What is the Three letters on compressor terminal blocks are?
The three letters commonly found on compressor terminal blocks are "R," "S," and "T." These letters represent the different phases in a three-phase motor system, with "R" indicating the first phase, "S" the second phase, and "T" the third phase. In single-phase applications, you might see terminals labeled as "L" for line and "N" for neutral instead. Proper connection to these terminals is essential for the correct operation of the compressor.