240 volt Lighting

[blues]

I am being told light fixtures rated for 120-277V can also operate at 240V, single phase 2-Hots? Is that correct? I am getting conflicting info.

Dan Craven

 

[ptonsparky]

I've always done it that way, but a three year old thread that was recently closed suggested otherwise. A lot has changed in those three years.

 

[mbrooke]

There is this thread which made me think differently. But its closed

https://forums.mikeholt.com/threads...st-not-meant-to-be-used-on-208-or-240.137807/

 

[brantmacga]

Wut?

Seems like they should label “120/277” instead of “120-277” then.

Never knew this.


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[mbrooke]

Wut?

Seems like they should label “120/277” instead of “120-277” then.

Never knew this.


Sent from my iPhone using Tapatalk

But then that would mean it can't be used on 230 L-N systems. Better a note saying "one leg must be referenced to earth potential"

 

[electrofelon]

I wonder if the product standards say anything about the wire color for the power leads? When the label says "120-277" I recall one lead being white - does that mean it must be a grounded conductor or not necessarily?

 

[ActionDave]

Well the link to the other thread was about electronic, fluorescent ballasts. Old school HID ballasts could definitely be hooked up 240V but nobody uses those anymore. We need to know more about the OPs lights before a real answer can be given.

 

[mbrooke]

Well the link to the other thread was about electronic, fluorescent ballasts. Old school HID ballasts could definitely be hooked up 240V but nobody uses those anymore. We need to know more about the OPs lights before a real answer can be given.

120-277 would be electronic, 120/277 and 120/208/240/277 would be magnetic multi tap.