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We present the photometric and spectroscopic analysis of three Type II SNe:2014cx, 2014cy and 2015cz. SN 2014cx is a conventional Type IIP with a shallowslope (0.2 mag/50d) and an atypical short plateau ($\sim$86 d). SNe 2014cy and2015cz show relatively large decline rates (0.88 and 1.64 mag/50d,respectively) at early times before settling to the plateau phase, unlike thecanonical Type IIP/L SN light curves. All of them are normal luminosity SN IIwith an absolute magnitude at mid-plateau ofM$_{V,14cx}^{50}$=$-$16.6$\pm$0.4$\,\rm{mag}$,M$_{V,14cy}^{50}$=$-$16.5$\,\pm\,$0.2$\,\rm{mag}$ andM$_{V,15cz}^{50}$=$-$17.4$\,\pm\,$0.3$\,\rm{mag}$. A relatively broad range of$^{56}$Ni masses is ejected in these explosions (0.027-0.070 M$_\odot$). Thespectra show the classical evolution of Type II SNe, dominated by a bluecontinuum with broad H lines at early phases and narrower metal lines with PCygni profiles during the plateau. High-velocity H I features are identified inthe plateau spectra of SN 2014cx at 11600 km s$^{-1}$, possibly a sign ofejecta-circumstellar interaction. The spectra of SN 2014cy exhibit strongabsorption profile of H I similar to normal luminosity events whereas strongmetal lines akin to sub-luminous SNe. The analytical modelling of thebolometric light curve of the three events yields similar radii for the threeobjects within errors (478, 507 and 608 R$_\odot$ for SNe 2014cx, 2014cy and2015cz, respectively) and a range of ejecta masses (15.0, 22.2 and 18.7M$_\odot$ for SNe 2014cx, 2014cy and 2015cz), and a modest range of explosionenergies (3.3 - 6.0 foe where 1 foe = 10$^{51}$ erg).

The optical properties of three type II supernovae: 2014cx, 2014cy and 2015cz