[em field detector]

what are the features that can be added to a electromagnetic field detector?
a feature that might be power based?

thank you so much!

[cable route detector]

this is the description of my project:

A practical problem in domestic electrical installation is that during simple renovation of houses. Concealed electrical wiring makes difficult for the house owner to identify a suitable location to nail the wall. Also to estimate amount of current the cable is conducting without actually connecting to any measurement meter is definitely a great helpful for an electrician to plan on additional electrical installation. This project is to design an electronic circuit with a display unit, which will detect electromagnetic wave/any type of radiated wave a power cable might produce, and use for routing detection as well as to estimate the amount of current it is carrying

can i use the metal detector approach for this?
im a little confused... i really need advice please

[cable route detector]

thanks mp.. will do a some reading and come back :) thanks alot again!!

[cable route detector]

hello people..
im a newbie.. im need to design a device that can detects cable route and estimates current without physical connection to the power cable in concealed electrical installation.

i havent been able to find much circuit diagram or anythingregarding this topic. can someone please help me? and enlighten me plz? ???