Page 13 of 21 FirstFirst ... 391011121314151617 ... LastLast
Results 121 to 130 of 207

Thread: Preparing for your Model S: Selecting outlet, Solar City, etc.

  1. #121
    Model S 85KW, VIN #2236
    Join Date
    Aug 2012
    Location
    San Jose, CA
    Posts
    343
    I live in the SF Bay Area and like many folks here, put stuff in the garage and park outside. Solar City is recommending a 14-50 outlet in an outdoor receptacle which seems reasonable to me. RV's hook up outside and get rained on all the time.

  2. #122
    Member xhawk101's Avatar
    Join Date
    Apr 2012
    Location
    Saint Petersburg, Florida, United States
    Posts
    803
    Installed my 6-50 plug on 8awg wire and 50 amp breaker in my garage yesterday. Circuit has been set up for years on an extra dryer which I don't need.

    Well I noticed my kitchen oven light blinking and sure enough the dryer line and oven are on the SAME BREAKER not on same wire though.

    I understand the breaker may trip if I bake and charge at same time. But its not a fire risk to my knowledge.

    My box is full and would need a new sub panel to ad separate breakers.


    I am wondering if the s will detect this and cancel charge or limit ampacity?
    Any comments suggestions are welcome.

    from my Samsung galaxy s3

  3. #123
    Member JackA's Avatar
    Join Date
    Jul 2012
    Location
    Orondo, WA
    Posts
    190
    Quote Originally Posted by xhawk101 View Post
    Installed my 6-50 plug on 8awg wire and 50 amp breaker in my garage yesterday. Circuit has been set up for years on an extra dryer which I don't need.

    Well I noticed my kitchen oven light blinking and sure enough the dryer line and oven are on the SAME BREAKER not on same wire though.

    I understand the breaker may trip if I bake and charge at same time. But its not a fire risk to my knowledge.

    My box is full and would need a new sub panel to ad separate breakers.


    I am wondering if the s will detect this and cancel charge or limit ampacity?
    Any comments suggestions are welcome.

    from my Samsung galaxy s3
    I am not an electrician: however, I watched an electrician yesterday as he installed a 100 Amp circuit to our detached garage. I am not visualizing how your oven and new outlet are not "sharing" some wire. The breakers I saw being used yesterday only have one set of connection lugs so the wire from the load center breaker must be split at some point, one to the oven one branch to the new outlet. I was told by the electrician that the ratings are based on one hour continuous use that is why the expected load should be no more than 80% of the rated capacity. This is to reduce the heat build up in the wire and connectors according to him. A few hundred dollars spent with an electrician might be much less costly than a fire loss.
    Last edited by JackA; 2012-11-18 at 10:19 AM. Reason: Error in Statement

  4. #124
    Model S R77 efusco's Avatar
    Join Date
    Mar 2009
    Location
    Nixa, Missouri, United States
    Posts
    2,883
    Blog Entries
    1
    Quote Originally Posted by xhawk101 View Post
    Installed my 6-50 plug on 8awg wire and 50 amp breaker in my garage yesterday. Circuit has been set up for years on an extra dryer which I don't need.

    Well I noticed my kitchen oven light blinking and sure enough the dryer line and oven are on the SAME BREAKER not on same wire though.

    I understand the breaker may trip if I bake and charge at same time. But its not a fire risk to my knowledge.

    My box is full and would need a new sub panel to ad separate breakers.


    I am wondering if the s will detect this and cancel charge or limit ampacity?
    Any comments suggestions are welcome.

    from my Samsung galaxy s3
    I was warned that 8ga wire is not adequate for continuous 40amp draw and actually had my electrician change out to 6ga.
    Evan E. Fusco, MD--Nixa, MO
    Model S R77/VIN-1267-- Black 85kWh (non-perf), Tech, Lacewood trim, tan interior, Sound Studio, Air Suspension, 19" rims, twin chargers, HPWC
    Model X Reservation Sequence # 5966 (for the wife)

  5. #125
    Member xhawk101's Avatar
    Join Date
    Apr 2012
    Location
    Saint Petersburg, Florida, United States
    Posts
    803
    Quote Originally Posted by efusco View Post
    I was warned that 8ga wire is not adequate for continuous 40amp draw and actually had my electrician change out to 6ga.
    I see.. well I guess I better reconsider my setup. Thanks for the advice.

    from my Samsung galaxy s3

  6. #126
    S VIN S1049, X Resv S744
    Join Date
    Jun 2012
    Location
    near STL
    Posts
    3,384
    Quote Originally Posted by efusco View Post
    I was warned that 8ga wire is not adequate for continuous 40amp draw and actually had my electrician change out to 6ga.
    8 AWG can be used when the proper wire is used, all components are rated at 75 deg C or 90 deg C (breaker, wires, conduit, etc.) and you don't have to de-rate (either due to high temp attic runs or packed conduits, etc.) There is no easy guide for this because the NEC deals with different wire types. For example, if you used type NM cable (typical all-in-one black-sheathed Romex multi-wire cable, like 8/2) it isn't good for 50A with #8, but separate wires in conduit or type MC cable is ok. You have to check your wire / cable's ratings and types.

    EDIT: Oh yes, and the length of the circuit. #8 for anything longer than a short garage run should probably be avoided.

    - - - Updated - - -

    Quote Originally Posted by xhawk101 View Post
    Installed my 6-50 plug on 8awg wire and 50 amp breaker in my garage yesterday. Circuit has been set up for years on an extra dryer which I don't need.

