Code Quiz 

Mar 3, 2011, By Steven Owen

Per 250.190(B), when grounding a 5kV rated service disconnect operating at 4.16kV, what is the minimum size grounding electrode conductor for this service to connect the non-current metal parts of the metal-clad enclosure to ground? ...

Code Quiz 

Feb 17, 2011, By Steven Owen

When are single-pole circuit breakers with identified handle ties permitted to be used for the protection of ungrounded conductors for line-to-line connected loads?...

Code Quiz 

Feb 3, 2011, By Steven Owen

When are single-pole circuit breakers with identified handle ties permitted to be used for the protection of ungrounded conductors for line-to-line connected loads?...

Code Quiz 

Jan 20, 2011, By Steven Owen

New requirements for marking of cable trays apply when the cable trays contain ____________ conductors [(230.44)], or conductors rated at more than _________ [(392.18(H)]....

Code Quiz 

Jan 6, 2011, By Steven Owen

New requirements for marking of cable trays apply when the cable trays installed within substations contain conductors _________....

Code Quiz 

Dec 23, 2010, By Steven Owen

When applying the new requirements for disconnecting means for circuits operating at more than 600V — including inspections and tests of instrument transformers, protective relays, switching circuits, control and signal circuits, and more — which organization is mentioned as a source of information with respect to testing specifications?

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Code Quiz 

Dec 9, 2010, By Steven Owen

Where a raceway enclosing a feeder or a branch circuit enters a building or structure from an underground distribution system, it shall be ________ in accordance with 300.5(G)....

Code Quiz 

Nov 24, 2010, By Steven Owen

According to the 2011 NEC, a requirement for providing GFCI protection for 15A and 20A, single-phase, 125V receptacles was added to which of the following locations?...

Code Quiz 

Nov 11, 2010, By Steven Owen

According to the revised definition of "bathroom" in the 2011 NEC, which of the following items were added to the list of what constitutes a bathroom?...

Code Quiz 

Oct 21, 2010, By Steven Owen

When enclosing electrical equipment in an outdoor installation, other than equipment as described in 110.31(D), what is the minimum distance required between the fence and the live parts when the nominal voltage is 34.5kV?...

Code Quiz 

Oct 7, 2010, By Steven Owen

All but which of the following methods are permitted to guard live parts from accidental contact? Assume the nominal voltage of the system is 600V or less....

Code Quiz 

Sep 23, 2010, By Steven Owen

During new construction of dwelling units, what must be provided for communication equipment?...

Code Quiz 

Sep 9, 2010, By Steven Owen

Which of the following items is not required to be field marked to warn qualified personnel of potential electric arc flash hazards?...

Code Quiz 

Aug 26, 2010, By Steven Owen

With respect to interconnected electric power production sources (Art. 705), is it required to automatically disconnect a 3-phase primary power source from all ungrounded conductors when one of the phases opens to create a loss of power on one or more phases? ...

Code Quiz 

Aug 12, 2010, By Steven Owen

When is it permissible to install a listed plug-in-type backfed circuit breaker in a panelboard, without an additional fastener to secure the circuit breaker, so that removal of the circuit breaker requires other than a pull to release the circuit breaker from the mounting means on the panelboard?...

Code Quiz 

Jul 22, 2010, By Steven Owen

With respect to Art. 708 Critical Operations Power Systems (COPS), where physical security is required, the physical security shall consist of which of the following items?...

Code Quiz 

Jul 8, 2010, By Steven Owen

With respect to Art. 708 Critical Operations Power Systems (COPS), from which NFPA document are rules extracted?...

Code Quiz 

Jun 24, 2010, By Steven Owen

There are five ½-in. rigid metal conduits installed underground and connected to gasoline-dispensing equipment and other associated equipment. ...

Code Quiz 

Jun 10, 2010, By Steven Owen

With respect to single-pole circuit breakers used as disconnecting means for circuits, when is the use of identified or non-identified handle ties applied to multiple single-pole circuit breakers (intended to simultaneously disconnect all conductors of the circuit, including the grounded conductor, if any) not permitted?...

Code Quiz 

May 20, 2010, By Steven Owen

When are low-voltage control equipment, relays, motors and the like permitted to be installed in compartments with exposed high-voltage energized parts or high-voltage wiring with respect to equipment that is operating at over 600V?...

Code Quiz 

May 6, 2010, By Steven Owen

When installing service equipment for services rated more than 35kV (phase-to-phase), where conductors enter a building, the conductors shall terminate in _________....

Code Quiz 

Apr 22, 2010, By Steven Owen

In a surface metal raceway that measures 4 in. by 2 in., what is the maximum number of 12 AWG THHN, 600V insulated, single conductors, operating at 480V nominal permitted?...