Control Catalog

IEC Manual Motor Starters Overview Individual Installation Manual motor starters (UL-508, Part III) are devices that provide a means of controlling (switching on and off) a motor. UL-508 allows a manual motor starter to be applied in individual installa- tions between a branch short circuit protection device (circuit breaker or fuse) and a motor (see Figure 1A). The UL, cUL listing allows Surion starters to be utilized in installa- tions up to 600 volts. Short circuit ratings are listed in the tables on page 6-44. GE’s type MC or CL contactors may be used in series with the motor starter for remote motor operation as shown in Figure 1B. Contactors must not be applied at ratings above their nameplate HP/current ratings.

Section 6

Group Installation Manual motor starters may be applied in group applications per Article 430-53 of the National Electrical Code. Refer to the NEC for specific requirements. Group installations are used when multi- ple loads are tapped off of a single branch short circuit protective device (circuit breaker or fuse). A manual motor starter is placed between the branch disconnect and each motor (see Figure 2A). The UL, cUL listing allows starters to be utilized in installations up to 600 volts. Short circuit ratings are listed in the tables on page 6-44. GE’s type MC or CL contactors may be used in series with the motor starter for remote motor operation (see Figure 2B). Contactors must not be applied at ratings above their nameplate HP/current ratings.

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Figure 1A

Figure 2A

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Figure 1B

Figure 2B

Rev. 4/16 Prices and data subject to change without notice

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