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  1. Replies
    17$$
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    The State of MI, Michigan MTW Ω

    The State of MI, Michigan

    MTW Ω
  2. Replies
    4$$
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    328

    I think the type of work you do determines the...

    I think the type of work you do determines the best choice for you.

    The T5 only goes up to 100A, you said you wanted 200A

    My preference is to use a closed clamp like the 323. I value the...
  3. Pointers on the grounding and bonding...

    Pointers on the grounding and bonding connections.

    Your red bonding jumpers on the drawing should be removed. For the transformer input coils, they should be provided a equipment grounding...
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    4$$
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    408

    WiFi Extender

    You might want to look at an Outdoor rated Access Point. Can be installed on the house and cover more than your yard.

    Uses POE power over Ethernet, so no 120V line required. Wall wart powered...
  5. Be careful who you purchase new LED fixtures...

    Be careful who you purchase new LED fixtures from. 20 Years might be a bit of a stretch.

    https://www.freep.com/story/news/local/michigan/detroit/2019/05/07/detroit-streetlights-led/1134222001/
    ...
  6. Is it possible to install your 2nd 600V...

    Is it possible to install your 2nd 600V transmitter feed, from the point of the first 600V step up transformer?
    And eliminate the 2nd step up transformer.

    Looks as if your starting branch circuit...
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    3$$
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    398

    Swing Jack Bulldog Bus Plug

    Swing jack, bus plugs are not compliant for new installs, because they are not capable of being operated from the floor. An older plant that still has these types, can continue to use them, on their...
  8. Thread: High leg delta?

    by MTW
    Replies
    9$$
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    591

    I concur with Kwire, you don't want to use corner...

    I concur with Kwire, you don't want to use corner grounded. Most drives will not tolerate for that very long.

    I would suggest that you use a 3Φ Wye autotransformer. Smaller, less cost, more...
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    21$$
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    833

    You can't use a boost transformer, to go from...

    You can't use a boost transformer, to go from 208/120V 3W to 240/120V 3W.

    The voltages will not be correct or symmetrical.

    You need to use a isolation type unit. 208V 2W Primary to 120/240V 3W...
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    11$$
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    693

    Bill, the combustion blower on my oil fired steam...

    Bill, the combustion blower on my oil fired steam cleaner, includes, attached to the blower shaft, a tiny oil pump, calls for 12A @120V.
    Ignition transformer is 240VA @120V.

    Likely you need a...
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    16$$
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    838

    Have a look HERE...

    Have a look HERE, make sure your panel clears the restriction list.

    And be prepared to give up four spaces.

    MTW Ω
  12. Thread: 208Y buck-boost

    by MTW
    Replies
    101$$
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    3,071

    Single phase four winding transformers can be...

    Single phase four winding transformers can be very versatile, when you learn how to apply them in banks.

    My shop has a 240/120V 4W 3Φ open delta service. I test and service customer equipment and...
  13. Thread: 208Y buck-boost

    by MTW
    Replies
    101$$
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    3,071

    That is the correct percentage (125%) for a...

    That is the correct percentage (125%) for a autotransformer primary protection. It was late and I didn't take time to look. Used from memory the 250% limit on isolation models, with primary and...
  14. Thread: 208Y buck-boost

    by MTW
    Replies
    101$$
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    3,071

    Well, yes. I just used the [D] calculator, that...

    Well, yes. I just used the [D] calculator, that he picked, to keep it same same.

    I did include one in post #27

    I liked the old Acme catalog, for lessons on buck boost setups, but didn't find it...
  15. Thread: 208Y buck-boost

    by MTW
    Replies
    101$$
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    3,071

    For protection of the transformer bank input....

    For protection of the transformer bank input. 26.59A @208V, 26.59 x 1.25= 33.24A Lowest over current protection device, for full input capacity.

    So you would need a 35 or 40A fuse, on the input....
  16. Thread: 208Y buck-boost

    by MTW
    Replies
    101$$
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    3,071

    [D] calculator

    Here is the [D] calculator screenshot, the forum character limit, clipped it from the last post.


    22832
  17. Thread: 208Y buck-boost

    by MTW
    Replies
    101$$
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    3,071

    3Φ 3W 208 to 240V Boost Transformer Setup

    So to follow on that point, for a demonstration.

    From the chosen Square [D]etroit calculator

    Using the correct voltage and bank type, gives a different answer.

    Instructions:
    ...
  18. Thread: 208Y buck-boost

    by MTW
    Replies
    101$$
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    3,071

    Here is the tag on the above shown units. ...

    Here is the tag on the above shown units.

    22826

    MTW Ω
  19. Thread: 208Y buck-boost

    by MTW
    Replies
    101$$
    Views
    3,071

    208 to 240V Boost Transformer Setup

    To get 240V 3Φ 3W from 208Y 4W, you only need 2 transformers. The system ground from the 208Y, would ground the 2 transformer cases, and pass on through, to the load connection. This is standard for...
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    40$$
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    For the history buffs, 1881 to 1918...

    For the history buffs, 1881 to 1918.

    It's one zip folder 452MB. Will be up for a couple weeks, then removed to reclaim my space.

    Got any others to share, using this method?
  21. Replies
    15$$
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    716

    Looks to me that it was rewound as a standard...

    Looks to me that it was rewound as a standard nine lead dual voltage voltage 60Hz motor. A second block was added to for the extra leads, and half the posts cut off to make clearance. Appears to be...
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    21$$
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    942

    I don't have access to International Mechanical...

    I don't have access to International Mechanical Code (IMC) 507 to look for myself what the temperature rating should be and it's why I'm asking.

    But looking at the manual for the Hooddepot On...
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    21$$
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    100F in the duct throat sounds sensitive enough,...

    100F in the duct throat sounds sensitive enough, but the cut sheet linked to earlier starts at 140F min. That's why I asked whats working for him, placement and temp rating.

    Going on memory, the...
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    21$$
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    Fenwal Detect A Fire

    I have used them many times. But never heard them called a "finger detector" before.

    22685

    Mounted inside the duct, up a foot I could see that as a good placement for use as an initiating...
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    21$$
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    942

    What type heat detector does your contractor...

    What type heat detector does your contractor supply, a fixed temp or a rate of rise detector. And do they supply multiple multiples for a long hood?

    MTW
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