A young girl who is fighting for her life after touching a garden tap outside her Perth home is believed to have been electrocuted due to a fault in the home's earthing system.

Denishar Woods, 11, is in a critical condition at Princess Margaret Hospital after touching the outdoor tap at her family’s Beldon property on Saturday night.

EnergySafety director of electricity compliance Mike Bunko said the fault was likely an upstream “open circuit neutral", which could be caused by corrosion, a loose connection and in some cases, poor workmanship.

View photos Denishar Woods remains in a critical condition after being shocked by a tap outside her home. Source: 7News More

Mr Bunko believes Denishar had up to 230 volts pass through her body, declaring "anything over 50 volts" as dangerous.

Denishar’s distraught mother Lacey Harrison said her daughter fell to the ground screaming when she tried to turn off the tap.

"She's only little, she should be going to school tomorrow, not sitting in a hospital bed with tubes coming out of her," an emotional Ms Harrison told reporters.

View photos Her mother, Lacey Harrison, has been left devastated. Source: 7News More

View photos EnergySafety director of electricity compliance Mike Bunko believes the source of the problem could be an upstream “open circuit neutral“ .Source: 7News More

The shock was so big, Denishar's heart had stopped and the current began warming up her organs. Her mother rushed to help but was also shocked.

A neighbour heard Ms Harrison's cries for help rushed to the home to find the pair covered in water. The neighbour was also injured from the shock before calling paramedics who quickly arrived.

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