What is a ducter tester?

Can fused feeders for the line side of a transformer pass through the same gutter with the load side of the same transformer? I have electric baseboard heat and my air quality is awful. Dust gets in and stays in. Please HELP me with a solution. How do you get air circulation with electric heat? Would you recommend using a 50 hp induction motor to drive a 10hp load Explain your answer? How do you calculate KVAR from micro farads? Why is a switch made of insulating material class 7? What is the current flowing through the first device of a circuit when the first device has a resistance of 12 ohms and the 2nd device has a resistance of 4 ohms circuit voltage is 40 volts.? DC carrying capacity of 50 sq mm copper cable? You ran power from your house to your shop about a year ago The problem you are having is one of the bus legs in your shop panel box is not hot so every other 20 amp breaker is not hot on that leg? What is the value of a 4-band resistor with yellow violet orange and silver as the bands? What is the maximum torque than an induction motor can develop known as? What will happen to the transformer if rated voltage is applied to the winding during short circuit test? Who invented the electromagnetic induction? How do you find unknown value of a resistor when two resistor values and voltage are known in a series circuit? How do you you cover exposed motor windings? How do you test a transistor using cathode ray oscilloscope? What is the time constant of a .05 microfarad capacitor and a 200 kilo ohm resistor connected in series? Does DCEP require a larger diameter electrode when GTAW? A signal has a fundamental frequency of 1000HZ What is its period? Why AC is generated instead of DC? What are the 5 most common cayses of electrical fires?