The Madera County Sheriff's Office says it happened around 5 p.m. Monday afternoon when the boy was playing with a power inverter.
MCSO Deputies, CAL Fire and first responders went to the home on Road 425A in Oakhurst and the boy was taken by ambulance to a local Vons, where he was then airlifted to a hospital in Fresno.
No further details on the boy's condition were immediately available.