I have also dealt with UV Dryers, along with UV Ovens, in several Design-Build Projects (mostly on the "Design" side of the Projects).
The Lamps on a few "Older" UV Dryers were similar to the High Pressure Mercury HID Type Lamps used in 10KW Tanning Beds (Quartz Envelopes with fixed Conductor Leads).
As described by others in this Thread, refer to the Equipment's Nameplate FLA (or better yet, MCA), and design the Branch Circuit from the Load indicated per Nameplate.
Sidenote: Having a 240V 3 Phase Delta System available from the Utility, is so nice to have at the Service Equipment, when the Client's Equipment is rated 230-240VAC 3 Phase.
Otherwise, such Equipment is connected to an SDS (Transformer with 240V 3 Phase Delta Secondary), and that SDS is either Corner Grounded or Center-Tap Grounded. I prefer Center-Tap Grounding.