how to wire a shop.

Discussion in 'shop/garage Electrical related' started by grumpyvette, Sep 14, 2008.

  1. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

    [​IMG]
    while I vastly prefer 10 ga copper stranded wire IN 3/4" steel conduit for most electrical outlet work in any shop you have too admit this is a rather well laid out ROMEX job
     
    Last edited: Aug 25, 2015
  2. Indycars

    Indycars Administrator Staff Member

    That looks so nice, it could be painted on!
     
  3. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

    I recently had one of the breakers (40 amp) [​IMG]
    in my shops electrical panel, go bad, internally,so I pulled the main shop breaker and then replaced the smaller breaker after verifying the circuit was dead with my multi meter,
    Im not sure whats was wrong but it would pop, even with zero load, when set,
    [​IMG]
    cars use DC homes use AC current ,know the difference and use the correct meters

    http://www.amprobe.com/Amprobe/usen/Contests_Promotions/amp-25.htm?gclid=CJGbirzF59ACFUU2gQodJ6UIqA

    http://www.powerstream.com/DC-clamp.htm

    https://www.amazon.com/Amprobe-AMP-...1481301013&sr=8-9&keywords=fluke+dc+amp+meter

    http://en-us.fluke.com/training/tra...-digital-multimeter-plus-clamp-accessory.html

    I was rather concerned at first assuming it was being over loaded with a short circuit but after I replaced it with a new identical one the problem stopped and my amp meter showed it was popping even with a 15 amp load
    [​IMG]
    the only issue I had was a standard screw driver did not allow me too apply enough torque too loosen the screw that clamps the 10 ga copper wire firmly on the breaker,
    it darn sure was never over tightened to that extent, I had to grab a special tool
    [​IMG]
    https://www.craftsman.com/products/craftsman-mach-series-14-piece-3-8-t-handle-driver-and-bit-set
    with a 1/4" drive socket and a 4" slotted screw driver bit, which easily allowed me to loosen the clamp screw and replace the breaker.
     
    Last edited: Dec 9, 2016
  4. Indycars

    Indycars Administrator Staff Member

    We do like to apply torque to things!!!:D
     
  5. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member


    ok,You failed to mention the brand or amp rating,
    youll want to check local building codes and ,maybe draw a permit
    for a 220 volt plazma cutter youll need a separate and unique circuit, to feed the plazma cutter ,
    many plazma cutter require a 50 amp feed and that will MANDATE a 6 GA copper three wire feed, obviously read the installation requirements, don,t get cheap or stupid use the correct wire ga and breaker and run a new outlet
    youll also need the air compressor to run at the same time in many cases.
    I would run a 3/4" or 1" diam steel conduit from the outlet location to the breaker box and use a 3 conductor 6 gauge copper wire,
    if your not familiar with, and comfortable doing electrical work hire a local electrician.
    considering the potential danger if the wiring not correct its money well spent, even if its expensive


    youll need a 50 amp duel breaker that fits your electrical box
    youll need room in your electrical box for that breaker
    youll need to run an un-broken 3/4" or 1" steel conduit to the outlet location
    connectors and clamps and tapcon screws
    youll need the 3 conductor 6 ga copper wire the right length
    youll need the outlet and 4" electrical outlet box and face plate and outlet
    youll need a mounting cord


    https://www.homedepot.com/p/4-11-16...k-Cover-for-30-60A-Round-Device-888/202097240


    https://www.homedepot.com/p/1-in-x-10-ft-Electric-Metallic-Tube-EMT-Conduit-101568/100400409

    https://www.homedepot.com/p/Halex-1-in-Electric-Metallic-Tube-EMT-Set-Screw-Coupling-62810/202241090

    https://www.homedepot.com/p/Halex-1...tallic-Tube-EMT-Straps-4-Pack-26153/100124691

    https://www.homedepot.com/p/Leviton...w-Single-Outlet-Black-R10-00279-S00/300324414

    https://www.homedepot.com/p/Southwi...x-SIMpull-CU-NM-B-W-G-Wire-28894422/205357757

    obviously it helps a great deal if you have the instruction and installation specs, and the correct matching electrical plug cord
    [​IMG]

