See 210.7.Seems odd there's so much emphasis put on handle ties for MWBC yet nothing about this scenario being fed from 2 different circuits from 2 different panels, High and Low Voltage, unless I'm overlooking a requirement somewhere that wouldn't allow it.
JAP>
Agreed, or a contactor.Use 120v lights in the bathroom. Problem solved.
Use 120v lights in the bathroom. Problem solved.
120V Lighting doesn't work out well with 277v designed lighting schemes, and the issue on the table.
JAP>
Why? We do many jobs where both are present and you already have 120v at the switch location. if it is a problem just use a contactor.
Roger
There is almost no code compliant way to do that. First very few two pole switches are listed for use with more than one circuit as required by 404.8(C), and second you have to comply with the common disconnect rule found in 210.7. If you can find a wall switch listed for the application you would also have to provide a line side means of common disconnect.I'm not talking about redesigning the Lighting. I was asking about the legality of using 277v and 120v through a 2p switch on the same yoke like the engineers have drawn it on the plans.
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JAP>
There is almost no code compliant way to do that. First very few two pole switches are listed for use with more than one circuit as required by 404.8(C), and second you have to comply with the common disconnect rule found in 210.7. If you can find a wall switch listed for the application you would also have to provide a line side means of common disconnect.
And you were given numerous reasons why the engineers design was not code compliant.I'm not talking about redesigning the Lighting. I was asking about the legality of using 277v and 120v through a 2p switch on the same yoke like the engineers have drawn it on the plans.
But you seem to think it's a problem by this statement.It doesn't take a genius to figure out how to switch a 120v exhaust fan from 277v lighting, that's not what the question was.
And you didn't answer the question as to why you think that's the case120V Lighting doesn't work out well with 277v designed lighting schemes, and the issue on the table.
What makes you think designers don't make mistakes?If I pick up a set of print that shows the circuitry for a certain area being fed off of a circuit out of a 277v panel, it should be that way.
Which brings us back to the contactor for one solution.The lighting scheme should not have been changed to 120v just because someone didn't know how to control a 120v exhaust fan from a 277v circuit.
[/QUOTE]And you were given numerous reasons why the engineers design was not code compliant.
But you seem to think it's a problem by this statement.
And you didn't answer the question as to why you think that's the case
What makes you think designers don't make mistakes?
Which brings us back to the contactor for one solution.
Now, what is your actual question?
JAP>
[/QUOTE]And you were given numerous reasons why the engineers design was not code compliant.
But you seem to think it's a problem by this statement.
And you didn't answer the question as to why you think that's the case
What makes you think designers don't make mistakes?
Which brings us back to the contactor for one solution.
Now, what is your actual question?
JAP>