Wiring T5HO Ballast for 240 volt

[gt1guy]

I have 40 T5 fixtures I'm putting up in my shop. Each fixture has 4 bulbs. Shop is 80'x50', detached and has it's own service. Plan is 4 rows (banks) of 10 fixtures with each row controlled by it's own switch and breaker.

Due to the length of the longest runs (190'+) I want to use 240v to power them. My calcs for using 240v put me at 9 amps per row, 120v put me at 18 amps which I believe is too much for a 20 amp lighting circuit. 80% of 20 amps is 16 amps.

The fixtures I have use the Philips Advance Centium ICN-4S54-90C-2LS-G ballast that are 120v-277v. Problem is, looking at the wiring diagram on the ballast, I get no clue as to how to wire them up.

Here's a picture of the wiring diagram. And I do want 4 lamps on.

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On the ballast it also says, "Green terminal or ballast case must be grounded". The ballast case wedges into a slot in the fixture which has a green grounding screw.

Can some one explain to me how this ballast should be wired for 240v?

I do have 2 pole switches and breakers for each bank.

Thanks for any help,
Kevin

 

[rockwithjason]

they use switching power supplies that don't wire differently for different voltage levels. you wire them the same way for all voltages within their ratings.

 

[Norcal]

If your shop is attached to a residence, you cannot use anything over 120 volts. Separate structure on residential property then that would be a judgement call. To answer your question just apply 240V to a 120-277V ballast, they work on any voltage in that range.

 

[gt1guy]

Shop is a separate detached structure.

So according to the wiring diagram, I would connect one hot leg to the black, the other hot leg to the grey/red. It's the white connection that confusing me. Would that be a ground? The color tells me neutral but that doesn't sound right.

 

[Movover]

White and black are your input voltage up to 277 volt, the gray/red is a switch wire that enables all 4 lamps , so that needs to be connected to any hot or neutral to have all 4 lamps on

 

[gt1guy]

White and black are your input voltage up to 277 volt, the gray/red is a switch wire that enables all 4 lamps , so that needs to be connected to any hot or neutral to have all 4 lamps on

Ok. Thank you.

So with my white and black wires being fed 120v each for 240v, there is no neutral used?

The disconnecting plug at the end of the ballast wiring appears to be set up to jump off one of the hot legs.

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Would this second picture be an accepted way to do this?

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Thanks

 

[rockwithjason]

its hard to see but yes I think that will do

 

[Norcal]

208, and 24,0 volts do not have a neutral, 120, and 277, volts do.

 

[gt1guy]

Thanks guys.