π Key Concepts
β’ Use the chart to match each requirement (starter vs contactor, NEMA vs IEC, reversing, enclosure type, mounting, amps, overload type, coil voltage) to a specific character position in the catalog number.
β’ For the overload relay, note the difference between OLR Type = 9 (C440 electronic) and the C440 OLR designation 5E vs 5G (standard vs ground-fault feature set).
β’ Find the coil suffix that corresponds to 24 VAC / 60 Hz, and the mounting option that corresponds to vertical, then see where those letters/digits appear in each choice.
π Think About
β’ First, which letter in the first two positions must appear if the device is a NEMA starter, not an IEC unit or a contactor? Eliminate any choices that donβt match.
β’ From the OLR section: which digit gives you a C440 electronic overload, and which two-character code (5E or 5G) gives you the ground fault feature set? Which options in the list actually show both of those together?
β’ Look at the AC coil suffix table: which single letter is used for 24 VAC/60 Hz, and at what position in the catalog string does that suffix appear? Do all of the remaining choices have that letter in the correct place?
β’ For the 45 A requirement, which NEMA size/FLA range code (the last three digits) covers up to 45 A, and do all remaining answers use that correct ending? Also check that the enclosure code is open (N) and the mounting code indicates vertical (V).
β
Before You Answer
β’ Confirm that the second character is N (NEMA standard) and the first character is A (starter), not a contactor or IEC unit.
β’ Verify that the overload section shows OLR Type = 9 (C440 electronic) and C440 OLR designation = 5G (ground fault feature set), not 5E.
β’ Check that the catalog number includes the correct coil suffix for 24 VAC/60 Hz, the correct vertical mounting code, an open enclosure code (N), and an FLA range code that matches up to 45 A.