I am an E.E. working on the lighting drawing for the conversion of a warehouse into an office building. Typically for an office building I would spec out 120 VAC lighting that would be fed from either a 208/120 incoming line from the power company or use a transformer to convert the 480 incoming line to 208/120 for the lighting.
I have a client that has specified that the flourescent lighting is to be 277 VAC rather than 120 VAC. I don't necessarily feel that this is the best option for office space but that's what is specified.
My question is that although I am familiar with lighting contactors to control the 277 volt lighting is it normal to power up the 277 lighting in the same manner as with 120 VAC other than making sure all switches are rated fo 277 rather than just 120V. I don't think I really need lighting contactors based on the number of luminaires and the respective load but I have never seen an actual design where 277 VAC is distributed through wall mounted light switches just like 120VAC would be. I am sure it can be done but is there anything in the code that I need to be aware of and is this considered a normal way to wire up 277 VAc luminaires. All the designs I have seen before used lighting contactors for 480 or 277 VAC power wiring to the lights Thanks