"The fault is preceding the RCD," he told 6PR radio on Monday. "If you get a fault upstream, generally before the meter where the electricity is coming in, the RCD can't see it and can't operate." WA housing minister Peter Tinley said the Department of Housing was looking into the incident and cooperating with Energy Safety, which is undertaking an investigation. "We will get to the bottom of this," Mr Tinley told reporters. "We just hope that she pulls through.

"This is a tragedy that nobody should have to endure." Mr Tinley said the family would be immediately accommodated elsewhere if they didn't want to remain at the property, where the power has been cut off to make it safe. "If we have to put them in a hotel or a motel, then we'll do that," he said. "Clearly, they wouldn't have a lot of faith in the property. They won't be expected to move back into it." He said he was not aware of family's claims they had complained more than once about short-circuiting.

Mr Bunko said open circuit neutrals were less common in new houses because they had a lot of plastic pipework. "If you do get electric shocks off taps or you notice that your lights are dimming for no good reason, then you need to report it to the network operator," he said.​ Following the incident, neighbours reported hearing a "massive bang" at the home on the corner of Eddystone Avenue and Sandalford Drive, and emergency services quickly came to the scene. Denishar was revived by paramedics on the way to Princess Margaret Hospital, but again lost consciousness. She has now remained in a coma for over 48 hours.

On Monday morning, she was in a critical but stable condition. Her mother, Lacey Harrison, told 9 News Perth she tried desperately to help her daughter. "I went to grab my baby because I didn't realise how stuck she was to this energy," she said. "It dragged me onto her and I dropped down on the other side half way under my car. "She was on one side frying, I was on the other side frying."

Mother Lacey Harrison. Credit:9 News Perth According to the University of Western Australia's personal electrical safety course, a shock around 230 volts AC alone can be fatal. "Under normal circumstances, voltages below 50 volts are generally not harmful to humans," their programme reads. "However, they must still be treated with respect. "Electricity supply systems typically operate at 240 volts AC phase to earth and 415 volts AC phase to phase.

"A shock at these voltages can be fatal." National Electrical and Communications Association executive director Garry Itzstein also echoed these concerns. "Receiving an electric shock through a garden tap is very rare," he said. "Without knowing the circumstance, it is impossible to say what caused this however, there are a number of potential causes that will need to be looked into." Electrical work had recently been done on the home, and Denishar's mother said she had experienced a "burning electrical smell on and off" since the work had been completed, the ABC reports.

Mr Itzstein said there was a possibility the work wasn't up to Australian standards, or previous maintenance, repair work, additions or changes may have damaged the existing electrical systems. Loading "Home owners should also have the property's RCD units regularly inspected and tested. RCD's are the primary defence against electrical shocks so it is imperative that they are in place and regularly checked and tested," he said. - with AAP