Designer69
Senior Member
as opposed to a non combination motor starter?
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What does it mean; Combination Motor Starter
- Thread starter Designer69
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raberding
Senior Member
- Location
- Dayton, OH
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- Consulting Engineer
combo has integral disco
hillbilly1
Senior Member
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- North Georgia mountains
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- Owner/electrical contractor
The ones I have seen are a combination of a disconnect and motor starter in one enclosure, hence "combination starter"
Designer69
Senior Member
ok cool that's what I thought but got confused when someone said it means a starter that protects a combination of motors, ie- 2 or more on one ckt
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- San Francisco Bay Area, CA, USA
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- Electrical Engineer
Look at the diagram in the beginning of Article 430, Figure 430.1
Everything from the "Supply" to the motor must be in each motor circuit. A "Motor Starter" in just the last two elements before the motor, the controller and the overload protection. A "Combination Motor Starter Starter" incorporates more of the elements above it, typically a fused disconnect (or non-fused if there is dedicated up-stream protection) or circuit breaker, along with the provisions to lock it out.
If you don't use a Combo, you have to have locking provisions on whatever your OCPD is for that circuit, and you must also have lockout provisions "within sight" of the motor (with lots of exceptions of course). Using a Combo starter cuts down on the interconnection of those separate elements.
Everything from the "Supply" to the motor must be in each motor circuit. A "Motor Starter" in just the last two elements before the motor, the controller and the overload protection. A "Combination Motor Starter Starter" incorporates more of the elements above it, typically a fused disconnect (or non-fused if there is dedicated up-stream protection) or circuit breaker, along with the provisions to lock it out.
If you don't use a Combo, you have to have locking provisions on whatever your OCPD is for that circuit, and you must also have lockout provisions "within sight" of the motor (with lots of exceptions of course). Using a Combo starter cuts down on the interconnection of those separate elements.
- Location
- San Francisco Bay Area, CA, USA
- Occupation
- Electrical Engineer
That would be called a "Grouped Motor Controller" or "Group-fused" control panel. The same circuit elements still need to be in each motor circuit, but you can get away with combining some of the more expensive parts.
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