theres a red wire, black and yellow. i turned the power supply to the shower off at the main switch board. but when cutting through the cables to repair it it nocked off another switch on the switch board even though the shower is on its own circuit. does this mean there is still power in the wires and is there any power in the yellow wire (earth). witch is the live wire red or black?
Power near shower or to? You have 220 power and both the red and black are live (will deliver 110 to earth.)