users, to add another example in the section on Sag - Undervoltage. You mention flickering of lights, but the problem I had was not a rapid flickering but a momentary dimming of lights for a few seconds or longer whenever an appliance motor cycled on and off, such as in a refrigerator, furnace, or especially a clothes dryer. An electrical contractor advised me that my service level was likely adequate for the size of house and to contact the power utility and request a line check. He explained that the likely culprit was a faulty neutral side connection somewhere between the power pole and the electrical panel inside the house. I did request a line check "due to dimming of the lights," which the utility promptly performed the same day. I have not expeerienced the problem again since that time.