    [​IMG]
     
    Last edited: May 27, 2019
  6. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

    I spent several hours helping a buddy wire a 220 volt outlet in his shop for a new
    mig welder that required a 30 amp rated outlet.
    The Miller brochure says the Millermatic 180 requires 230v, 60Hz, 21.7 Amp circuit.

    he told me what he was quoted and I told him it was outrageous,,,
    and we could do the job in under 3 hours...
    and that included the acquisition of parts and installation,

    once I showed him exactly what was required, and we purchased the parts/components,
    from home depot,
    and went back to his shop and installed the wiring and outlet
    his comment..

    "Once you explained, :D what was required,
    several lengths of 3/4" conduit, and sweeps,
    in a bit more than a hundred feet of 8 ga wire, the outlet, outlet boxes, conduit clamps,
    conduit couplers and electrical breakers and a few other parts ,
    and I saw you and helped you install the wiring in the conduit,
    and installed the boxes, wired the outlet...
    I have to wonder what I was confused and concerned about and how in hell,
    any electrician can quote the prices they did.
    we spent less than two hours and $185 dollars to do a job that I was quoted, too cost $960":mad: and was told would take a day to complete."
     
    Last edited: Nov 3, 2020
  7. Indycars

    Indycars Administrator Staff Member

    Does anyone pull permits and go thru the inspection to add simple electrical circuits like above ?

    I never have.
     
  8. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

    I did when I built my personal shop and wired it...
    the county electrical inspector commented
    " that he had never in 30 years ever seen anyone else
    do as nice a job or use so heavy gauge wire on a non-commercial garage"
    he was amazed everything was in conduit, and every outlet run,
    and connection has a separate breaker,
    and all 8 dual GFI outlets were separate runs with only a pair of electrical outlets
    and even the 110 and 220 volt outlets had individual ground connections/
    but no! most people don,t bother... but its damn sure been done to EXCEED county electrical code requirements
    nothing was run with less than 10 ga copper and all the 220 volt outlets were 8 ga copper
    the last thing I wanted is electrical issues or potential fires
    but thats just a serious engineering background and knowing that doing it right up front,
    is far better than dealing with a less than ideal set-up later on,

    when I took bids on wiring my shop I got quotes of $12K-$13K to do things the way I wanted....:eek:
    and the electrical contractors:rolleyes: tried to tell me I did not need everything in conduit nor did I need separate individual runs
    :mad: or all 10 or 8 ga copper wire.:rolleyes:
    the component parts cost me only $4500 and it only took me and a couple of buddies 3 days
    that included electrical outlets, lighting and ceiling fans and an alarm system and telephone system with intercom

    [​IMG]
    [​IMG]
     
    Last edited: Nov 4, 2020
  9. Indycars

    Indycars Administrator Staff Member

    Yea that sounds like you alright !

    I've always wondered if I ever sold my house would I have a problem with the lights in the attic
    and outlets that I have added both 120v and 220v.
     
  10. T-Test

    T-Test solid fixture here in the forum

    Insurance may not pay off if it was done by owner with or without permits.
     
  11. T-Test

    T-Test solid fixture here in the forum

    I've always wondered if I ever sold my house would I have a problem with the lights in the attic
    and outlets that I have added both 120v and 220v.[/QUOTE]

    Who cares, you no longer own it or are responsible for it !!!!
     
  12. Indycars

    Indycars Administrator Staff Member

    What do you mean, I still own it and live there ?
     
  13. T-Test

    T-Test solid fixture here in the forum

    You said IF you ever sold your house. NO responsibility. Still living there means you have to have confidence in your own work. And you do !!

    The house is not burning !!:D:D:):)
     
  14. T-Test

    T-Test solid fixture here in the forum

    What a Lift.png New way to wire a shop?
     
  15. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

    that looks like an OSHA POSTER ON HOW TO GET PERMENANTLY AND SERIOUSLY INJURED
     

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