Terms. Flashcards
- A branch circuit that supplies a number of outlets for lighting and appliances?
Branch circuit, general purpose.
- The circuit conductors between the final OC (breaker or fuze) and the outlet or outlets it supplies?
Branch circuit.
- A branch circuit supplying only one piece of equipment?
Individual branch circuit.
- A branch circuit consisting of two hot conductors having a 240 volt potential between them and a grounded conductor having 120 volt difference between it and each conductor?
Multi-wire (residential) branch circuit.
- A branch circuit supplying portable (can be unplugged and moved without tools) household kitchen appliances?
Small appliance branch circuit.
- A device that start and stop motors?
Controller.
- Equipment that carries but does not use electricity. Examples are receptacles, switches, and circuit breakers?
Device.
- A non-current-carrying conductor that provides an alternative path for equpment faults?
Equipment grounding conductor.
- Conductor supplying panel-boards other than service panels?
Feeder.
- A curve at the top of a service entrance cable designed to prevent water from entering the open end of the cable?
Gooseneck.
- A current-carrying conductor that is connected to earth and that may be a neutral?
Grounded conductor.
- Current traveling on an unintended path such as an equipment grounding conductor or equipment enclosure?
Ground fault.
- Visible without obstructions and within 50 feet?
In sight.
- An electrical panel for which more tan 10% of the circuits are rated at or less than 30 amps and are supplied with neutrals?
Lighting and appliance panel.
- The electrical demand in watts or hp of a piece of electrical equipment?
Load.
- The term now used to describe lighting fixtures?
Luminaire.
- Individual conductors not contained within a raceway or cable sheathing?
Open conductors.
- The guts of an electrical panel - the assembly of busbars, terminal bars, etc. designed to be placed in a cabinet?
Panel-boards. What is commonly called an electrical panel is, by NEC terms, a panel-board mounted in a cabinet.
- The overhead conductors supplied by the utility?
Service drop.
- The conductors on the customer’s premises that convey power to the service equipment?
Service entrance conductors.
- The equipment at which the power conductors entering the building can be switched off to disconnect the premise’s wiring from the utility power source?
Service equipment.
- Underground service entrance conductosr?
Service lateral.
- The point where the service drop and service entrance meet-it is the handoff between the utility and the customer?
Service point.
- A typical wall switch, including 3-way and 4-way switches?
Snap switch.
- A concrete encased grounding electrode, named after the developer of the system, Herbert Ufer.
Ufer.
- A switch that is an integral part of an appliance?
Unit switch.
- Available power from a transformer , measured in VA?
Apparent power.
- What is individual counter space?
Undivided by sink or cook top.
- How can heat be expressed mathematically?
As watts = IxIxR.
- What temperature does paper burn?
At about 451*F.
- Temperature rating of conductor insulation and typical breakers and equipment terminations?
- Conductor insulation: 60C, 75C, 90*C.
2. Breakers and equipment terminations: 60C, 75C.
- Complete systems of conduit or tubing through which conductors are installed?
Raceways.
- What is breaker lock out?
Device that keep breaker in shut off position.
- Other name for 3 way switch?
A single-pole double-throw switch.
- Why is hydromassage tub not a spa?
Because it is emptied after each use.
