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    Superfluous grounding screw in Square D main panel?

    Sorry, I have no idea why the pics are sideways.
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    Superfluous grounding screw in Square D main panel?

    New happiness: 42 spaces with a generator interlock kit installed (and generator inlet plug installed outside) and plenty of room to permit remodeling a 43 year old kitchen and to add a few other lines.
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    Superfluous grounding screw in Square D main panel?

    So, before and after pics: Old hot mess: 20 space panel with 19 occupied. 11" wide box which leaves no room left for the gutters. The craziest thing is that once I removed the service cables, I found a sticker in the back of the panel identifying the box as a QON 20-40 MG200 Series L5 and...
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    Superfluous grounding screw in Square D main panel?

    Ta Da!!! mm08822 persistence has solved the problem. I finally did something smart and measured the depth of the recommended hole from the bar to the sheathing. It happens to be 1/8 inch deeper than the screw is long (1 1/2 vs ~1 7/16). So the next smart thing I did was get a bigger screw...
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    Superfluous grounding screw in Square D main panel?

    Anton, yeppers. The sheathing is visible at the back of that hole. I tried the screw there a couple of times with no luck. But, since you asked, I took another gander and even though it looks like some kind of interior lip at the panel, the screw just bottoms out on the sheathing without...
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    Superfluous grounding screw in Square D main panel?

    Thanks for the observations. You need the bonding screw installed at green circle That hole bottoms out on the plastic base of the bus mount. There are no threads inside to hold a screw, and unfortunately, it is also to small for the green screw provided. There is a square hole above the round...
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    Superfluous grounding screw in Square D main panel?

    Close up of the neutral, ground buses and main breaker. There just isn't a hole to fit the screw that goes through to the panel on the junction bar or on any of the buses. I'm thinking the screw is for some oddball case if someone uses the panel for a sub panel and disconnects the existing...
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    Superfluous grounding screw in Square D main panel?

    Picture of the outside meter box
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    Superfluous grounding screw in Square D main panel?

    Pic of the new panel hopefully attached
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    Superfluous grounding screw in Square D main panel?

    Zmax, are you saying under the screw hole is located under the main breaker?
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    Superfluous grounding screw in Square D main panel?

    There is an exterior meter box, which when the meter is pulled the house is de-energized. Does that count as an outside disconnect?
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    Superfluous grounding screw in Square D main panel?

    It is the main panel (which of course has the main breaker for the house). So I will install the screw. So the silly question is where? It is not obvious as the screw doesn't appear to be long enough to reach the box from the neutral bar.
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    Superfluous grounding screw in Square D main panel?

    I am replacing an old Square D 200 amp 20 space panel with a new Square D 200 A, 42 space panel, both QO series. The new panel came with a large box bonding (green) screw with the comment "When it is required to bond the box to to neutral, use screw on this card." My understanding is that...
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    20 amp 250V outlet question

    Thanks for the responses. My first thought is, well that just saved me a lot of trouble. Mucho gracias. My second thought is, I think I need to ge back and re-read some references. I had it pretty well set in my mind that certain larger -motored tools, e.g. tablesaws, larger jointers...
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    20 amp 250V outlet question

    I'm taking my little garage shop to the next level by converting a few tools to the 230/240V configuration, (from 115-120V) which requires 230-240V (250V) circuits. I got snagged previously for not having tamper resistant (TR) 120 V 20 amp receptacles. But as far as I can tell, there are no...
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    Recommendations for replacement outdoor main panel

    "Exactly. Split the neutral in the first j box and feed it to 2 GFCIs. Any imbalanced neutral current is on the line side of the GFCIs so there will be no nuisance tripping." I was not aware of that work around. I'll file it for future reference. But for now, I don't want to be opening walls...
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    Recommendations for replacement outdoor main panel

    The situation: My parents house is under contract. One of the inspection followup requests was to install GFCI outlets in wet spots - e.g. a couple of bathrooms and by the washing machine. I'm the trustee and power of attorney, so it's my responsibility. Two of the outlets I can replumb with...
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    Garage Master Plan – general Overall plan with specific focus on the electrical layou

    Color me demented. I should have reread my own thread. Extensive reading on this forum and elsewhere on the web, and shallow dives into the NEC is conclusive that you can't share a common neutral between a pair of single pole GFCI breakers. There is the above mentioned bailout - two-pole...
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    I'm going to take some heat for this...

    I count about eight pieces of furniture in there. I think everyone is missing the boat here. Let the wife have the garage and move your shop into the living room. It's probably more convenient for tv and fridge access anyway.
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    Garage Master Plan – general Overall plan with specific focus on the electrical layou

    So, the garage is underway. Drywall pulled down, upside down (useless) R-11 insulation cleared out and new wires run. Wiring for new overhead lights run with no problem. Wiring for "two" runs of fourplex outlets run with 12/3, with the intention of splitting the right and left side...
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