Code Quiz
Feb 4, 2010, By Steven Owen
What is the interrupting rating of a circuit breaker that has no interrupter rating marked on it? ...
Code Quiz
Jan 21, 2010, By Steven Owen
When installing disconnecting means for multi-wire branch circuits in temporary installations, the disconnecting means must disconnect all ungrounded conductors at the power outlet or panelboard where the branch circuit originates. ...
Code Quiz
Jan 7, 2010, By Steven Owen
When installing underground service conductors to a building or structure, where the service conductors are installed in a trench that has 24 in. of cover, what marking is required at what distance above the underground installation? ...
Code Quiz
Dec 17, 2009, By Steven Owen
When working with electrical systems, including multi-conductor cables, identification of conductors is an important issue. ...
Code Quiz
Dec 3, 2009, By Steven Owen
A question has arisen related to the installation of a new 112.5kVA dry-type transformer, which is equipped with ventilated openings....
Code Quiz
Nov 19, 2009, By Steven Owen
A branch circuit overcurrent device is a device capable of providing protection......
Code Quiz
Nov 5, 2009, By Steven Owen
What are the minimum and maximum lengths permitted for the grounding conductor on network-powered broadband communications systems network interface units that contain protectors?...
Code Quiz
Oct 22, 2009, By Steven Owen
When installing receptacles for circuits and equipment operating at less than 50V in kitchens, laundries and other locations where portable appliances are likely to be used...
Code Quiz
Oct 8, 2009, By Steven Owen
What is the required minimum depth of the working space in the direction of live parts?...
Code Quiz
Sep 24, 2009, By Steven Owen
Installing wiring in escalators, moving walkways, platform lifts, stairway chairlift runways, machinery spaces, control spaces, or machine/control rooms...
Code Quiz
Sep 10, 2009,
When installing freestanding-type partitions that are cord-and-plug connected, electrically connected, and mechanically contiguous, which of the following statements is true?...
Code Quiz
Aug 20, 2009, By Steven Owen
Where exactly can manufactured wiring systems be installed?...
Code Quiz
Aug 6, 2009, By Steven Owen
For a portable or mobile sign, which is cord- and plug-connected, what is required to protect personnel who may touch or contact the sign?...
Code Quiz
Jul 16, 2009, By Steven Owen
When are two or more control circuits for permanent amusement attractions permitted to occupy the same cable, cable tray, enclosure, or raceway, without regard to whether the individual circuits are alternating current or direct current?...
Code Quiz
Jul 2, 2009, By Steven Owen
According to the 2008 NEC, who is permitted to service the control systems in a permanent amusement attraction? Hint: Have you reviewed the requirements of new Art. 522?...
Code Quiz
Jun 18, 2009, By Steven Owen
What is the minimum conductor size required for the feeder conductors, and what is the maximum size OCPD setting permitted per the above-referenced section of the Code?...
Code Quiz
Jun 4, 2009,
What is the minimum ampacity and size required for the supply neutral conductor is this example?...
Code Quiz
May 21, 2009, By Steven Owen
One such chemical may explode when mixed with air. What is that chemical?...
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?...
