I need some #12 wire rated 125 degrees centigrade to use as supply conductors for inground Hadco 175 watt MH uplights for lighting a flagpole.They need to be rated for wet location for the inground application.

What should I ask for at the suppy house?

I also need to feed some MH wall floods by Hubbell with the same temp. rated wire.

What wire do I need?

Is this something new in the industry. I would use 90C wire in the past to feed these fixtures...

shortcircuit

Try Appliance Lead Wire but you may be at an appliance parts counter to get it ... at least in small quantities.

You can probably transition to THWN as soon as you get out of the light can.

Look here http://www.generalcable.com/NR/rdonlyres/C85E061B-E536-44F2-8F1E-0724F1296021/0/PolyradUltra600VSingleConductor125CPage8.pdf#search=%22conductors%20rated%20125C%22

Try Grainger, or an electronics supply store.

Thanks for the feedback...I only need about 300ft of black, white and green. It has to be suitable for wet locations because it is in PVC in ground...

shortcircuit

The only insulation I can think of that might meet your needs is made of teflon. When I last used it - 20+ years ago- it was only available in a pale greenish color.

310.13 lists several 250c conductors

The only conductor 125C or above that I see in 310.13 for wet locations is MI for special applications...

Bob..I don't believe that cable is acceptable for use in this application.?