I'm in the process of changing non-GFCI receptacles in our unfinished basement, bathrooms, and kitchen to be GFCI receptacles.
Today I started looking at one particular receptacle on circuit 3. The voltages were what I expected: between hot and neutral and hot and ground were in the 120V range, and between neutral to ground zero. But after I turned the power off, I did a resistance test and was surprised by the results. (I'm using a Fluke 114 multimeter.) If I'm misunderstanding what resistance readings I should expect to see, then I will be glad to be corrected. Here's what I'm seeing:
Is my "Expected" column correct? I re-checked some of the other receptacles I've been working on. Those on circuits 2 and 3 showed the odd resistance readings, though the GFCI receptacles I've installed on those circuits are working fine and a plug-in outlet circuit tester shows normal. The GFCI receptacles I've installed on a number of other circuits all have the expected readings.
There is an ongoing question as to whether circuits 2 and 3 are an MWBC, since at least for a certain distance from the panel they share the same cable. I was planning on having an electrician check these circuits at some point, since I'd like to have AFCI breakers installed on them, and I'm not going to do that myself. Would being an MWBC have anything to do with these odd resistance readings?
I'm concerned about these readings, and I'm not sure what my next step should be. Should I get an electrician in to investigate this? Thanks.
Today I started looking at one particular receptacle on circuit 3. The voltages were what I expected: between hot and neutral and hot and ground were in the 120V range, and between neutral to ground zero. But after I turned the power off, I did a resistance test and was surprised by the results. (I'm using a Fluke 114 multimeter.) If I'm misunderstanding what resistance readings I should expect to see, then I will be glad to be corrected. Here's what I'm seeing:
Code:
[U]Expected[/U] [U]Seeing[/U]
H to N Infinite 10 ohms
H to G Infinite 18 ohms
N to G 0 ohms 9 ohms
There is an ongoing question as to whether circuits 2 and 3 are an MWBC, since at least for a certain distance from the panel they share the same cable. I was planning on having an electrician check these circuits at some point, since I'd like to have AFCI breakers installed on them, and I'm not going to do that myself. Would being an MWBC have anything to do with these odd resistance readings?
I'm concerned about these readings, and I'm not sure what my next step should be. Should I get an electrician in to investigate this? Thanks.