    Well I noticed my kitchen oven light blinking and sure enough the dryer line and oven are on the SAME BREAKER not on same wire though.

    I understand the breaker may trip if I bake and charge at same time. But its not a fire risk to my knowledge.

    My box is full and would need a new sub panel to ad separate breakers.
    A few things:

    1. Since you added a new outlet, it must conform to code. An electric dryer and a range/oven may not share the same circuit.
    2. When you say they're on the same breaker but not the same wire, and you installed this breaker, did you attach multiple wires to each screw terminal on the breaker, or are they pigtailed together inside the box? They must be the latter - even if it were legal to share the breaker, you cannot have two wires connected to a breaker screw, to be legal.
    3. What breaker was formerly in the box? Wiring, receptacles / appliance nameplates, and OCP devices (breakers) must be matched. If your oven was a 30A oven on #10 wire it cannot be connected to a 50A breaker.
    4. Given your location, I am assuming that your county / city subscribes to current code and requires inspections. Installing a new breaker and outlet will typically require a permit and inspection. If you didn't do this, selling your house later may create a problem -- in some jurisdictions, it can cause you to have to bring the ENTIRE HOUSE up to code at your expense before you may sell it. You should check with your city hall / county inspector.

    What type of panel do you have? Some panel brands have compact breakers, 2 in one slot. You could combine 4 120V circuits into 2 slots to make room for a new double-pole breaker. Before you do this, you'll probably need to do a load calculation to make sure you're not going to oversubscribe your panel too much, since you're adding such a large load.
    Last edited by FlasherZ; 2012-11-18 at 06:25 PM.

  7. #127
    Burrito Founder brianman's Avatar
    Join Date
    Nov 2011
    Location
    TMC.com
    Posts
    12,010
    Quote Originally Posted by FlasherZ View Post
    Correct. 8 AWG can be used on a 40A circuit, which is good for 32A continuous. 6 AWG should be used on a 50A circuit, which is good for 40A continuous.
    I was looking for a good consumer-friendly table with some web searching. Didn't find one I really like, but this one was interesting...
    American wire gauge - Wikipedia, the free encyclopedia
    The "NEC copper wire ampacity..." column seems to line up with what you're saying.

    Does this imply 1 gauge for wiring to the HPWC?
    Truly Electric Spaceship-Like Adventure ~ Signature Model Spaceship

    PLEASE NOTE: these musings are the copyrighted intellectual property of the author, and are intended as part of a conversation among the Tesla Motors Clubs membership. My words may not be quoted by any third party outside the Tesla Motors Clubs forums, without my expressed consent. Especially the NYT, which is clearly ethically challenged.

  8. #128
    S VIN S1049, X Resv S744
    Join Date
    Jun 2012
    Location
    near STL
    Posts
    3,384
    Quote Originally Posted by brianman View Post
    Does this imply 1 gauge for wiring to the HPWC?
    No. I don't have the HPWC final specs, but I'm assuming based on published information it requires a 100A circuit and wire for an 80A continuous load. Assuming 75 or 90 deg C ratings (and that you don't need de-rating), you're normally looking at #2 wire (115A/130A rating), although #3 would be good enough. It's much harder to find #3. Keep in mind this is for copper wire, usually THHN.

    (#1 is hard to find too, you'd probably have to go up to 1/0 if you needed it.)
    Last edited by FlasherZ; 2012-11-18 at 06:27 PM.

  9. #129
    Burrito Founder brianman's Avatar
    Join Date
    Nov 2011
    Location
    TMC.com
    Posts
    12,010
    Quote Originally Posted by FlasherZ View Post
    I'm assuming based on published information it requires a 100A circuit and wire for an 80A continuous load
    That was my understanding as well.
    Quote Originally Posted by FlasherZ View Post
    Assuming 75 or 90 deg C ratings (and that you don't need de-rating
    What leads to that assumption, as opposed to the 60 deg C?

    Thanks for the info.
    Truly Electric Spaceship-Like Adventure ~ Signature Model Spaceship

    PLEASE NOTE: these musings are the copyrighted intellectual property of the author, and are intended as part of a conversation among the Tesla Motors Clubs membership. My words may not be quoted by any third party outside the Tesla Motors Clubs forums, without my expressed consent. Especially the NYT, which is clearly ethically challenged.

  10. #130
    S VIN S1049, X Resv S744
    Join Date
    Jun 2012
    Location
    near STL
    Posts
    3,384
    Quote Originally Posted by brianman View Post
    That was my understanding as well.

    What leads to that assumption, as opposed to the 60 deg C?

    Thanks for the info.
    Most wiring (especially current-generation individual conductors in conduit), breakers, conduit, and receptacles, etc., are now UL listed at 75 and 90 deg C. The only issue becomes if you have to de-rate because you have tight conduits, or hot attic runs, etc.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Solar City IPO
    By vfx in forum Off Topic
    Replies: 51
    Last Post: 2013-05-17, 05:41 PM
  2. Solar city partnership on Model S page
    By Dan5 in forum Model S
    Replies: 23
    Last Post: 2013-02-20, 12:22 PM
  3. Solar City and non-Solar City areas
    By efusco in forum Charging Standards and Infrastructure
    Replies: 6
    Last Post: 2012-09-17, 12:11 PM
  4. Solar City expanding service areas!
    By efusco in forum Charging Standards and Infrastructure
    Replies: 3
    Last Post: 2012-07-19, 05:10 PM
  5. Solar City EV charging page
    By TEG in forum Energy, Environment, and Policy
    Replies: 5
    Last Post: 2012-02-10, 04:35 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •