Can I wire my two-speed In-Line Duct Fan to run on High or Low speed?
Yes, but first this warning. NEVER connect the High and Low speed wires together. The motor wiring will burn out in a matter of seconds, permanently destroying the unit. Wire to operate either on High speed or Low speed. Never both. You may use a Single Pole, Double Throw “ON-OFF-ON” toggle, rocker or other switch to wire for High or Low speed operation. This switch must be rated for 125 Volt AC, 10 Amp minimum. Now you can switch your 2-speed Inductor from High to Low speed and have a center OFF position. Connect the supply power to the C (common) terminal, the High speed wire from the motor to the terminal marked 1 and the Low speed wire from the motor to the terminal marked 2. Make sure that the wiring and enclosure for this switch conform to all applicable standards and codes.