240 high bay lights to LED. No neutral needed ?

[Stevenfyeager]

Question from one who doesn’t do much commercial work: Replacing High bay 400 MH light fixtures with new LED fixtures, the new fixture says 120-277 v. But it’s wiring diagram shows L and N. ( and ground). My circuit has no neutral. My question, no neutral needed ? Two 120 v hots only ? Thank you !

 

[LarryFine]

Ignore the N designation. Wire line to line.

 

[Stevenfyeager]

Thanks! Some lights have 120-277 v and some have 120/277 v. Any difference in these two notations ?

 

[LarryFine]

Thanks! Some lights have 120-277 v and some have 120/277 v. Any difference in these two notations ?

In my opinion, they mean the same thing: a voltage range, not either/or.

 

[winnie]

IMHO: LarryFine is very likely correct on both counts, however only the manufacturer will know for certain.

The system _may_ be designed to function at either of two voltages and only over a small range near those two voltages. This might be the case if they were designed to work with line voltage dimming.

Additionally the system _may_ be designed to require one of the supply leads be a grounded conductor.

However given the 'universal' nature of power supplies these days (and an LED driver is a power supply) I suspect that your fixtures are agnostic about L-L vs L-N and will be happy with any voltage in their rated range.

-Jon

 

[Little Bill]

In my opinion, they mean the same thing: a voltage range, not either/or.

IMHO: LarryFine is very likely correct on both counts, however only the manufacturer will know for certain.

The system _may_ be designed to function at either of two voltages and only over a small range near those two voltages. This might be the case if they were designed to work with line voltage dimming.

Additionally the system _may_ be designed to require one of the supply leads be a grounded conductor.

However given the 'universal' nature of power supplies these days (and an LED driver is a power supply) I suspect that your fixtures are agnostic about L-L vs L-N and will be happy with any voltage in their rated range.

-Jon

I'm not saying exactly what the OP's lights require but usually the designation 120V-277V is a range between the two voltages and 120V/277V is one or the other.