Exhaust Fan...

[chevyx92]

Manufactured rooftop exhaust fan for small kitchen hood has a prewired disconnect switch that has the hot and neutral on the switch. I'm suppose to supply 120v to this switch. The switch is a double pole double throw. Is this legal? Why is the neutral on the switch? Is there something that allows this?

 

[infinity]

It is legal and quite common on HVAC equipment. Typically fan power boxes have a small double pole toggle switch with the exact same setup. Can't say that I know why.

 

[stickboy1375]

Positive its not 240v motor?

 

[chevyx92]

Positive its not 240v motor?

Yes I'm sure its 120V not 240V.

 

[mdshunk]

So just use one pole.

 

[chevyx92]

Does 430.105 justify this setup?

 

[chevyx92]

So just use one pole.

But why would they install a double pole switch when they could install a single pole?

 

[stickboy1375]

Why stock two switches when you can stock one, and only have to teach a monkey 1 thing?

 

[infinity]

Does 430.105 justify this setup?

I don't know if justify is the right word. I would say that 430.105 definitely permits this installation but doesn't shed any light as to why the manufacturer has it set up this way.

 

[chevyx92]

I don't know if justify is the right word. I would say that 430.105 definitely permits this installation but doesn't shed any light as to why the manufacturer has it set up this way.

I guess thats what I was looking for. An article that allowed this setup.

 

[Rewire]

Does 430.105 justify this setup?

correct,two pole switches are standard for exhaust fans can be used 220 or 120

 

[benaround]

It's the same reason they use a single pole contactor on their 240vac

air conditioning equipment.