Retapping 120/240 Ballasts

[VoltDolt]

HPS ballasts currently up and running 120v. Ballasts are multi-tap identified 120/208/240.

I would like to have these retapped 240 to decrease amperage because of some heat issues. It appears they need to be 240 single phase? The service is standard 120/240. Anyway to tap these ballasts 240 2 pole?

http://e.imagehost.org/view/0088/holt.gif

Thank You

 

[hillbilly1]

As long as your not in Canada, If I am not mistaken they do not allow the screw shell on the lampholder to be live to ground.

 

[VoltDolt]

Which leads would be used? Feed the lead identified 240 then feed the common with the other leg?

If an energized screw shell isn't an issue.

 

[kbsparky]

Which leads would be used? Feed the lead identified 240 then feed the common with the other leg?....

Yup, you got it. :wink:

 

[alfiesauce]

As long as your not in Canada, If I am not mistaken they do not allow the screw shell on the lampholder to be live to ground.

You are correct Daniel Jackson.

 

[nakulak]

I can't find where it says that the screw shell has to be grounded, can someone point out the section ? I do see a couple of sections that say that the grounded conductor, where provided, must be attached (ex 410.23, 410.47,200.10C) . We routinely use 2 pole to sodiums. check out 210.6 C

 

[VoltDolt]

I can't find where it says that the screw shell has to be grounded, can someone point out the section ? I do see a couple of sections that say that the grounded conductor, where provided, must be attached (ex 410.23, 410.47,200.10C) . We routinely use 2 pole to sodiums. check out 210.6 C

Could you confirm or correct what has been submitted in regard to my schematic?

120 to 240 lead and 120 to common off a 2 pole breaker?

If so, everything else can remain the same? (I'm assuming the ballast out put will be unchanged. No change required to igniter, capacitor or lamp).

Thanks

 

[LarryFine]

Interesting tidbit: If you feed 120v into the 120v tap (with the neutral on the common as usual), you will measure 208v at the 208v tap, and 240v at the 240v tap.

The reverse is also true: feed the proper voltage into any tap, and the other taps will put out their respective voltages, which is why unused taps must be insulated.

 

[hillbilly1]

I can't find where it says that the screw shell has to be grounded, can someone point out the section ? I do see a couple of sections that say that the grounded conductor, where provided, must be attached (ex 410.23, 410.47,200.10C) . We routinely use 2 pole to sodiums. check out 210.6 C

It's a Canadian thing, usually in the paper work with the ballast or multivolt fixtures it says it cannot be used in Canada at those voltages. It's fine to use in the states.

 

[frenchelectrican]

I can't find where it says that the screw shell has to be grounded, can someone point out the section ? I do see a couple of sections that say that the grounded conductor, where provided, must be attached (ex 410.23, 410.47,200.10C) . We routinely use 2 pole to sodiums. check out 210.6 C

Let me fill you in little more as other members fill you in a bit but I will dig it more deeper.

Per CEC { Canada Electrical Code } there is a articale that they will not allowed 208 and 240v to luminaire shell at all due the ballast design {unless it is a isolated ballast then it can be done on this voltage } and they will only allowed 120, 277 and 347 volts for HID luminaire yeah they have 480 and 600 volts but very limited useage on the luminaires.

I can get ahold of my Canadian frenid and get this qoute and paste it here.

Merci,Marc

 

[jrannis]

HPS ballasts currently up and running 120v. Ballasts are multi-tap identified 120/208/240.

I would like to have these retapped 240 to decrease amperage because of some heat issues. It appears they need to be 240 single phase? The service is standard 120/240. Anyway to tap these ballasts 240 2 pole?

http://e.imagehost.org/view/0088/holt.gif

Thank You

1. I dont see what the issue is.
2. Disconnect the neutral,
3. Install a new conductor (SOME PEOPLE WOULD JUST REIDENTIFY THE CONDUCTOR)
4. and a 2 pole breaker.
5. Connect the new conductor to the common tap and
6. move the old conductor to the 240 volt tap