Eddy Current Loss - The current that is generated
in the core due to the voltage that is induced in each lamination
by the alternating magnetic flux. The eddy current is proportional
to the square of the thickness of the lamination and to the square
of the frequency.
Elbow - An insulated and shielded device for
connecting high-voltage cables to apparatus.
Electric Fuse - see Fuse, Electric
Electrical Contractor - Any person, corporation,
company, firm, organization, or partnership performing or engaging
to perform, either for their or its own use or benefit, or for
that of another, and with or without remuneration or gain, any
work with respect to an electrical installation or any other work
to which Code applies.
Electric Elevator - An elevator in which the
motion of the car is obtained through an electric motor directly
applied to the elevator machinery.
Electric Vehicle - an automotive-type vehicle for highway
- includes passenger automobiles, buses, trucks,
vans, etc., primarily powered by an electric motor(s) that
draws current from a rechargeable storage battery, fuel cell,
photovoltaic array, or other source of electric
- excludes electric motorcycles, scooters for persons with disabilities
and similar type vehicles, and off-road
self-propelled electric vehicles, such as industrial trucks, hoists, lifts, transports,
golf carts, airline ground
support equipment, tractors, boats, etc.
Electric Vehicle Charging Equipment - the apparatus
and conductors, including the electric vehicle
connectors, attachment plugs, and all other fittings and devices,
specifically used for the purpose of delivering
current supply from the premises wiring to the electric vehicle.
Electric Vehicle Connector - a conductive or inductive
device that, by insertion into an inlet on the electric
vehicle, establishes connection to an electric vehicle.
Electric Vehicle Inlet - a conductive or inductive
device that is permanently affixed to the electric vehicle and
that by coupling into the connector, establishes a connection
the current supply.
Electrical Equipment - Any apparatus, appliance,
device, instrument, fitting, fixture, machinery, material, or thing
used in or for, or capable of being used in or for, the generation,
transformation, transmission, distribution, supply, or utilization
of electric power or energy, and without restricting the generality
of the foregoing, includes any assemblage or combination of materials
or things which is used, or is capable of being used or adapted,
to serve or perform any particular purpose or function when connected
to an electrical installation, notwithstanding that any of such
materials or things may be mechanical, metallic, or non-electric
Electrical Installation - The installation of
any wiring in or upon any land, building, or premises from the
point or points where electric power or energy is delivered therein
or thereon by the supply authority or from any other source of
supply, to the point or points where such power or energy can be
used therein or thereon by any electrical equipment and shall include
the connection of any such wiring with any of the said equipment,
and any part of the wiring aforesaid, and shall also include the
maintenance, alteration, extension, and repair of such wiring.
Electrical Metallic Tubing (EMT) - A raceway
of metal having circular cross-section into which it is intended
that conductors be drawn and which has a wall thinner than that
of rigid metal conduit and an outside diameter sufficiently different
from that of rigid conduit to render it impracticable for anyone
to thread it with standard pipe thread. (Intent -
EMT is not considered a metallic conduit since the outer walls
are too thin to be threaded)
Electrical Nonmetallic Tubing - A pliable nonmetallic
corrugated raceway having a circular cross-section.
Electricity - The flow of electrons.
Elevator - A hoisting and lowering mechanism
equipped with a car or platform which moves in guides in a substantially
vertical direction but not including tiering or piling machines
which operate within one storey, or endless belts, conveyors, chains,
buckets, or similar devices used for the purpose of elevating materials.
Elevator Machinery - The machinery and its equipment
used in raising and lowering the elevator car or platform.
Emergency Lighting - Lighting required by the
provisions of the National Building Code of Canada for the purpose
of facilitating safe exit and access to exit in the event of fire
or other emergency.
Energy - the result from the process of rapid change in state
of any matter. One of the primary characteristics of energy is
that it cannot be controlled (i.e. explosion), however it can
be harnessed (i.e. engine
Eutectic - An alloy with a melting point lower
than that of any other combination of the same components; an alloy
used as a fuse element to detect and protect against high damaging
environmental temperatures' a fuse element used to monitor long
overload conditions on a transformer by melting when a combined
temperature (top oil temperature rise due to loading plus temperature
rise due to current passing through element proper) equal to the
fuse's melting temperature is achieved.
Eventful Failure - Any electrical failure that
would result in: extensive apparatus damage and need for repair;
the spilling of hot and/or environmentally damaging fluids; that
which could result in loss of a human life; catastrophic failure;
violent failure; any electrical failure that is accomplished by
a visible demonstration and may include tank rupture, damage bushings
or loosened cover.
Explosion-Proof - Means enclosed in a case which
is capable of withstanding, without damage, an explosion, which
may occur within it, of a specified gas or vapour and capable of
preventing the ignition of a specified gas or vapour surrounding
the enclosure from sparks, flashes, or explosion of the specified
gas or vapour within the enclosure.
Exposed as Applied to Live Parts - Means that
live parts can be inadvertently touched or approached nearer than
a safe distance by a person and is applied to parts not suitably
guarded, isolated, or insulated.
Exposed as Applied to Wiring Methods - Means
Extra-Low-Voltage - see definition for Voltage.
Extra-Low-Voltage Power Circuit - A circuit,
such as valve operator and similar circuits, that is neither a
remote control circuit nor a signal circuit, but that operates
at not more than 30V and that is supplied from a transformer or
other device restricted in its rated output to 1000 VA and approved
for the purpose, but in which the current is not limited in accordance
with the requirements for a Class 2 circuit.