Need advice on best way to mount electrical outlet next to table saw

[Reggie Burnett]

I ran 2" conduit under my slab and have run my 110 and 220 wires through the conduit. My original "plan" was to use a type of anchor to mount a 3 foot 4x4 and run conduit up the 4x4 to a box. But I"m concerned that will be a bit wobbly. So I thought about simply using conduit and having it much closer to the floor -- like 4-6 inches off the floor. it will be a double gang box with 110 and 220 both in the box.

Any good ideas on how to mount that so it's not too shaky/wobbly?

Thanks!

[Jerry Bruette]

I'd use Unistrut anchored to the floor with wedge anchors if your floor is concrete. You can buy pre made bases for the Unistrut that look like a U channel welded to a square base that's pre drilled for the wedge anchors. Then you bolt a length of strut to the base and mount your conduit and box to the strut. Electricians do it all the time at work and it looks good and is sturdy.

[Bill Dufour]

Or just use a pillar box. Maybe lay a piece of 4x6 flat under it to raise it up some. Or a marine dock side unit.
Bil lD.

[Reggie Burnett]

Or just use a pillar box. Maybe lay a piece of 4x6 flat under it to raise it up some. Or a marine dock side unit.
Bil lD.

Can you explain your optoins a bit more? WHat is a pillar box? How would you see laying a 4x6 under it?

[Reggie Burnett]

I'd use Unistrut anchored to the floor with wedge anchors if your floor is concrete. You can buy pre made bases for the Unistrut that look like a U channel welded to a square base that's pre drilled for the wedge anchors. Then you bolt a length of strut to the base and mount your conduit and box to the strut. Electricians do it all the time at work and it looks good and is sturdy.

I like the thought of that. My local Lowes and Home Depot have superstrut which appears to be about the same thing. Im' going over now to see what they have.

[Jon Snider]

Or just use a pillar box. Maybe lay a piece of 4x6 flat under it to raise it up some. Or a marine dock side unit.
Bil lD.

Bill, could you expand on pillar box or marine options? I’ve been looking for a solution for floor receptacle other than a flush mount. So far all I’ve found is a Wiremold doghouse or tombstone style 525 but not sure if it could be modified for bigger 240v circuits.

https://www.platt.com/platt-electric-supply/Floor-Box-Accessories-Service-Fittings/Wiremold/525HB/product.aspx?zpid=402288.

[Reggie Burnett]

What do you think about just sticking the box on the conduit down very close to the floor? The shorter the conduit, the less bend and flexibility?

[Jerry Bruette]

As long as you don't mind doing your daily calisthenics every time you plug or unplug something.

[Bill Dufour]

Anything with marine in the name is about 10 times the cost of normal stuff. look at what builders use to get power to new home job sites from undeground power lines or mobile home power set ups. You could get a length of 6x6 square iron tube. Drill/cut a few outlet cutouts in the side weld internal tabs on the bottom for anchor bolts. slip on a wood cap. My brother bought a house with 3" pipe welded patio frame with wood roof. previous owner was ship welder. He welded on flat plates with the holes cut to mount outlets. He notched the pipes and sort of flushwelded them on
i would set 3" steel pipe into the concrete before pouring or weld a flat plate on bottom and anchor bolt it vertical. Make it about waist high. Drill 2-3 holes to clear 1/2 and 3/4 pipe. Them center a metal electrical box over the holes and drill/tap the pipe for mounting screws of say 1/4" diameter. Easy to drill the holes on the drill press before assembly. easy enough to plug unused holes.
Or glue up a 4x4 and a 2x4 after routing a wire run down the 4x4. Then mount the glued together piece using a simpson post base of some sort.
Bil lD.
look at how mail boxes are mounted to existing concrete sidewalk and curbs to get ideas..

https://www.eaton.com/us/en-us/products/low-voltage-power-distribution-control-systems/power-pedestals.html

https://www.homedepot.com/p/GE-RV-Pad-Mount-Pedestal-with-50-Amp-and-30-Amp-RV-Receptacles-and-20-Amp-GFCI-Receptacle-GE1LU532PS/300325107?mtc=Shopping-B-F_D27E-G-D27E-27_8_CIRCUIT_PROTECT_DEVICES-NA-NA-Feed-PLA-NA-NA-&cm_mmc=Shopping-B-F_D27E-G-D27E-27_8_CIRCUIT_PROTECT_DEVICES-NA-NA-Feed-PLA-NA-NA--71700000034238981-58700003943782709-92700048672399173&gclid=EAIaIQobChMIv5C3w-LP6AIVTj0MCh2p9wdfEAQYBSABEgKUa_D_BwE&gclsrc=aw.ds

