motor operated appliance NOT mark overcurrent protection anywhere

[kwired]

I agree. They are just motor circuits, not appliances.

It would be an appliance if it had a motor and another load in it

Go read art 100 definition of appliance. It doesn't have to be a motor and another load. It doesn't necessarily need to have a motor.

There are many similar items out there that fit definition of appliance that only have single motor as the main power unit that maybe don't have a nameplate other than the motor nameplate. IMO art 430 is your only choice when that happens. Based on that OP needs 14 AWG minimum to the 1 HP motors and 12 AWG to the 1.5 HP. I'd bet majority of time 20 amp breakers will hold starting the 1 HP motors particularly if PSC motors, capacitor start maybe not, but NEC will allow up to a 40 or up to a 50 on the 1.5 HP if needed to start those motors.

If I have any design decision involved I'd connect them to 240 volts if motors are capable of that, and I'd bet at least the 1.5HP is, but probably the others as well.

 

[hhsting]

I don’t see how some of you are saying equipments in question are not appliances.

Definition of appliance NEC 2014 section 100:


An appliance is defined in Article 100 as utilization equipment, generally other than industrial, that is normally built in standardized sizes or types and is installed or connected as a unit to perform one or more functions, such as clothes washing, air conditioning, food mixing, deep frying, and so forth.


Make up air uint/Supply fan is a unit its function is to bring air from outside inside and sometimes make air hot or cold before it goes inside. MAU is built lot of standardized sizes no?

Exhaust fans (EF-1,EF-2) are unit its function to take air out. Exhaust fans are built lot if standardized sizes and shapes.


How are all of you not seeing this is NOT appliance?

 

[augie47]

If it is an appliance it will likely have a NRTL (UL) listing identifying it as such and would need a nameplate..
It sounds more like a typical commercial cooking hood application with three separate motors.
These are usually supplied by 3 individual circuits which you can calculate from Art 430 as you have the horsepower OR they are supplied from one controller requiring 1 or more circuits.
As a plan review person you have little choice other than going back to the designer or to equipment specifications.
I fail to understand how you get involved in these circuses... you are reviewing plans.. the architect or designer should have indicated if they wanted 3 circuits or one. If they indicate three, you can verify the circuitry from Art 430 if you wish to. If the designer shows one circuit then you need more info on the controller.

 

[hhsting]

If it is an appliance it will likely have a NRTL (UL) listing identifying it as such and would need a nameplate..
It sounds more like a typical commercial cooking hood application with three separate motors.
These are usually supplied by 3 individual circuits which you can calculate from Art 430 as you have the horsepower OR they are supplied from one controller requiring 1 or more circuits.
As a plan review person you have little choice other than going back to the designer or to equipment specifications.
I fail to understand how you get involved in these circuses... you are reviewing plans.. the architect or designer should have indicated if they wanted 3 circuits or one. If they indicate three, you can verify the circuitry from Art 430 if you wish to. If the designer shows one circuit then you need more info on the controller.

commercial hood application but equipments fit definition of appliance 422??. Three seperate unit motors each unit. Where did 430 got involved? Another version of same Post #1 question

Panel schedule shows three separate circuits from the panelboard. So EF-1 circuit #1 breaker #1,EF-2circuit#2 breaker #2, SF-1 circuit#3 breaker#3 in the panelboard

 

[Greentagger]

 

[kwired]

If it is an appliance it will likely have a NRTL (UL) listing identifying it as such and would need a nameplate..
It sounds more like a typical commercial cooking hood application with three separate motors.
These are usually supplied by 3 individual circuits which you can calculate from Art 430 as you have the horsepower OR they are supplied from one controller requiring 1 or more circuits.
As a plan review person you have little choice other than going back to the designer or to equipment specifications.
I fail to understand how you get involved in these circuses... you are reviewing plans.. the architect or designer should have indicated if they wanted 3 circuits or one. If they indicate three, you can verify the circuitry from Art 430 if you wish to. If the designer shows one circuit then you need more info on the controller.

It still fits in the pretty vague definition in art 100. May not be a listed appliance but still fits the definition. If listed probably will have a nameplate for the entire unit and not just the motor.

A lot of hoods are custom made. The exhaust fan is often a separate component though together along with a custom fitted duct between them, they sort of make up a single system for a single purpose.

 

[RRJ]

...the OP states there is no name plate

These are not appliances! You take your information off the motors. THE NAME PLATE IS ON EACH MOTOR.

You just listed all you need to know anyway.

1. Rooftop Kitchen make up air unit (supply fan SF-1) 120V, single phase, 60Hz, 1.5HP

2. Rooftop Kitchen exhaust fan EF-1 for Fryer hood 120V, single phase, 60Hz, 1 HP

3. Rooftop Kitchen exhaust fan EF-2 for Griddle hood 120V, single phase, 60 Hz, 1 Hp

Now go to T430.248 and look up the full load currents for each fan. Only additional thing you need to find out is whether each motor is internally overload protected (I strongly suspect these 120V motors are) and if not you will need to supply a starter.

-Hal

This will be the route to go to, if you do not have markings in the equipment telling you what ocpd to use. Also OP should try looking for specs online to see if there is manufacture’s instructions for equipment.


Sent from my iPhone using Tapatalk

 

[hhsting]

Designer is saying that manufacturer does not provide mocp, mca in the USA

Would following be sufficient?: designer would need to provide a note on plans that manufacturer do not provide mocp, mca and that they are sizing breaker based on 430 and provide calculation based on 430 for breaker?

 

[augie47]

That's your decision. Designer shows 3 motor circuits.. Controlling etc will eventually be determined in the field.
As a plan review person, note what you wish. You have a panel schedule and the 3 motors loads.