That is a subjective question. If he is working on a system that is not powered (hooked up to electricity) then, other than getting wet, he is not in danger. If it is connected to a power source then of course it is unsafe as electricity travels through water.
They don't cost that much, and it also depends on where you are. I suggest you approach your electrician or electrical supplier, explain to him what you need it for and then he will then tell you the cost. Installation will be extra, as you can guess.
I'd find another electrician or at least demand that he explain how/why this will not jeopardize your home.
Replacing an electrical panel involves turning off the power, disconnecting the old panel, installing the new panel, connecting the wires, and testing the system to ensure it is working safely and properly. It is important to hire a licensed electrician to perform this task to ensure it is done correctly and meets all safety regulations.
The algebraic method I = Iosin ωt and I2 = Io2 sin2ωt can be used to explain the conceptions of root means square electrical field.
role of national electric code in the design of electrical installation
it converts electrical energy into mechanical energy
You call your local electrician to do any work on the service main. He or she will explain it to you, including the bending radius, fasteners, etc.
Not on government but on utility companys.
Protons have a single unit of positive electrical charge (+) Electrons have a single unit of negative electrical charge (-) Neutrons have no electrical charge
Cosmology, the study of all universes, should be looked at . Only I, in all of the human history, can explain what the movement of electrons which constitutes an electric current, really is.
-Electrical power -Control signals -Memory addresses -Data
explain why electrial charges flow from one atom to another