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  1. #1
    Join Date
    Nov 2013
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    Am I correctly measuring wattage?

    I use a TED 1000 energy meter to measure wattage on air handlers and condensers. Here is a photo of the set-up at the inverter for the condenser:

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    My question is this- to measure the total watt draw, do I need to measure the draw on both black cables? The condenser came in at 1.5 kW when measuring a single cable, which seems low.

    Thanks guys!

  2. #2
    Join Date
    Oct 2008
    Posts
    932
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    Never used or seen a watt-meter before. However, my quick review of the operator's manual explains how to install the CTs (pg 10). You're at a 208/240v panel, so you need to use two CTs.
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  3. #3
    Join Date
    Feb 2008
    Location
    Western Wa.
    Posts
    318
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    Just one of the black wires
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  4. #4
    Join Date
    Oct 2008
    Posts
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    Quote Originally Posted by buttwheat View Post
    Just one of the black wires
    What he said...and, from what the instruction manual said, the other CT on the red wire. Point the arrows on the CTs in the same direction.
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  5. #5
    Join Date
    Nov 2004
    Posts
    1,297
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    Why

  6. #6
    Join Date
    Nov 2004
    Posts
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    Why not just use the wattage formula?

  7. #7
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,611
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    Looks like a simple amp clamp. Make sure the TED knows it's hooked to a 240v source. AC units average about 1,000W per ton @ 95f outdoor temp. Newer units less, older units more. Cooler temps reduce power draw significantly.
    Want to REALLY save energy? Tighten up the house/ductwork and downsize the HVAC system. Smaller units keep stable temps, dehumidify better, run quieter in addition to using less power.

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