Yes provided you have a ground, neutral and hot wire coming to the box.
Yes, you install a GFCI on a 2 wire circuit.
Grounding a plastic box is a little hard as plastic is a nonconductor.be satisfied with grounding to a ground wire.
Find the Hot side of the switch (Where there is voltage regardless of position of toggle on switch). Tie in new Black wire to GFCI. On wire nut with white wire tie in new white wire to GFCI. Do the same for the bare ground wire, if there is one.
No. Not if the GFCI is wired correctly. The neutral wire should always be cold, or at ground potential.
The ground wires are twisted together and then connected to the GFCI ground. The black and white wires may also be twisted together and then using a jumper wire connected to the GFCI. Hard to say without seeing exactly how it is wired.
Ground wire is loose or disconnected somewhere in that circuit.
There are two sets of terminals on a GFCI. They are labeled LINE and LOAD. Each set has a hot and a neutral. To wire a GFCI to an older two wire system without a grounding conductor, you terminate the hot wire coming from the panel to the line terminal(usually the brass colored one) and the neutral wire to the other one(usually the silver colored one). If there is another set, or sets(black and white) in the outlet box, they terminate on the load terminals respectively. Code requires any GFCI that has no grounding conductor(the bare one in modern wiring), to have the sticker which states no grounding conductor. This sticker comes with a new GFCI. The GFCI will still operate when there is a ground present. Basically, a GFCI monitors the current between the hot and neutral, if there is any imbalance, which would happen if some of the current was going through another grounded means, it will trip, thereby protecting you .
Likely an exposed wire inside the fixture or junction box. Get an real electrician to install GFCI lights and outlets anywhere you are using water to prevent being electrocuted . GFCI means Ground Fault Circuit Interuptors.
I assume you are hard wiring it and not plugging it in. The power coming into the GFCI outlet connects to the line side of the GFCI outlet. If you want the outdoor timer protected by the GFCI then connect the wire going to the timer to the load side of the outlet. If you do not want the timer protected then connect it to the line side. On the back of the GFCI if you look closely you will see Line & Load marked on the back.
An ELCB (Earth Leakage Circuit Breaker) distribution box is a type of electrical box that is used for electrical GFCI (Ground Fault Circuit Interrupter) outlets. This is the type of outlet that requires a three-prong plug in, one wire of which is grounded. GFCI outlets are set up so that if there is a circuit overload, the outlet is shut off until it is reset, manually.
An ELCB (Earth Leakage Circuit Breaker) distribution box is a type of electrical box that is used for electrical GFCI (Ground Fault Circuit Interrupter) outlets. This is the type of outlet that requires a three-prong plug in, one wire of which is grounded. GFCI outlets are set up so that if there is a circuit overload, the outlet is shut off until it is reset, manually.
Don't know what you mean by back wire, but most GFCI outlets have a circuit to attach additional outlets that will be protected by the GFCI. Keep total load in minds.