I want to run some FMC from the bottom of my main panel and out the wall and connect into EMT.
Is there a proper connector to join the FMC to an LB? I'm assuming you can't just use the set screw in an EMT LB.
My original plan is to drill a knockout in the back of a metal junction box and use an FMC->Threaded connector and terminate it that way, then connect the EMC to a side knockout and fish the wire through. I'm wondering if there is an easier way to just connect the FMC to an LB.
Do the threads on a FMC to JB connector fit in the threads of a rigid LB?
The bend in the FMC + connector needs to be able to fit in a 2x6 wall.
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Current plan: From the main panel (which is mounted in the wall), I want to run a short piece (~3ft) of 3/4" FMC down the wall behind drywall and bend it to a 90 degree elbow to meet up with an LB on the surface of the drywall. The FMC will connect with the short side of the LB with the cover facing out. The connection between the FMC and LB will likely be behind/within the drywall. On the long end of the LB, I will have a run of 3/4" EMT (~40ft) that will terminate at a 2 gang metal box that will house a 14-50 outlet (box sized properly for the outlet). In this conduit run, I will have 3 #6 wires (black, black, white) and a #10 ground wire (green), all THHN. I plan to terminate the green wire in the outlet box as well as connect it to the correct terminal on the outlet using a 2 hole mechanical lug. Using #6 as I may convert this from a 50amp circuit to 60amps in the future (for an EV charger).
I'm using FMC as I don't believe I can make a 3/4" EMT sweep elbow work in the 2x6 wall (not enough room). I understand that FMC can be used to ground the run in certain situations, but I am running the ground anyway. It sounds like it may be needed if I use a connector from the FMC to LB that isn't necessarily meant for that purpose. I have taken into consideration pull points along the way due to the number of degrees of bends in the conduit.
The conduit body / LB I'm planning on using is a Morris 14247. Not sure if it is volume marked or not. From what I understand, for #6 wire and smaller, you can use the same size conduit body as the conduit you are using for your run (assuming wire fill is appropriate).
If the FMC / LB connection is questionable, I will just replace the LB with an 8x8 junction box (yup probably too big) and connect the FMC to the back of the junction box and run the wire out through the side into EMT.