240 volt lights

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domnic

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Electrical Contractor
can i break one leg of a 240 volt lighting circuit with a 120 volt eye?
 
What kind of lighting, and what kind of photocell? Would a 240v PC be available?

You would, in effect, be applying 240 volts across the PC, I don't know if it would not smoke it.
 
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domnic said:
can i break one leg of a 240 volt lighting circuit with a 120 volt eye?
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Yeah you can as long you got netural conductor there.

But how much load you are using on that circuit and do you any chance you got any 120 v luminaires on that circuit as well ?? [ i do see it happend once a while ]

There are few diffrent Photocell rating depending on the load itself.

Merci, Marc
 
You could, but I wouldn't.


Code compliant or not it seems dangerous to me. If you have to break both legs on a manual switch you should have to do the same on a PC.
 
Who says you have to?
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I always assumed you had to.

Are you telling me that you can use a sp switch to control a 240V light?



Great.

You can't use phase tape on #6 or smaller wire but you can leave half the circuit hot in a fixture?
 
220/221 said:
You can't use phase tape on #6 or smaller wire but you can leave half the circuit hot in a fixture?
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It's the code, it doesn't have to make sense. ;)

I was surprised to find that most contactors in A/C units are only one-pole, leaving the unit "half hot" all the time. Since A/Cs are a manufactured product they are not covered by the NEC, and for course the external disconnect is we depend on to make them safe for service, but nonetheless it was an eye-opener.
 
220/221 said:
I always assumed you had to.

Are you telling me that you can use a sp switch to control a 240V light?
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The switch would have to be rated for the voltage of the circuit.Some of the inexpensive switches are only rated for 120 volts.
Rick
 
When a purchase a 240 luminaire, with a built in PE, it only breaks one leg of the 240, this is allowed and acceptable as these luminaires are UL listed.
Any many PEs are mult-ivoltage, 120-277
 
What about 410.54(B)?
(B) Switching Where supplied by the ungrounded conductors of a circuit, the switching device of auxiliary equipment shall simultaneously disconnect all conductors.
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electricman2 said:
OK, I give up, what is a switched lampholder?:-?
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There are several varieties, but the one they're likely talking about in that code section are the switched mogul based lampholders for 240V lamps. Pretty much a bygone item.

Seldom will you wire just a "lampholder" anyhow. You'll normally wire a luminaire, and that section doesn't apply to a luminaire.
 
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