The power entering the building from the utility main is an
alternating current. Standard connections use one hot, one
neutral or return path wire, and a bare copper ground wire.
Receptacles deliver power to portable
In theory the hot and neutral wires can be switched and the
power will flow, but it is important to keep them in phase
because ground and neutral wires run back to the same
connection within the panel.
The ground wire adds a safe path back to the grounding rod
buried near the service connection.
Ground fault interrupt circuits (GFIC) are required for
kitchen, bathroom, and outdoor weatherproof outlets. GFIC
prevent electrical shock by monitoring the current flow from
the hot to neutral wires. Any imbalance is sensed and the
circuit is shut off.
Note that in many jurisdictions arc fault interrupters are also
installed at the panel to sense shorts in electrical cords and
fixtures on the branch circuits.
Control switches for lights and fixtures
The breaker sizes for receptacle circuits are estimated by the
user and the electrician according to anticipated use.
Computers and peripheries complicate the calculations, but…