Title: Lab Assignment
Course: HET 111 HVACR Electricity I - Spring 2015 > Section: HET 111 HVACR Electricity I - Spring 2015

Lab Assignment

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Unit 3 Lab

Terminal Identification Lab

An ohmmeter is used to measure the resistance between each set of the three terminals found on a motor.  The resistance between one set of terminals will be higher than the resistance between the other two sets.  The terminal not included in the highest resistance measurement is the common terminal and marked C.

The resistance is next measured between the common terminal and the other two terminals.  The lower resistance from a terminal to common determines the run winding terminal and is marked R.

The indication of higher resistance from a terminal to common determines the start winding terminal and is marked S.

Click on the item below to download the lab document
- Terminal Identification Lab.docx (14.71 KB)