Bryan,
Here is some information that may be useful, see attached article.
This type of equipment is typically nothing more than capacitors. Here are two manufactures of similar equipment that have a UL Listing that I am aware of;
http://www.kvar.com/1000/Home
http://www.power-save.com/1200.html
Keep in mind that UL does not evaluate or validate any manufacturer?s claims of energy usage reduction or energy cost reduction due to the use of power factor correction equipment. UL evaluates and Lists power factor correction equipment only for the risks of fire, electric shock, or injury to persons. These units are intended to be installed in accordance with ANSI/NFPA 70, "National Electrical Code," you may want to visit Article 460. Specifically section 460.8(A) &(C) require both the conductors and disconnect shall not be less than 135 percent of the rated current of the capacitor. Also 460.12 as it requires that each capacitor shall be provided with a nameplate giving the name of the manufacturer, rated voltage, frequency, kilovar or amperes, number of phases, and, if filled with a combustible liquid, the volume of liquid. Where filled with a nonflammable liquid, the nameplate shall so state. The nameplate shall also indicate whether a capacitor has a discharge device inside the case.
Hope this helps
Jeffrey A. Fecteau CBO, ECO
Lead Regulatory Engineer
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Underwriters Laboratories