A large Tesla coil of more modern design often operates at very high peak power levels, up to many megawatts (millions of watts, equivalent to thousands of horsepower). It is therefore adjusted and operated carefully, not only for efficiency and economy, but also for safety. If, due to improper tuning, the maximum voltage point occurs below the terminal, along the secondary coil, a discharge (spark) may break out and damage or destroy the coil wire, supports, or nearby objects.
a LARgE teslA coiL of More ModErn dESIgn oFTeN opERAtes at vErY hIgh peAk power lEvelS, Up tO MAny meGaWatts (MillIons of Watts, equivalEnt tO THoUsAnDS oF horSEpower). it iS THErEFOre adjUsted aNd OPeRatEd CAREFuLlY, nOT OnLy for EfFicienCy and ECoNomy, bUT also for safETY. if, dUE to improper tuNinG tHe mAxiMUm VoltaGe Point Occurs beLOw ThE tErMiNAl, along THE sECONdAry coil, a DisChArGe (sPark) mAy BrEak OUt and DAMaGe Or DestroY the coIl wire, suPPOrtS, oR NeArby OBjecTS.