Magnetic Motor Starter

These starters are required by code....

You didn't specify single or three-phase...However the starter is for safety, in case the motor overloads for any reason one of the heater coils will melt, effectively avoiding any chance of fire or severe motor damage hopefully... The starter is sized according the specific motor, so you need Brand name, model number ect. The distributor for the motor type you have ,will also supply the starter...be sure to double check the heater sizes, one for each leg...

I will provide a link to a general purpose supply source, just in case...

EE CONTROLS • 3881 DANBURY RD • BREWSTER, NY 10509
PH: 845.278.5777• FX: 845.278.5444• EMAIL: WEB@EECONTROLS.COM

It is single phase. Thanks

Your application is dependent on what codes you have to meet. Country, province/state, and city.

In Canada, the minimum conductors would be sized for 1.25 * 11.5 = 14.4 Amps (or 15 amps).

maximum overcurrent for time delay fuses would be 175% of rated current, max time-limit cb woud be 250% of rated. You can select closest larger standard size.

Since this appears to be an automatic start and unattended you need an O/L device.

Max O/L setting will be 1.15 *11.5 = 13.2 Amps.

This can be in either an independent motor starter, or part of a thermally protected motor.

For a typical design you could use a NEMA 1 (manual or electric) starter with O/L set for 13.2 Amps, Wire sized for 30 AMPS and a 30 AMP F frame CB. Verify CB has short circuit interrupting capacity suitable for the supply capacity. (IF there is a very stiff source you may need current limiting fuses anyways). 30 Amp feed will probably be suitable for voltage drop for length of conductors, but check it anyways.

Over designed but very robust.

To use IEC rated starters fuses would need to be selected to protect the starter also. Check with manufacturer data for IEC starter. I am not fond of IEC contactors and the NEMA rated contactors are very robust in comparison, but more $.

Check all data with a local contractor and be sure to meet all permits and local laws. You may need a certified electrical contractor to install the equipment and an inspection from your hydro supplier or other authority. Done right it is all a formality. It is only for your own protection and safety.