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Thread: routing ROMEX® cable and ABS pipes in 2x4 framing

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  1. #1
    lucy
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    Default routing ROMEX® cable and ABS pipes in 2x4 framing

    Hi everybody

    I'm putting in a new bathroom in my 2nd floor and have just come to the startling realization the the ROMEX® and the ABS need to coexist in the wall! All of the electrical books act as if there is no plumbing and the plumbing books act as if there isn't electrical wiring to contend with so I'm looking for some advice.

    My DWV system for two side by side pedestal lavs is based on a photo that Terry has posted before
    http://terrylove.com/images/lav_rough_double_b.jpg
    a 1 1/2 fixture cross with a 2 inch drain. In my case, the drain can't go straight down vertically into the floor but instead needs to take a 90 degree bend to the right and slope down the wall about 5 feet before turning down.

    The trouble is, with inset medicine cabinets, 2 sconces on either side of the cabinets, 2 sets of switches for the lights and fan and receptacles (GFCI protected) on either side of the lavs I'm not sure how to manage where the paths of the ROMEX®, the ABS and maybe the PEX supply pipes will need to cross!

    Can anybody help a handy gal out? I know I will have to put in nail plates to protect, but what concerns should I have about the routing of the the wiring? Can anybody share any rough-in photos showing AFTER the electrical wiring is installed?

    Thanks, Lucy
    Last edited by Terry; 12-07-2011 at 10:46 AM.

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    If you are using a 2x4 wall, then most plumbers will put the waste and vents toward the back.

    This gives the front of the studs for the water lines.

    The plumbing always goes in first, sorry electritians, you lose!

    The wiring can bend and snake around the plumbing. It's not a problem for them.

  3. #3
    DIY Junior Member billybobcory's Avatar
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    In general, not related to this particular bathroom question, but everywhere in new construction, can I share the same holes the pipes and pex are routed through with romex? This way I don't have to drill so many holes for the Romex.

  4. #4
    Moderator & Master Plumber hj's Avatar
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    quote; All of the electrical books act as if there is no plumbing and the plumbing books act as if there isn't electrical wiring to contend with

    That is not unusual, because electricians act the same way. I have always said that electricians must take a special class in how to run a 1/2" conduit through a ball park and not leave room for any other trade. But it is amazing what a conduit bender can do to EMT, a torch to PVC, and a Sawzall to everything else.
    Licensed residential and commercial plumber

  5. #5
    DIYer, not in the trades LLigetfa's Avatar
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    Quote Originally Posted by hj View Post
    ... and a Sawzall to everything else.
    LOL You start out dis'n electricians and then dis' your own trade with that comment?

    http://elitehomeinspections.net/mone...ictures-!.html
    Floor joist damaged by plumber. Plumbers should not be allowed to own or rent a sawzall!

  6. #6
    Moderator & Master Plumber hj's Avatar
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    quote; Plumbers should not be allowed to own or rent a sawzall!

    That reminds me of a motel we did in the 50s. The floors were 1 2/8" single layer plywood. We had to cut the "finish" floor to install the plumbing. The joists also had to be headered for the closet bends. The carpenter foreman lived behind my house, although we were not "friends". I asked him to have his men cut the floors and do the headering, because whatever was cut out had to be put back so the tile would fit properly. He told me, "You need the floors cut, then cut them". I replied, "That is not a problem, but after I cut them, your guys will need to do a lot more work to repair the floors". After thinking about it a bit, he decided to do the cutting.
    Licensed residential and commercial plumber

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