Using the illustrated catalog number...

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Question 1 of 205eccefa4bacbc34ba4d48398

Using the illustrated catalog number selection chart, determine the correct catalog number for a motor starter that meets the following selection criteria: a 3-pole, vertically mounted, NEMA multi-speed starter with an open enclosure rated at 27 continuous amperes, fitted with a bimetallic overload relay and an operating coil rated at 240 VAC/60Hz. See illustration EL-0180.

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🔍 Key Concepts

• Use the Device Type and Standard positions (first two characters) to distinguish between a starter and a contactor and confirm it is NEMA. • Match the required multi‑speed configuration and bimetallic overload relay to the correct two‑ or three‑digit code in the middle of the catalog number. • Use the Contactor Frame Size / Continuous Amperes, Enclosure type, mounting (horizontal vs vertical), and AC coil voltage suffix to filter the final characters.

💭 Think About

• From the chart, which character(s) identify a starter versus a contactor, and which of the answer choices match a NEMA multi‑speed starter rather than a contactor? • Which digit in the middle of the number corresponds to the OLR type, and which value on the chart represents a starter with C306 bimetallic overload relay? • Looking at the right side of the chart, which letter suffix gives an AC coil rated for 240 VAC, 60 Hz, and which choice(s) actually end with that suffix?

✅ Before You Answer

• Verify that the chosen catalog number begins with the correct code for a starter (not a contactor) and NEMA standard. • Confirm that the frame size letter corresponds to 27 continuous amperes and that the enclosure code matches N = open. • Double‑check that the last letters/digits specify vertical mounting (for a starter) and the correct 240 VAC/60 Hz coil suffix, and that no extra suffixes are added that would change the overload relay type to electronic instead of bimetallic.

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