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Electrical: General

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Ambient Temperature Ampacity Corrections for Cable Bundling and Direct Solar Exposure

A6091

[727.17 Kb]
Heat is one of the enemies of electrical systems. This study discusses the effects of ambient temperature and electrical loading on bundled cable and of direct sunlight on conductors in conduits. The results carry great import in determining ampacity corrections required to meet the National Electrical Code®. When de-rating tables are not applied in practice, serious consequences can result. Reprint, IAEI News, September 2003
(12 pgs.) 1 free (add’l $0.25 ea)

Building Wire: Copper vs. Aluminum
A6015
Survey results from 713 electrical contractors on their preferences for copper or aluminum in building wire applications. Contains tabular data and quotes from respondents.
(6 pgs.) 1 free (add’l $0.25 ea)

Comparative Corrosion and Current Burst Testing of Copper and Aluminum Electrical Power Connectors

A6108

[1.41Mb]
This IEEE Paper, presented at the 2005 Industry Applications Conference, reports on testing of aluminum and copper power connectors. The performance of copper and aluminum connectors was compared by conducting accelerated aging tests. The connectors were evaluated by comparing the change in resistance of the test samples as the test progressed. The results of these tests point to a high level of failure of the aluminum connectors.
(23 pgs.) 1 free (add’l $0.25 ea)

Derating: Outdoor Temperatures for Various U.S. Cities and Temperatures Inside Conduits on Rooftops Exposed to Direct Sunlight

A6116

[48 Kb]
A pocket-sized list of over 700 U.S. locations, their calculated average 2% design temperatures from ASHRAE data, the temperatures inside rooftop conduits at various heights above the roof, and the maximum temperature recorded for that locale.
(16 pgs.) 1 free (add’l $0.25 ea)

Rooftop Ampacity Adjustments

A6115


A pocket-sized slide tool designed to allow easy calculation of adjusted ampacities for conductors in conduits on rooftops exposed to direct sunlight, as required in the 2008 NEC. Contains temperature data for several dozen cities. A complement to booklet A6116.
1 free (add’l $0.25 ea)

Do You Need An Electrician?

A6059


A questionnaire encouraging consumers to self-inspect their homes for telltale signs of electrical problems. Contains ten questions with explanations. Also contains a list of questions to ask an electrician or electrical contractor in order to assess their qualifications.
1 free (add’l $0.25 ea). Available free to installers in bulk quantities by calling 212-251-7200.

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