Except for the ground wire they must be insulated.
Yes!
If you want to operate the conductors maximum capacity, the conductor needs the heat, that the amperage produces, to be dissipated. This is why in the electrical code book there are two amperage ratings. The first one is for a free air rating which allows for a high ampacity of the wire. The other rating is for three conductors in a conduit which confines the cooling capacity and so the ampacity rating of these wires is lowered. The same procedure is used in cable spacings in ladder tray networks.
Not always, the electrical code is quite specific as to the type of installation where the ground wire needs to be insulated and in what type of installation the ground wire can use bare copper.
The amperage rating is dependent upon the insulation rating. A pair of 25mm squared wires touching each other are rated at 131 amps. Three 25mm squared wires touching each other are rated at 110 amps.
Aluminum wires are insulated.
what may happen if wires are not insulated
Most are insulated to keep them from grounding out or interference.
Except for the ground wire they must be insulated.
Insulated wires and such and batteries.
Wires have to be insulated from each other to confine the current inside the wire. Most wires are insulated with a pvc sheath surrounding the copper wire.
Electronic devices are protected from power surges by having insulated wires
Soldering the wires together
Insulated wires and cables are commonly used conductors in power engineering
The primary purpose of twisting wires/cables is retaining flexibility while increasing the ampacity (current capacity of wire/conductor). Twisted wire/cable is more flexible than a solid wire with same ampacity.
Insulated wires are typically made of a conducting material, such as copper or aluminum, surrounded by an insulating material like rubber, PVC, or Teflon. The insulation is essential for protecting against electrical shocks and preventing short circuits.
Other objects that often have insulated wires include power cords, headphones, microwaves, and electric heaters. These wires are typically covered with materials like rubber, PVC, or Teflon to protect against electric shock and ensure proper conductivity.