Basic electrical question

Discussion in 'Misc DIY' started by Jack, Sep 22, 2009.

  1. Jack

    Jack Guest

    Wiring my basement. I've got 20 amp circuits using 12/2 wire. The rough
    wiring passed the town's inspection. I need to wire two troffer lights.
    Due to their location, I need to use the armor cable to wire the lights to a
    junction box. Since I don't have the tools for the armor cable, I found a
    pre-wired 6 ft whip at HD. The wire in the whip is 14/2.

    Questions: Can I use this whip to connect the light to the 20 amp circuit at
    a junction box? Are there such things as 20 amp light fixtures? I had to
    use 20 amp plugs and switches, but I've never seen such a thing as a 20 amp
    light fixture.

    Thank you for your time.
    Jack, Sep 22, 2009
    #1
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  2. Jack

    BillGill Guest

    Jack wrote:
    > Wiring my basement. I've got 20 amp circuits using 12/2 wire. The
    > rough wiring passed the town's inspection. I need to wire two troffer
    > lights. Due to their location, I need to use the armor cable to wire the
    > lights to a junction box. Since I don't have the tools for the armor
    > cable, I found a pre-wired 6 ft whip at HD. The wire in the whip is 14/2.
    >
    > Questions: Can I use this whip to connect the light to the 20 amp
    > circuit at a junction box? Are there such things as 20 amp light
    > fixtures? I had to use 20 amp plugs and switches, but I've never seen
    > such a thing as a 20 amp light fixture.
    >
    > Thank you for your time.

    You can do it, but you will need to use a 15 amp breaker on that circuit.
    The breaker is supposed to protect the circuit, not what is connected
    to it. A 14 gauge wire is rated for 15 amps, so that is all you can
    use for a breaker.

    Bill
    BillGill, Sep 22, 2009
    #2
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  3. > Wiring my basement. I've got 20 amp circuits using 12/2 wire. The rough
    > wiring passed the town's inspection. I need to wire two troffer lights.
    > Due to their location, I need to use the armor cable to wire the lights to
    > a junction box. Since I don't have the tools for the armor cable, I
    > found a pre-wired 6 ft whip at HD. The wire in the whip is 14/2.
    >
    > Questions: Can I use this whip to connect the light to the 20 amp circuit
    > at a junction box? Are there such things as 20 amp light fixtures? I had
    > to use 20 amp plugs and switches, but I've never seen such a thing as a 20
    > amp light fixture.
    >
    > Thank you for your time.



    *All you need for BX or MC cable is a hacksaw and a pair of diagonal pliers.
    You strip the cable back by cutting the armor with the hacksaw at an angle.
    You then twist the armor off. I use diagonals or BX cutting pliers to trim
    the sharp edge. That is how it was done before RotoSpilts were invented.

    To answer your question; No you cannot use 14/2 on a 20 amp circuit. Light
    fixtures are usually rated only for the load that they will carry.
    John Grabowski, Sep 22, 2009
    #3
  4. Jack

    Chip C Guest

    On Sep 22, 9:06 am, "John Grabowski" <> wrote:
    > > Wiring my basement.  I've got 20 amp circuits using 12/2 wire.  Therough
    > > wiring passed the town's inspection.  I need to wire two troffer lights.
    > > Due to their location, I need to use the armor cable to wire the lightsto
    > > a junction box.   Since I don't have the tools for the armor cable, I
    > > found a pre-wired 6 ft whip at HD.  The wire in the whip is 14/2.

    >
    > > Questions: Can I use this whip to connect the light to the 20 amp circuit
    > > at a junction box?  Are there such things as 20 amp light fixtures?  I had
    > > to use 20 amp plugs and switches, but I've never seen such a thing as a20
    > > amp light fixture.

    >
    > > Thank you for your time.

    >
    > *All you need for BX or MC cable is a hacksaw and a pair of diagonal pliers.
    > You strip the cable back by cutting the armor with the hacksaw at an angle.
    > You then twist the armor off.  I use diagonals or BX cutting pliers to trim
    > the sharp edge.  That is how it was done before RotoSpilts were invented.
    >
    > To answer your question; No you cannot use 14/2 on a 20 amp circuit.  Light
    > fixtures are usually rated only for the load that they will carry.


    I'd also remind the poster to pick up a pack of the red plastic
    bushings that you're supposed to use on the ends of armored cable.

    Chip C
    Chip C, Sep 22, 2009
    #4
  5. "Chip C" <> wrote in message
    news:...
    On Sep 22, 9:06 am, "John Grabowski" <> wrote:
    > > Wiring my basement. I've got 20 amp circuits using 12/2 wire. The rough
    > > wiring passed the town's inspection. I need to wire two troffer lights.
    > > Due to their location, I need to use the armor cable to wire the lights
    > > to
    > > a junction box. Since I don't have the tools for the armor cable, I
    > > found a pre-wired 6 ft whip at HD. The wire in the whip is 14/2.

