If you leave home after making wudhu and you remain in the state of wudhu until Thuhur time, you can pray it without making another wudhu.

But if you nullified your wudhu, you have to make a new one in order to pray and you have to wash your feet as it is part of the pillars of wudhu.

I am a working woman. I need to pray Zohar at my work place. My question is that if I start from my house in the morning by making wudu is it ok if I do full wudu except washing my feet for my Zohar prayer?