Hello HDawood,
Greetings.
EX4300- 48T doesn't support POE functionalities as they have all copper ports. Instead, you can use an EX 4300 48P with a POE budget of 900 W and a Power supply rating of 1100 W AC.
To explore more about EX4300 and its variations refer to the complete datasheet of EX 4300 series switch:
Refer the 7th page of the PDF for seeing the EX4300 variations and their capabilties:
https://www.juniper.net/assets/us/en/local/pdf/datasheets/1000467-en.pdf
I hope this helps. Please mark this post "Accept as solution" if this answers your query.
Kudos are always appreciated!
Best Regards,
Lingabasappa H