A model 13. They have lots of those in Denver by Xcel energy. Most likely installed the same time the Model 25's were installed. ANd I would probably say this is 120 volt cause all the lights I found on the ground used by Xcel were wired for 120 volt.
I wasn't sure if these are Xcel's or the college's since they're over the parking lot (the ones over the streets in there also have metal poles where these are on wood).
I know for a fact that the lighting *inside* the building is 277v .. but on the parking lot/streetlights... I have no idea, could be either LOL
@joe_347V Interesting, I didn't know they used those higher voltages for street-lighting, although it makes sense since it'd be less amps.
@LilCinnamon I looked at this one again a couple days ago .. yep I think you're right that its probably Xcel's since its wired to some others on the streets (overhead wires)
@Joseph, Well those B2213s at the salvage yard where 600 volt and they where used in a parking lot. My Spaulding-Whiteway sports lighter is also 600 volts.
600v?! What do the ballasts and the terminal blocks look like in these 600v fixtures? Circuits of 600v and higher requires a different set of safety measures than lower voltages.
According to the Canadian Electrical Code, 600V is the upper limit of the "low voltage" category. Above 600V you need special equipment for mid-voltage.
I guess the terminal block is bigger to provide a better insulation. The ballast itself must be a CWI, to provide electrical insulation of the secondary part. I have myself a CWA ballast for 347V, it'd be illegal on a new installation today!
I read on the Advance site that Canadian ballasts that are fed with two hots such as 208, 240, 600v must be a CWI. My 120/240v HPS ballast is a CWI but I have some 120/208/240/277v 70w MH ballasts that are not CWI.
I didn't know that 347v HID ballasts needed to be CWI though, I have a lot of older CWA ballasts that also have a tap for 347v. Now I wonder if 347v fluorescent ballasts are differently designed.
I do know there's a voltage limit for autotransformer type ballasts, although I'm not 100% sure of the exact limit. Maybe they're still allowed for replacement, I should check if OEM versions are available.
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I know for a fact that the lighting *inside* the building is 277v .. but on the parking lot/streetlights... I have no idea, could be either LOL
I''m not sure if they made 600v parking lot lights though.
@LilCinnamon I looked at this one again a couple days ago .. yep I think you're right that its probably Xcel's since its wired to some others on the streets (overhead wires)
I guess the terminal block is bigger to provide a better insulation. The ballast itself must be a CWI, to provide electrical insulation of the secondary part. I have myself a CWA ballast for 347V, it'd be illegal on a new installation today!
I didn't know that 347v HID ballasts needed to be CWI though, I have a lot of older CWA ballasts that also have a tap for 347v. Now I wonder if 347v fluorescent ballasts are differently designed.