(https://www.homedepot.com/p/GE-RV-Pad-Mount-Pedestal-with-50-Amp-and-30-Amp-RV-Receptacles-and-20-Amp-GFCI-Receptacle-GE1LU532PS/300325107?mtc=Shopping-B-F_D27E-G-D27E-27_8_CIRCUIT_PROTECT_DEVICES-NA-NA-Feed-PLA-NA-NA-&cm_mmc=Shopping-B-F_D27E-G-D27E-27_8_CIRCUIT_PROTECT_DEVICES-NA-NA-Feed-PLA-NA-NA--71700000034238981-58700003943782709-92700048672399173&gclid=EAIaIQobChMIv5C3w-LP6AIVTj0MCh2p9wdfEAQYBSABEgKUa_D_BwE&gclsrc=aw.ds)https://www.lowes.com/pd/Architectural-Mailboxes-Concrete-Pad-with-Base-Bracket-Black-Steel-Mailbox-Post/3031479


https://www.dockboxes.com/power-pedestals?gclid=EAIaIQobChMI9-vKoubP6AIVAz0MCh0UcwQsEAAYAiAAEgIRLfD_BwE

I wonder what elctric car charging station use?
i just realized an I beam or angle iron would be easier to run the cables in and still be protected pretty well.

[Bruce Wrenn]

I don't think the code allows for conduit to be only support for outlet boxes.

[Mark Katz]

https://www.platt.com/platt-electric...px?zpid=402288.
Jon, I looked up the link that you posted - just out of curiosity, I don't need one. Here is part of the description:

"Also known as: 786564015079, 525, toe stubber, WMD505HB, WMD525HB, Wiremold, 525HB, Floor Box - Service Fittings, Floor Box - Accessories, Boxes - Recessed, Boxes, Enclosures, dog house, doghouse"

Toe stubber!

[Mike Kees]

Reggie when I built my shop I ran conduit under my slab out to two locations in the open area of my floor just like you are talking about. My electrician used RV pedestals to Mount the receptacles. Works awesome. I have one with my sliding saw and cabinet saw on it as well as two 120v plugs. The other one currently powers my planer and also has two 120v circuits for extension cords or whatever. I installed the pedestals with drill in anchor bolts after drilling holes with a SDS hammer drill.

[Tom Bender]

How do the wires come thru the slab?

I think you need to have the 120 volts and 240 volts in separate boxes, not sure about the rules on mixed voltages in conduit.

[Reggie Burnett]

I didn't worry about separate boxes. Probably should have but the building doesn't meet code in other respects already. :)

[Frank Pratt]

How do the wires come thru the slab?

I think you need to have the 120 volts and 240 volts in separate boxes, not sure about the rules on mixed voltages in conduit.

No you don't.

[Charlie Velasquez]

I didn't worry about separate boxes. Probably should have but the building doesn't meet code in other respects already. :)

Good, then I won’t mention you have to deregulate the ampacity of those conductors in that 2” conduit..
;)

[Ryan Yeaglin]

I would also put a notion toward using strut. Unless you or someone you know works in a metal fab shop, the easiest solution is to use strut with a base plate. There are so many options there for mounting stuff. Electricians use it all the time for that reason and it's available from the big box stores so you can actually see what they have and what's available to use.

[Rollie Meyers]

Good, then I won’t mention you have to deregulate the ampacity of those conductors in that 2” conduit..
;)


Depends on how many conductors are in the conduit, and in response to another poster, you can have 480V, & 120V, in the same conduit as long as they are properly marked.

[Jim Andrew]

Sounds like it would really limit your ability to re-arrange your shop. I have moved things around since first setting up the shop, much better the 2nd or 3rd time. I have no reason to move my equipment more, really works nice now. My plugs hang from the ceiling, so I could move the table saw, and although I do not enjoy attic time, has worked out well.

[Frank Pratt]

Depends on how many conductors are in the conduit, and in response to another poster, you can have 480V, & 120V, in the same conduit as long as they are properly marked.

I should have been more clear in my previous post. You can put 120V and 240V circuits in the same box or conduit. Different story with 480V though. I'm going by the CEC (but it and the NEC are mostly harmonized), but you can't put circuits that are fed from different transformers in the same conduit. 120V & 480V are mutually exclusive and are derived from different system.

[ray grundhoefer]

You can mix voltages in the same conduit as long as all wire is rated for the higher voltage. The unistrut is a good idea. My concern would be how do you plan to transition from 2"pvc to a 2 gang box

[Kevin Goss]

I'd use 1-5/8" strut. Mount a strut floor plate like this P2072ASQ-EG. You can use 1/4 or 3/8 spring nuts if necessary to mount your box. You could chop off half that plate to get closer to your 2" conduit, or use 2 plates and mount stuff between 2 uprights. Mount to floor using wedge anchors or even probably tapcons. And if you still think theres too much wobble based on how high you go they sell 45* brackets to run a support to the floor. Personally I've installed uprights with wedge anchors and at 4 foot high there's such a small amount of wiggle it will work fine

[Charles Murray Ohio]

When I mounted the disconnects for mine I mounted a steel plate to the saw. The disconnects are on one side and an outlet on the other. Because this was in a garage I was required to mount it a minimum of 18" off of the floor, just in case I had any gasoline stored their.