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Residential power wiring: mounting electrical box outside?

Discussion in 'Electrical Engineering' started by DaveC, Oct 14, 2004.

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  1. DaveC

    DaveC Guest

    Need to put an alarm buzzer (outside rated) on an external stucco wall. The
    buzzer has a 3/4 opening on the back of the 4x4 cast housing for a standard
    conduit / flex fitting or strain wire clamp / bushing.

    Have outdoor (NEMA 3, I think) 6x6x4 box.

    Buzzer needs to face away from stucco wall.

    So, how best to mount these? If I use NEMA box, cover is on face (away from
    wall), and I don't think you can mount anything on a cover (inspector might
    not like that : -). Any other surface faces the buzzer in a direction other
    than away from the wall.

    If I mount the buzzer directly on the wall, this puts the 3/4 hole against
    the wall. Is it acceptable to put conduit or flex through the wall directly
    to the back of the buzzer?

    Other orientations?

    Suggestions welcome.

    Thanks,
    --
    Please, no "Go Google this" replies. I wouldn't
    ask a question here if I hadn't done that already.

    DaveC

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  2. DaveC

    DaveC Guest

    The 3R box I have has no hole. Planned on making my own hole (not threaded).
    Buzzer has 3/4 hole on back (not threaded). Is it the *threaded* hole that
    makes this OK?
    Can't I just use an electrical close nipple and nut between the two
    non-threaded 3/4-inch holes? Probably lots of caulk / sealer, too.

    Thanks,
    --
    Please, no "Go Google this" replies. I wouldn't
    ask a question here if I hadn't done that already.

    DaveC

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  3. DaveC

    DaveC Guest

    So you would recommend using the NEMA 3 box and not directly mounting the
    buzzer to the wall?

    Can I run conduit or flex or romex directly into the back of the NEMA box
    from inside the stucco wall? As someone else suggested, using lots of caulk
    or other sealant between the box and the wall...

    Thanks,
    --
    Please, no "Go Google this" replies. I wouldn't
    ask a question here if I hadn't done that already.

    DaveC

    This is an invalid return address
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  4. DaveC

    DaveC Guest

    Buzzer was old installation, which I am re-configuring (installing new alarm;
    buzzer was part of old alarm). Don't know mfgr...
    Buzzer consists of its own cast box (approx 4x4) w/ 3/4 hole in the back, and
    cover. Cover consists of square buzzer mechanism ( grille, diaphragm,
    electro-mech buzzer ), with pigtails. Splice can be made within the buzzer's
    cast box.
    --
    Please, no "Go Google this" replies. I wouldn't
    ask a question here if I hadn't done that already.

    DaveC

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  5. DaveC

    DaveC Guest

    Yes, it's a weatherproof box (cast housing; o-ring between buzzer
    cover/mechanism and box), outdoor rated, so the label says...

    My question is more about how to get connections from within the stucco wall
    into the buzzer box. 3/4 hole in the back of the box accepts standard
    connection. Since this is at the wall/box interface, possibility of water
    intrusion exists (no matter how well you seal it). What is best to use here?
    Is romex with screw clamp sufficient? Armor cable? Waterproof?

    Thanks,
    --
    Please, no "Go Google this" replies. I wouldn't
    ask a question here if I hadn't done that already.

    DaveC

    This is an invalid return address
    Please reply in the news group
     
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