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As well as finding this problem, the tester also shows simulated amp loads at 12 amps, 15 amps and 20 amps, to determine voltage drop on the circuit.
Amp loads represent the electrical draw of anything connected to that circuit in order to operate it. It may be a lamp or a window air conditioner; each drawing a certain level of amps in order to function. As amps flow increase, voltage in the line many times will drop. The NEC recommends no more than 5% voltage drop under full amp draw for a circuit. And any reading below 108volts can lead to premature failure of appliances and possible fire.
In this case, this circuit under a 20 amp load is experiencing a 19.7% drop in line voltage, down to 95.4 volts. In other words, this means an appliance drawing 20 amps is being starved for voltage.
We also offer Forward Looking Infrared (FLIR) Thermal Imaging upon request. This service is a separate charge from a normal home inspection fee. Thermal imaging, shows hidden problems such as moisture, missing insulation, and electrical defects that go unseen by the naked eye in a normal inspection. Under certain circumstances FLIR can show the presence of termite activity.
You walk into a home and look at a wall over a sliding glass door (photo on left) you see a wall. With FLIR Thermal Imaging we see much more, in this case missing insulation. It is your clue that further investigation is needed to determine the cause.
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