For the current week, the overall ratings of five Electrical Equipment stocks are worse, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Sensata Technologies’ (NYSE:ST) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. Sensata Technologies Holding develops, manufactures, and sells sensors and controls. For Portfolio Grader’s specific subcategory of Earnings Momentum, ST also gets an F. The stock currently has a trailing PE Ratio of 37.10. For a full analysis of ST stock, visit Portfolio Grader.

Thermon Group Holdings’ (NYSE:THR) rating weakens this week, dropping to a D versus last week’s C. Thermon Group Holdings provides engineered thermal solutions for process industries. The stock gets F’s in Earnings Momentum and Earnings Surprise. For more information, get Portfolio Grader’s complete analysis of THR stock.

The rating of FuelCell Energy (NASDAQ:FCEL) slips from a C to a D. Fuelcell Energy develops and commercializes fuel cell power plants for electric power generation. The stock gets F’s in Earnings Revisions, Equity, and Cash Flow. To get an in-depth look at FCEL, get Portfolio Grader’s complete analysis of FCEL stock.

This week, Polypore International (NYSE:PPO) drops from a C to a D rating. Polypore International develops, manufactures, and markets specialized polymer-based membranes used in separation and filtration processes. The stock gets F’s in Earnings Revisions and Earnings Surprise. As of June 28, 2013, 25.6% of outstanding Polypore International shares were held short. The trailing PE Ratio for the stock is 30.50. For more information, get Portfolio Grader’s complete analysis of PPO stock.

This is a rough week for Brady Corp. (NYSE:BRC). The company’s rating falls to D from the previous week’s C. Brady Corporation makes and markets identification solutions and products that identify and protect premises, products, and people. The stock gets F’s in Earnings Surprise and Margin Growth. The stock price has fallen 8.5% over the past month, worse than the 1.7% decrease the S&P 500 has seen over the same period of time. For a full analysis of BRC stock, visit Portfolio Grader.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.