ECN Forum Forums General Topics of the Trade General Discussion Area walkway light poles on campus

christy boxes are just inground boxes used for splices, grounding electrodes etc.... just like fiberlites (sp) but rectangular....

Scott, what should I check on the fixture? I'm pretty sure that the walkway fixtures we have do include a capacitor and transformer. How would I incorporate the capacitor you're talking with an inline fuse set-up?
Also, in picking out the fuse you're saying I should double the amperage rating of the
fuse? Thanks.....

Scott,

I thought all HID fixtures came with a capacitor. I know the HID ballast replacement kits I purchase have one.

Menegt,
Place the Capacitor across the Ballast's Line input [277 VAC in] and the "Common".
I'll find out the size to use for 100 watt HPS.

Your fuses should be as close to the rated amperage as possible - with a 50% maximum tolerance.
If the total amperage was 1.0 amps @ 277 VAC, size the fuse at 1.25 amps [low end] or 1.5 amps [highest].
This will cover changes in line current [KVA] if the voltage drops.

Frank,

I never saw any HID ballasts in the last 8 - 10 years that did not include PF correcting Capacitors [new fixtures], however I installed two Hubbell HPS 100 watt fixtures this week and they did not have PF Caps!
There was also an existing 150 watt HPS fixture which also had no PF Cap!
I couldn't believe my eyes!!!
even better was the 4.4 amperes that was rated for the 150 watt HPS at 120 VAC!!!

I'm gonna try to talk my Company into putting PF Caps in these fixtures, just to put my mind at ease
I have an assortment of HID Caps, so no one would need to buy new Caps.

Scott SET

Don,
That was the deal.
I can't use a CSA certified fuseholder here, can I? The problem I've run into was with 277V fixtures, and lack of an UL listing.

CSA is a NRTL in the US.
Look at this site: http://www.osha-slc.gov/dts/otpca/nrtl/nrtlsite.html
Don