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Thread: 5 ton AC

  1. #1
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    5 ton AC

    What are the electrical specs on a 5 ton AC?
    Is there a table in the N.E.C that might help me convert to Amps, and explain d:confused, disconnect sizing, breaker sizing, conductor sizing, fuse sizing etc? :confused:

  2. #2
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    Quote Originally Posted by juz73
    What are the electrical specs on a 5 ton AC?
    Is there a table in the N.E.C that might help me convert to Amps,
    No, but there are some members here that have ways of getting close enough for estimates.

    As far as disconnect sizing, breaker sizing, conductor sizing, fuse sizing etc you will have to see the units specifications or label, no way around that.

  3. #3
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    Lable on the unit usually gives you what you need

  4. #4

    5 ton AC

    Some people say ,convert to BTUH ,then to KW then divide by COP which may be 2 to 3 (to be obtained from manufacturer). The result will give you rough estimation of Elect power consumed. But I am not sure. See if someone can confirm this guideline.

    gk

  5. #5
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    8900 va roughly
    Some people are like slinkies. They serve absolutely no useful purpose. But still put a smile on your face when pushed down a flight of stairs.

  6. #6
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    Rule of thumb for single phase is 10 amps per ton. For an example of a 4 ton calculation, click here.

    As the others have said, the name plate tells you what you need to know. Install your wire sized for the minimum amps and your OCP for the maximum amps.
    My son is one of the Few, the Proud, the Infidel.
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  7. #7
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    1 Ton (air cond.) = 12,000 Btu/hr and 1 kW = 3,412 Btu/hr
    so you can get: 1 Ton (air cond.) = 12,000 Btu/hr / (1 kW / 3,412 Btu/hr) = 3.52 kW

    If you have the EER (Btu/hr-watt): kW/ton = 12 / EER

  8. #8
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    TH's way:

    1.25 HP per ton for 1/2-5 ton capacity
    1.1 HP per ton for 5-50 ton capacity
    1.0 HP per ton for capacity above 50 tons

  9. #9
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    HP-capacity

    Quote Originally Posted by brantmacga
    TH's way:

    1.25 HP per ton for 1/2-5 ton capacity
    1.1 HP per ton for 5-50 ton capacity
    1.0 HP per ton for capacity above 50 tons
    Does this apply to different types of compressors and their efficiencies...such as scrolled vs. piston? Just curious. rbj
    rbj, Seattle...Safety is a Professional Courtesy.

  10. #10
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    Quote Originally Posted by gndrod
    Does this apply to different types of compressors and their efficiencies...such as scrolled vs. piston? Just curious. rbj
    it doesn't say. that's all the info given. I haven't used that table before; i've always been able to get the nameplate specs ahead of time. I'm sure you can e-mail tom and ask him.

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