Code Quiz

Feb 11, 2006, By Steven Owen

What is the maximum number of overcurrent devices permitted in a lighting and appliance branch-circuit panelboard? What is the maximum number of overcurrent devices permitted in a power distribution unit (PDU) of an information technology system?...

Code Quiz

Jan 25, 2006, By Steven Owen

When installing a grid structure at a dwelling unit swimming pool, the equipotential bonding grid shall cover the contour of the pool and the pool deck...

Code Quiz

Jan 10, 2006, By Steven Owen

An equipotential plane installed at a catfish farm pond is required for the service equipment installed outdoors (adjacent to the pond), where the service equipment controls equipment is installed in and adjacent to the water....

Code Quiz

Dec 22, 2005, By Steven Owen

What is the minimum circuit ampacity and minimum size conductor required for the feeder conductors supplying the following group of electric arc welders?...

Code Quiz

Dec 8, 2005, By Steven Owen

When grounding a large bridge crane in an industrial facility, such as a paper mill or steel mill (or any other location), which of the following statements is correct?...

Code Quiz

Nov 18, 2005, By Steven Owen

What is the maximum number of multi-conductor cables (for control circuits only) permitted in an 18-inch wide by 4-inch deep ladder type cable tray?...

Code Quiz

Nov 7, 2005, By Steven Owen

What is the minimum cable tray width required for an installation that consists of six sets of 1,000 kcmil conductors (rated 600V) bundled in six sets of three-each conductors in an uncovered ladder type tray?...

Code Quiz

Oct 24, 2005, By Steven Owen

When grounding branch circuits – with respect to grounding requirements for receptacles and fixed equipment – in patient care areas of hospitals (critical care or general care areas), which of the following statements is correct?...

Code Quiz

Oct 7, 2005, By Steven Owen

A small strip mall consists of the following 10 tenants: a pharmacy; a 24-hour emergency medical treatment center, which provides a limited amount of critical care; and eight different retail shops. The common service disconnecting means for the entire group of tenants is equipped with ground-fault protection (one service and 10 feeders)...

Code Quiz

Sep 23, 2005, By Steven Owen

When installing a Combustible Gas Detection System (in industrial establishments with restricted public access, and using qualified personnel to service the installation) as a protection technique in a Class I hazardous (classified) location of Article 501, or a Zone location of Article 505, all but which of the following items shall be documented?...

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product spotlight

Emergency lighting controls

Feb 9, 2012 8:40 AM

The UL924 emergency lighting control relay (ERC) mounts in the ceiling and features an automatic diagnostic feature ...

View all 2012 Product Spotlights

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