3 gang recessed outlet box

[Paulski]

I am installing a recessed box that will have 120v and low voltage a/v cables. I figured I need a 3 gang - the 120v side has 4 NMC 12/2 coming in, nutted together and feeding a receptacle on the box (calculated box size 30 cu in), then the 3rd gang will be a plate to connect the av stuff. I found this arlington DVFR3W box, it has all 3 gangs molded together and has a divider to separate the low and 120v, but I need open space behind the low volt to feed the a/v cables, one is a digital optical cable that needs long radius bends. Is it ok to cut out the molded gang section behind the a/v portion? basically making it the inverse of the arlington 1 gang 120v/2 gang low voltage DVFR3C one?

DVFR3W:

https://www.amazon.com/dp/B003FMVQAI/?tag=atomicindus08-20

DVFR3C

https://www.amazon.com/dp/B003E48CP4/?tag=atomicindus08-20

My other idea is to get a 2 gang Arlington DVFR2W recessed box and use it just for the 120v

DVFR2W

https://www.amazon.com/dp/B001XQ4JFC/?tag=atomicindus08-20

Than cut another hole in the wall and put in a single gang low voltage recessed box.


An important detail in figuring this out is there is already a hole in the wall that fits a 2 gang Arlington box, so i figure I need to make that bigger for a 3 gang or add another hole for a single gang next to it

 

[ycgoat]

Make sure there is enough hollow space in the wall between studs for the set up you chose. Technically you should not modify the box for your fiber but I don’t think any one will get upset

 

[mrVanagon]

I'm not sure what the goal is for the finished face of your box but something like this might work if you can bring two of your NM cables into a box in the top and two into a box in the bottom with an NM jumper between them.

https://www.amazon.com/dp/B08TRLGS1Y/?tag=atomicindus08-20

 

[luvtheheat]

I would never mix 120 VAC and low voltage AV cables in the same box.

 

[TurnipTruck]

$114 seems unreasonable. I have installed many two gangs, never needed a three gang, but I’m not far from a troglodyte.

 

[rharman]

I would never mix 120 VAC and low voltage AV cables in the same box.

I wouldn't either but I understand it's code acceptable with the appropriate box and divider.

 

[luvtheheat]

I wouldn't either but I understand it's code acceptable with the appropriate box and divider.

It might be "code acceptable" but I doubt "code" gives a sh** about alternating current interference on Cat5-6/CATV lines.

 

[dave*99]

It might be "code acceptable" but I doubt "code" gives a sh** about alternating current interference on Cat5-6/CATV lines.

I've used dozens of the Arlington divided boxes with AC on one side and Cat6/5 RG6. telephone, speaker on the LV side. My buddy is an AV installer and he has installed hundreds maybe thousands.

There are 11 of them in my current house. AC and 2 CAT6 jacks in each.

No issues at all.

 

[dave*99]

This is what you need. I used several of these.
Arlington TVBU507-1 TV Box Recessed Outlet Wall Plate Kit, 3-Gang, White, 1-Pack https://www.amazon.com/dp/B003E48CP4/?tag=atomicindus08-20