(a) If you are purchasing an older home, you will need some type
of electrical work or upgrade done to meet the demands of new
electronic equipment in use today.
(b) If the lights in your home go dim when you plug an
electrical appliance in.
(c) Even the simplest installations should be done by a
qualified electrician. I have had customers who replaced a 40 watt
light bulb with a 100 watt bulb because they did not have enough
light. This can cause a fire!