    >
    > > Questions: Can I use this whip to connect the light to the 20 amp
    > > circuit
    > > at a junction box? Are there such things as 20 amp light fixtures? I had
    > > to use 20 amp plugs and switches, but I've never seen such a thing as a
    > > 20
    > > amp light fixture.

    >
    > > Thank you for your time.

    >
    > *All you need for BX or MC cable is a hacksaw and a pair of diagonal
    > pliers.
    > You strip the cable back by cutting the armor with the hacksaw at an
    > angle.
    > You then twist the armor off. I use diagonals or BX cutting pliers to trim
    > the sharp edge. That is how it was done before RotoSpilts were invented.
    >
    > To answer your question; No you cannot use 14/2 on a 20 amp circuit. Light
    > fixtures are usually rated only for the load that they will carry.


    I'd also remind the poster to pick up a pack of the red plastic
    bushings that you're supposed to use on the ends of armored cable.



    *Good point Chip. The antishort bushings usually come with a roll of BX or
    MC. I don't know if they are supplied with prefabricated whips.
    John Grabowski, Sep 22, 2009
    #5
  6. Jack

    windcrest Guest

    On Sep 22, 7:40 am, "Jack" <> wrote:
    > Wiring my basement.  I've got 20 amp circuits using 12/2 wire.  The rough
    > wiring passed the town's inspection.  I need to wire two troffer lights..
    > Due to their location, I need to use the armor cable to wire the lights to a
    > junction box.   Since I don't have the tools for the armor cable, I found a
    > pre-wired 6 ft whip at HD.  The wire in the whip is 14/2.
    >
    > Questions: Can I use this whip to connect the light to the 20 amp circuitat
    > a junction box?  Are there such things as 20 amp light fixtures?  I had to
    > use 20 amp plugs and switches, but I've never seen such a thing as a 20 amp
    > light fixture.
    >
    > Thank you for your time.


    Tools? I just bend it till the spiral pops, then use standard wire
    cutters to clip the spiral, trim it square, put in a plastic anti-
    shorting bushing at the end before it goes into the box connector.

    I rarely see an electrician in Chicago do it any other way than this.
    Ive never seen anyone use a hacksaw either because its so easy with
    the bend pop and clip method I described.
    windcrest, Sep 23, 2009
    #6
  7. Jack

    Heathcliff Guest

    On Sep 22, 7:40 am, "Jack" <> wrote:
    > Wiring my basement.  I've got 20 amp circuits using 12/2 wire.  The rough
    > wiring passed the town's inspection.  I need to wire two troffer lights..
    > Due to their location, I need to use the armor cable to wire the lights to a
    > junction box.   Since I don't have the tools for the armor cable, I found a
    > pre-wired 6 ft whip at HD.  The wire in the whip is 14/2.
    >
    > Questions: Can I use this whip to connect the light to the 20 amp circuitat
    > a junction box?  Are there such things as 20 amp light fixtures?  I had to
    > use 20 amp plugs and switches, but I've never seen such a thing as a 20 amp
    > light fixture.
    >
    > Thank you for your time.


    I agree with the other posters who say that the tools required are
    very basic. You should expect to need some tools when doing your own
    wiring. But that being said, if you want to use the whips, you can
    replace the wire in them. Just attach your 12/2 wire to the wire in
    the whip (e.g., by twisting them together) and pull through. --H
    Heathcliff, Sep 24, 2009
    #7
  8. Jack

    Jack Guest

    Heathcliff, great idea. This is just what I did. Easy fix. Thanks for the
    tip.

    "Heathcliff" <> wrote in message
    news:...
    > On Sep 22, 7:40 am, "Jack" <> wrote:
    >> Wiring my basement. I've got 20 amp circuits using 12/2 wire. The rough
    >> wiring passed the town's inspection. I need to wire two troffer lights.
    >> Due to their location, I need to use the armor cable to wire the lights
    >> to a
    >> junction box. Since I don't have the tools for the armor cable, I found
    >> a
    >> pre-wired 6 ft whip at HD. The wire in the whip is 14/2.
    >>
    >> Questions: Can I use this whip to connect the light to the 20 amp circuit
    >> at
    >> a junction box? Are there such things as 20 amp light fixtures? I had
    >> to
    >> use 20 amp plugs and switches, but I've never seen such a thing as a 20
    >> amp
    >> light fixture.
    >>
    >> Thank you for your time.

    >
    > I agree with the other posters who say that the tools required are
    > very basic. You should expect to need some tools when doing your own
    > wiring. But that being said, if you want to use the whips, you can
    > replace the wire in them. Just attach your 12/2 wire to the wire in
    > the whip (e.g., by twisting them together) and pull through. --H
    Jack, Sep 28, 2009
    #8
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