Wiring neatly done. All connections inside a plastic or metal electrical box. All electrical boxes have a proper cover. 15 or 20 amp fuses blow regularly. Extension cords used as a permanent part of the system.
Lights dim when an electric appliance is turned on.
Use of adapters to increase the number of appliances plugged into one receptacle. Three or more electrical panels in a single family home. Messy wiring practices. Most older home electrical systems can be upgraded into safe and fully functional systems without a complete re-wiring of the home. For example, a new kitchen may require further upgrades to the electrical capacity of the entrance.