Can wiring and plumbing be located in the same chase?

No most certainly not, firstly, if laying copper water pipes and then you lay wiring next to it, it doesnt matter how much of insulation there is it will cause electrolosis. And weaken the pipe causing it to burst therefore affecting the electrical wiring and water and electricity do not go well together. Secondly chasing galvanised pipe into a wall is definitely not recommended because when the galvanised pipe "sweats" it will start to rust as the moisture just sits in the wall also causing the pipe to burst and affecting the electrical wiring. There must be a minimum 200mm between the chasing for electrical wiring and Plumbing pipes.