Week 5 Definitions Flashcards
Concealed
Rendered inaccessible by the structure or finish of the building
Continuous duty
Operation at a substantially constant load for an indefinitely long time
Continuous load
A load where the maximum current is expected to continue for 3 hours or more
Demand factor
The ratio of the maximum demand of a system, or part of a system, to the total connected load of a system or the part of the system under consideration
Dry location
A location not normally subject to dampness or wetness. A location classified as dry may be temporarily subject to dampness or wetness, as in the case of a building under construction
Dusttight
Enclosures constructed so that dust will not enter under specified test conditions
Enclosed
Surrounded by a case, housing, fence, or wall(s) that prevents persons from accidentally contacting energized parts
Guarded
Covered, shielded, fenced, enclosed, or otherwise protected by means of suitable covers, casings, barriers, rails, screens, mats, or platforms to remove the likelihood of approach or contact by persons or objects to a point of danger
Enclosure
The case or housing of apparatus, or the fence of walls surrounding an installation to prevent personnel from accidentally contacting energized parts or to protect the equipment from physical damage
Energized
Electrically connected to, or is, a source of voltage
Explosion proof equipment
Equipment enclosed in a case that is capable of withstanding an explosion of a specified gas or vapor that might occur within it, that is capable of preventing the ignition of a specified gas or vapor surrounding the enclosure by sparks, flashes, or explosion of the gas or vapor within, and that operates at such an external temperature that a surrounding flammable atmosphere will not be ignited
Exposed (as applied to wiring methods)
On or attached to the surface or behind panels designed to allow access
In sight from (within sight from)
Equipment that is visible and not more than 15 m (50 ft) distant from other equipment is in sight from that other equipment
Isolated (as applied to location)
Not readily accessible to persons unless special means for access are used
Lighting outlet
An outlet intended for the direct connection of a lampholder or luminaire.
Live parts
Energized conductive components
Luminaire
A complete lighting unit consisting of a light source such as a lamp or lamps, together with the parts designed to position the light source and connect it to the power supply. It may also include parts to protect the light source or the ballast or to distribute the light. A lampholder itself is not a ________.
Multi-outlet assembly
A surface, flush, or freestanding assemblage with a raceway and fittings or other enclosure provided with one or more receptacles, for the purpose of supplying power to utilization equipment
Rainproof
Constructed, protected or treated so as to prevent rain from interfering with the successful operation of the apparatus under specified test conditions.
Raintight
Constructed or protected so that exposure to a beating rain will not result in the entrance of water under specified test conditions
Readily accessible
Capable of being reached quickly for operation, renewal, or inspections without requiring those to whom ready access is requisite to take actions such as to use tools (other than keys), to climb over or under, to remove obstacles, or to resort to portable ladders, and so forth
