Code Quiz
May 7, 2009, By Steven Owen
With respect to hazardous (classified) locations, including Class I Group Classifications — only one group has a single chemical listed. Can you name the group letter designation and chemical?...
Code Quiz
Apr 23, 2009, By Steven Owen
When installing electrical equipment in manholes, which are intended for personnel entry, with all of the electrical equipment installed on one wall...
Code Quiz
Mar 19, 2009, By Steven Owen
When grounding network interface units containing protectors, network interface units with metallic enclosures, primary protectors, and the metallic members of the network-powered broadband communications cables that are intended to be grounded, which of the following requirements apply to the grounding conductor?...
Code Quiz
Mar 5, 2009, By Steven Owen
When installing coaxial cables beyond the point of grounding, when is it permissible to support coaxial cables by means of attachment to a conduit or other raceway?...
Code Quiz
Feb 19, 2009, By Steven Owen
When it comes to the placement of Class 1, Class 2, and Class 3 remote-control, signaling, and power-limited circuits, which one of the following statements meets Code requirements?...
Code Quiz
Feb 5, 2009, By Steven Owen
Cables for use in Class 1, Class 2, and Class 3 remote-control, signaling, and power-limited circuits shall have all but which of the following markings on the cables? Disregard any exception(s)....
Code Quiz
Jan 22, 2009, By Steven Owen
At an agricultural (farm) site, which one of the following locations does not require ground-fault circuit-interrupter protection for all 125V, single-phase, 15A and 20A general-purpose receptacles?...
Code Quiz
Jan 8, 2009, By Steven Owen
What are the minimum size current-carrying copper conductors required for the outlet that serves a professional xenon projector? The projector current rating is 55A. The projector is not considered to be a continuous load. The terminals are marked as 60°C....
Code Quiz
Dec 18, 2008,
With respect to fixed stage equipment other than switchboards, what is the maximum ampere load permitted on a 20A branch circuit serving floodlights, border lights, and proscenium sidelights?...
Code Quiz
Dec 4, 2008, By Steven Owen
When installing temporary wiring in exhibition halls, for events such as trade shows, the temporary wiring is...
Code Quiz
Nov 20, 2008, By Steven Owen
What is the minimum ampacity and minimum size conductor required for a circuit that connects a capacitor to the terminals of a 25 hp, 460VAC, 3-phase, air conditioner induction motor?...
Code Quiz
Nov 6, 2008, By Steven Owen
The insulation of batteries rated greater than 250V may be all but which of the following?...
Code Quiz
Oct 23, 2008, By Steven Owen
According to the 2008 NEC, one of the reasons why flame resistant clothing and equipment is required is to protect qualified persons from the hazard of ...
Code Quiz
Oct 9, 2008, By Steven Owen
When grounding the frames of metal-enclosed power switchgear, which of the following methods listed here is the only one that is permitted by the 2008 NEC?...
Code Quiz
Sep 18, 2008,
When grounding the ferromagnetic envelope of skin effect-heating systems, what are the grounding requirements?...
Code Quiz
Sep 4, 2008, By Steven Owen
According to the 2008 National Electrical Code, electric drinking fountains installed in public buildings, such as schools, must meet which of the following requirements...
Code Quiz
Aug 21, 2008, By Steven Owen
When bonding a swimming pool perimeter surface, where structural reinforcing steel is encapsulated in a nonconductive compound, the following conditions apply...
Code Quiz
Aug 7, 2008, By Steven Owen
When bonding a swimming pool shell, which of the following shall be considered conductive materials due to water permeability and porosity?...
Code Quiz
Jul 17, 2008, By Steven Owen
When installing a hand-hole enclosure flush with the surface of the earth surrounding it, do you know how to properly ground the enclosure, including the cover?...
Code Quiz
Jul 3, 2008, By Steven Owen
When installing a concealable nonmetallic extension from an existing 15A non-grounding receptacle outlet in an existing dwelling unit...
Code Quiz
Jun 19, 2008, By Steven Owen
What is the minimum cover requirement for an underground installation of a 13.8kV feeder installed in a 3-inch Schedule 80 rigid PVC nonmetallic conduit in the earth?...
Code Quiz
Jun 5, 2008, By Steven Owen
Which of the following wiring methods is the only one permitted to be installed under the roof decking in an industrial building without a minimum 1 ˝-inch spacing from the bottom edge of the roof decking?...
