My building is due to be delivered in the next few weeks. Looking for some tips on how to go about running wire and mounting boxes. I think the side panels will be horizontal so I could use the channel in them to run the wire right? Self tappers to mount boxes to? Bought 3 extra trusses so the upright tubes will be every 3 1/2 feet instead of 4 1/2 feet. I do eventually plan on insulating. I do not plan on framing and building teal walls inside like I’ve seen some people to so everything will have to mount to the 12ga 2” x 2” square tube. Shop will see fab work as well as machine tool work and building race cars and maintaining and housing at least one race car
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Wiring square tube metal building
- Thread starter Bradc1989
- Start date
AP514
Well-known member
Us MC Cable like this link.....
https://www.homedepot.com/p/Southwire-14-2-x-100-ft-Solid-CU-MC-Metal-Clad-Armorlite-Cable-68579223/202316369
Just get it from a good supplier. Mount boxes to the tubes or side wall purlins.
That is how I did it.
https://www.homedepot.com/p/Southwire-14-2-x-100-ft-Solid-CU-MC-Metal-Clad-Armorlite-Cable-68579223/202316369
Just get it from a good supplier. Mount boxes to the tubes or side wall purlins.
That is how I did it.
theoldwizard1
Well-known member
My building is due to be delivered in the next few weeks. Looking for some tips on how to go about running wire and mounting boxes. I think the side panels will be horizontal so I could use the channel in them to run the wire right?
If that is your plan you need special plastic "anti short" bushing as the wire transition from the electrical box to the metal tubing. You also need something to protect the wire on internal corners.
readhead
Well-known member
MC will be your best bet and metal boxes. The MC will fit in the horizontal ribs.
nadogail
Well-known member
IMHO, MC which many still call BX is very appropriate for this job. Every package of MC I have purchased comes with a bag of plastic bushings to protect the conductors.
alfredeneuman
Well-known member
You talk about it if it's a requirement. It isn'tIf that is your plan you need special plastic "anti short" bushing as the wire transition from the electrical box to the metal tubing. You also need something to protect the wire on internal corners.
You don't need anti-short bushings on MC cable. The mylar jacket protects it from shorts.
You need them on AC (BX) cable, as it has a paper jacket.
I talked directly with a Southwire rep, and he said that the bag of A-S bushings were just provided as an "added degree of protection".
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YukonXL04
Well-known member
You talk about it if it's a requirement. It isn't
You don't need anti-short bushings on MC cable. The mylar jacket protects it from shorts.
You need them on AC (BX) cable, as it has a paper jacket.
I talked directly with a Southwire rep, and he said that the bag of A-S bushings were just provided as an "added degree of protection".
I dont know for sure to reference code, but I know our inspectors here in Texas specifically look for them and will fail you if you don't have them. There is a hole in MC connectors that allows you to see the red bushing without taking them apart. Been there done that.
alfredeneuman
Well-known member
I dont know for sure to reference code, but I know our inspectors here in Texas specifically look for them and will fail you if you don't have them. There is a hole in MC connectors that allows you to see the red bushing without taking them apart. Been there done that.
MC connectors and AC connectors are one in the same, and that's why they have the hole. There is no place in the Code where they're required for MC.
Southwire make both MC and AC cables and they, if anyone, should know their own product requirements.
YukonXL04
Well-known member
MC connectors and AC connectors are one in the same, and that's why they have the hole. There is no place in the Code where they're required for MC.
Southwire make both MC and AC cables and they, if anyone, should know their own product requirements.
Interesting. Well I know we have had inspections fail for not using them on MC around here. So rather than fight and argue most inspectors, we just slip them in and carry on.