https://www.leco.com/product/744-series
230 VAC +10%/-15% at max load 
50/60 Hz 
single phase 
25 Amps 
Receptacle Outlet: NEMA L14-30, LECO P/N 765-978, included in instrument component pack 
Receptacle Cover: single gang with 1.6-inch (4.06 cm) diameter opening, LECO P/N 608-898, 
included in instrument component pack