Are all neutrals connected?
All neutral wires of the same earthed (grounded) electrical system should have the same electrical potential, because they are all connected through the system ground.
Neutral conductors are usually insulated for the same voltage as the line conductors, with interesting exceptions..
Why do I have 2 black wires and 2 white wires?
If there is power in both the up and down position of your light switch, than that is the hot power. If the light was fed power first than here is how you connect the wires. Take your black (hot all the time wire) and marrett it onto the white of the opposite cable (that brings hot power down to your switch).
Why are there two neutral wires?
We normally use a common neutral point to make two saperate circuits to share the signals between them. Generally, The phase being the higher potential will provide the AC current which will be delivered back to the source by the neutral wire after serving the load.
Can you connect two neutral wires together?
Neutral wires from different circuits are NOT tied together except at the neutral buss in the panel. Neutral wires carry current. If you tie neutral wires together from different circuits then you run the risk of overloading the neutral wire, which could cause a fire.
Can two neutral wires touch?
No they cannot. The NEC clearly states that each neutral must terminate by itself in the lug. In a service panel they can share the same bus. No, but t can share the same buss.
How many neutral wires can be spliced together?
This is also known as a common neutral, and the circuits and neutral together are sometimes referred to as an Edison circuit. In a 3-phase system it is legal in some jurisdictions to share a single neutral wire between all three (3) phases. One neutral may not have two “hot” wires from the same phase.