Electrical Capacity Issues

The electrical service provided to a home is measured in amps, which is a measure of the "flow rate" of electricity through a wire. Today’s average home is constructed with electrical service of 100 amps, which means that the large main wires entering the home can safely handle 100 amps of current before there is a risk of overheating. Some homes however, are built with 200 amp service while homes built prior to the 1950s were built with 60 amp service. In order to determine the electrical capacity of the home, an inspector will check the size of the wires entering the home to verify they are compatible with the main electrical disconnect (breaker or fuse). Modern homes are equipped with breakers to detect if too much current is flowing through the wires. The breaker will shut off to prevent overheating of the wire, which is a potential safety hazard.

A home’s electrical capacity is dependant on the demand within a home. The more electrical fixtures and appliances there are, the larger the service requirement. Appliances with the highest demands include stoves/ovens,

Grounded electrical systems were implemented as a safety feature in homes after the 1950s. Copper grounding wires provide a path to redirect potentially harmful electricity to a safe location if an element of the electrical system malfunctions. A ‘hot’ wire that comes loose and contacts the metal casing of an electrical fixture or appliance can cause this ‘stray’ electricity. For example, if a washing machine malfunctions the stray electricity should be guided through the grounding wire of the appliance to the grounding wire of the home’s electrical system. Ground wires should be connected to all areas of the electrical system (i.e. fuse panels, light fixtures, outlets, junction boxes, etc.) providing electrically unobstructed paths to minimize the risk of shock. Prior to the 1950s, electrical systems were constructed without ground wires as noted by two-pronged outlets. Older homes with three-pronged outlets have had a grounding system installed - or a two-pronged outlet replaced for

the potential for past or current unsafeconditions. If these conditions are observed, a qualified electrician should be contacted to investigate the cause further.