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Building Components ...

Electrical System

There are a wide variety of electrical systems with an even greater variety of components.  Your NAHIPA Member Inspector will carefully evaluate the condition of the visible electrical system and check for any improper wiring and hazards.  In addition to the main panel and sub-panels, your inspector will examine and test readily accessible outlets, switches, fixtures, circuit breakers, and GFCI outlets throughout the home. 

Most homes today have at least a 100 amp power supply with 110/220 voltage capability, which was normal residential capacity until the mid-1960’s.  Today, many jurisdictions have electric codes that require a minimum electrical capacity of 100 amps and in some even require 150 or 200 amps.  However, electrical codes are not retroactive, and therefore many older residential systems do not comply with the latest safety standards.  A 100 amp service, may be adequate if the home has gas appliances rather than electric.  Most newer homes are built with 200 amp service and 400 amp service is commonplace in larger homes  An inadequate electrical system containing overloaded circuits or defective wiring and outlets can pose a severe safety and fire hazard. 

There are many different varieties of electric panel boxes.  The National safety standards require electrical panels to be weatherproof, readily accessible, and have a minimum of 36 inches of clear space in front of them for service.  In addition, the panel should have a main disconnect, and each circuit should be clearly labeled. 

The panel box must be installed correctly and sized properly to handle the incoming electrical service lines, and the lines used to distribute the electric current for each circuit in the home.  Overcrowded and corroded boxes pose a hazard and need to be addressed.  Most modern homes use circuit breakers for overload protection although many older homes and some equipment use fuses. 

Sometimes there is more than one electrical panel.  Usually the line providing electrical service comes into the main panel, which then distributes the power to the other service panels. However, that is not always the case.  In any event, your NAHIPA Member Inspector will examine all of the accessible electrical service panels during your home inspection. 

Ground fault circuit interrupter (GFCI) outlets are required by code when outside, in a garage, in an unfinished basement or within 6 foot of a water source such as kitchen countertops and bathrooms.  Additionally, all exterior outlets should have proper covers. 

Industry standards require that we test a representative sample of outlets, switches, and light fixtures.  However, your NAHIPA Member Inspector will attempt to test every one that is unobstructed and accessible at the time of the inspection. 

System of drainpipes in the basement

Building Component Topics: Attics | Chimney | Electrical | Exterior | Foundation
Heating & Cooling | Plumbing | Roof | Safety Systems

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