Field question sent to me needs qualified answers ......
My concern: the electrical system checks out o.k., except for a 15 amp branch circuit which feeds three outlets ... one in the front, one in the rear, and one in the garage where the GFCI protection for this circuit is also located (GFCI outlet).
The problem that I have found, using a SureTest ST-1D, is excessive voltage drop.
This circuit runs from the panel to the garage (about 30 feet), then to the remaining two outlets (total of about 50 feet of cable).
The garage outlet shows an 8% voltage drop under a 15 amp load. The front outside outlet shows an 8.2% drop, and the rear outlet shows a 12% drop under the same load (15 amp).
I advised the local code inspector of this, and he was not interested in hearing about it, replying that nothing in the rules address voltage drop.
A state inspector did, however, give me the specifics on enforcement to deal with this problem, and indicated that there must certainly be a problem with this circuit if the voltage drop is that high.
A retired code inspector friend of mine agreed, and gave me a scenario that he would use to find problems:
plug in a 15 amp load and turn it on. He said the problem will become readily recognized when the sparking and smoking begins.
There is a desire to know whether or not there really is a problem, and I am considering meeting with my clients, and powering an 1800 watt appliance (hair dryer) off this circuit.
This will allow me to test available voltage while the appliance is on, and should also confirm my initial and repeat test results of the excessive voltage drop.
Any advice or comments? Thanks